X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/33baccd88ef45ebbb35e4c2ad7b87c7b91432f55..afed2c01903465f9a486ac481a66aa3413cc1b01:/tests/test_black.py?ds=sidebyside diff --git a/tests/test_black.py b/tests/test_black.py index 1271290..5da247b 100644 --- a/tests/test_black.py +++ b/tests/test_black.py @@ -1,56 +1,79 @@ #!/usr/bin/env python3 + import asyncio -from concurrent.futures import ThreadPoolExecutor -from contextlib import contextmanager -from functools import partial -from io import BytesIO, TextIOWrapper +import inspect +import io +import logging +import multiprocessing import os -from pathlib import Path import re import sys -from tempfile import TemporaryDirectory -from typing import Any, BinaryIO, Generator, List, Tuple, Iterator +import types import unittest -from unittest.mock import patch - +from concurrent.futures import ThreadPoolExecutor +from contextlib import contextmanager, redirect_stderr +from dataclasses import replace +from io import BytesIO +from pathlib import Path +from platform import system +from tempfile import TemporaryDirectory +from typing import ( + Any, + Callable, + Dict, + Iterator, + List, + Optional, + Sequence, + TypeVar, + Union, +) +from unittest.mock import MagicMock, patch + +import click +import pytest from click import unstyle from click.testing import CliRunner +from pathspec import PathSpec import black +import black.files +from black import Feature, TargetVersion +from black import re_compile_maybe_verbose as compile_pattern +from black.cache import get_cache_dir, get_cache_file +from black.debug import DebugVisitor +from black.output import color_diff, diff +from black.report import Report + +# Import other test classes +from tests.util import ( + DATA_DIR, + DEFAULT_MODE, + DETERMINISTIC_HEADER, + PROJECT_ROOT, + PY36_VERSIONS, + THIS_DIR, + BlackBaseTestCase, + assert_format, + change_directory, + dump_to_stderr, + ff, + fs, + get_case_path, + read_data, + read_data_from_file, +) - -ll = 88 -ff = partial(black.format_file_in_place, line_length=ll, fast=True) -fs = partial(black.format_str, line_length=ll) THIS_FILE = Path(__file__) -THIS_DIR = THIS_FILE.parent -EMPTY_LINE = "# EMPTY LINE WITH WHITESPACE" + " (this comment will be removed)" - - -def dump_to_stderr(*output: str) -> str: - return "\n" + "\n".join(output) + "\n" - +EMPTY_CONFIG = THIS_DIR / "data" / "empty_pyproject.toml" +PY36_ARGS = [f"--target-version={version.name.lower()}" for version in PY36_VERSIONS] +DEFAULT_EXCLUDE = black.re_compile_maybe_verbose(black.const.DEFAULT_EXCLUDES) +DEFAULT_INCLUDE = black.re_compile_maybe_verbose(black.const.DEFAULT_INCLUDES) +T = TypeVar("T") +R = TypeVar("R") -def read_data(name: str) -> Tuple[str, str]: - """read_data('test_name') -> 'input', 'output'""" - if not name.endswith((".py", ".pyi", ".out", ".diff")): - name += ".py" - _input: List[str] = [] - _output: List[str] = [] - with open(THIS_DIR / name, "r", encoding="utf8") as test: - lines = test.readlines() - result = _input - for line in lines: - line = line.replace(EMPTY_LINE, "") - if line.rstrip() == "# output": - result = _output - continue - - result.append(line) - if _input and not _output: - # If there's no output marker, treat the entire file as already pre-formatted. - _output = _input[:] - return "".join(_input).strip() + "\n", "".join(_output).strip() + "\n" +# Match the time output in a diff, but nothing else +DIFF_TIME = re.compile(r"\t[\d\-:+\. ]+") @contextmanager @@ -59,74 +82,65 @@ def cache_dir(exists: bool = True) -> Iterator[Path]: cache_dir = Path(workspace) if not exists: cache_dir = cache_dir / "new" - with patch("black.CACHE_DIR", cache_dir): + with patch("black.cache.CACHE_DIR", cache_dir): yield cache_dir @contextmanager -def event_loop(close: bool) -> Iterator[None]: +def event_loop() -> Iterator[None]: policy = asyncio.get_event_loop_policy() - old_loop = policy.get_event_loop() loop = policy.new_event_loop() asyncio.set_event_loop(loop) try: yield finally: - policy.set_event_loop(old_loop) - if close: - loop.close() + loop.close() -class BlackRunner(CliRunner): - """Modify CliRunner so that stderr is not merged with stdout. +class FakeContext(click.Context): + """A fake click Context for when calling functions that need it.""" - This is a hack that can be removed once we depend on Click 7.x""" + def __init__(self) -> None: + self.default_map: Dict[str, Any] = {} + # Dummy root, since most of the tests don't care about it + self.obj: Dict[str, Any] = {"root": PROJECT_ROOT} - def __init__(self, stderrbuf: BinaryIO) -> None: - self.stderrbuf = stderrbuf - super().__init__() - @contextmanager - def isolation(self, *args: Any, **kwargs: Any) -> Generator[BinaryIO, None, None]: - with super().isolation(*args, **kwargs) as output: - try: - hold_stderr = sys.stderr - sys.stderr = TextIOWrapper(self.stderrbuf, encoding=self.charset) - yield output - finally: - sys.stderr = hold_stderr +class FakeParameter(click.Parameter): + """A fake click Parameter for when calling functions that need it.""" + def __init__(self) -> None: + pass -class BlackTestCase(unittest.TestCase): - maxDiff = None - def assertFormatEqual(self, expected: str, actual: str) -> None: - if actual != expected and not os.environ.get("SKIP_AST_PRINT"): - bdv: black.DebugVisitor[Any] - black.out("Expected tree:", fg="green") - try: - exp_node = black.lib2to3_parse(expected) - bdv = black.DebugVisitor() - list(bdv.visit(exp_node)) - except Exception as ve: - black.err(str(ve)) - black.out("Actual tree:", fg="red") - try: - exp_node = black.lib2to3_parse(actual) - bdv = black.DebugVisitor() - list(bdv.visit(exp_node)) - except Exception as ve: - black.err(str(ve)) - self.assertEqual(expected, actual) +class BlackRunner(CliRunner): + """Make sure STDOUT and STDERR are kept separate when testing Black via its CLI.""" + + def __init__(self) -> None: + super().__init__(mix_stderr=False) - @patch("black.dump_to_file", dump_to_stderr) - def test_empty(self) -> None: - source = expected = "" - actual = fs(source) - self.assertFormatEqual(expected, actual) - black.assert_equivalent(source, actual) - black.assert_stable(source, actual, line_length=ll) + +def invokeBlack( + args: List[str], exit_code: int = 0, ignore_config: bool = True +) -> None: + runner = BlackRunner() + if ignore_config: + args = ["--verbose", "--config", str(THIS_DIR / "empty.toml"), *args] + result = runner.invoke(black.main, args, catch_exceptions=False) + assert result.stdout_bytes is not None + assert result.stderr_bytes is not None + msg = ( + f"Failed with args: {args}\n" + f"stdout: {result.stdout_bytes.decode()!r}\n" + f"stderr: {result.stderr_bytes.decode()!r}\n" + f"exception: {result.exception}" + ) + assert result.exit_code == exit_code, msg + + +class BlackTestCase(BlackBaseTestCase): + invokeBlack = staticmethod(invokeBlack) def test_empty_ff(self) -> None: expected = "" @@ -139,86 +153,97 @@ class BlackTestCase(unittest.TestCase): os.unlink(tmp_file) self.assertFormatEqual(expected, actual) - @patch("black.dump_to_file", dump_to_stderr) - def test_self(self) -> None: - source, expected = read_data("test_black") - actual = fs(source) - self.assertFormatEqual(expected, actual) - black.assert_equivalent(source, actual) - black.assert_stable(source, actual, line_length=ll) - self.assertFalse(ff(THIS_FILE)) - - @patch("black.dump_to_file", dump_to_stderr) - def test_black(self) -> None: - source, expected = read_data("../black") - actual = fs(source) - self.assertFormatEqual(expected, actual) - black.assert_equivalent(source, actual) - black.assert_stable(source, actual, line_length=ll) - self.assertFalse(ff(THIS_DIR / ".." / "black.py")) + def test_experimental_string_processing_warns(self) -> None: + self.assertWarns( + black.mode.Deprecated, black.Mode, experimental_string_processing=True + ) def test_piping(self) -> None: - source, expected = read_data("../black") - stderrbuf = BytesIO() - result = BlackRunner(stderrbuf).invoke( - black.main, ["-", "--fast", f"--line-length={ll}"], input=source + source, expected = read_data_from_file(PROJECT_ROOT / "src/black/__init__.py") + result = BlackRunner().invoke( + black.main, + [ + "-", + "--fast", + f"--line-length={black.DEFAULT_LINE_LENGTH}", + f"--config={EMPTY_CONFIG}", + ], + input=BytesIO(source.encode("utf8")), ) self.assertEqual(result.exit_code, 0) self.assertFormatEqual(expected, result.output) - black.assert_equivalent(source, result.output) - black.assert_stable(source, result.output, line_length=ll) + if source != result.output: + black.assert_equivalent(source, result.output) + black.assert_stable(source, result.output, DEFAULT_MODE) def test_piping_diff(self) -> None: diff_header = re.compile( - rf"(STDIN|STDOUT)\t\d\d\d\d-\d\d-\d\d " - rf"\d\d:\d\d:\d\d\.\d\d\d\d\d\d \+\d\d\d\d" + r"(STDIN|STDOUT)\t\d\d\d\d-\d\d-\d\d \d\d:\d\d:\d\d\.\d\d\d\d\d\d " + r"\+\d\d\d\d" ) - source, _ = read_data("expression.py") - expected, _ = read_data("expression.diff") - stderrbuf = BytesIO() - result = BlackRunner(stderrbuf).invoke( - black.main, ["-", "--fast", f"--line-length={ll}", "--diff"], input=source + source, _ = read_data("simple_cases", "expression.py") + expected, _ = read_data("simple_cases", "expression.diff") + args = [ + "-", + "--fast", + f"--line-length={black.DEFAULT_LINE_LENGTH}", + "--diff", + f"--config={EMPTY_CONFIG}", + ] + result = BlackRunner().invoke( + black.main, args, input=BytesIO(source.encode("utf8")) ) self.assertEqual(result.exit_code, 0) - actual = diff_header.sub("[Deterministic header]", result.output) + actual = diff_header.sub(DETERMINISTIC_HEADER, result.output) actual = actual.rstrip() + "\n" # the diff output has a trailing space self.assertEqual(expected, actual) - @patch("black.dump_to_file", dump_to_stderr) - def test_setup(self) -> None: - source, expected = read_data("../setup") - actual = fs(source) - self.assertFormatEqual(expected, actual) - black.assert_equivalent(source, actual) - black.assert_stable(source, actual, line_length=ll) - self.assertFalse(ff(THIS_DIR / ".." / "setup.py")) - - @patch("black.dump_to_file", dump_to_stderr) - def test_function(self) -> None: - source, expected = read_data("function") - actual = fs(source) - self.assertFormatEqual(expected, actual) - black.assert_equivalent(source, actual) - black.assert_stable(source, actual, line_length=ll) + def test_piping_diff_with_color(self) -> None: + source, _ = read_data("simple_cases", "expression.py") + args = [ + "-", + "--fast", + f"--line-length={black.DEFAULT_LINE_LENGTH}", + "--diff", + "--color", + f"--config={EMPTY_CONFIG}", + ] + result = BlackRunner().invoke( + black.main, args, input=BytesIO(source.encode("utf8")) + ) + actual = result.output + # Again, the contents are checked in a different test, so only look for colors. + self.assertIn("\033[1m", actual) + self.assertIn("\033[36m", actual) + self.assertIn("\033[32m", actual) + self.assertIn("\033[31m", actual) + self.assertIn("\033[0m", actual) @patch("black.dump_to_file", dump_to_stderr) - def test_function2(self) -> None: - source, expected = read_data("function2") - actual = fs(source) + def _test_wip(self) -> None: + source, expected = read_data("miscellaneous", "wip") + sys.settrace(tracefunc) + mode = replace( + DEFAULT_MODE, + experimental_string_processing=False, + target_versions={black.TargetVersion.PY38}, + ) + actual = fs(source, mode=mode) + sys.settrace(None) self.assertFormatEqual(expected, actual) black.assert_equivalent(source, actual) - black.assert_stable(source, actual, line_length=ll) + black.assert_stable(source, actual, black.FileMode()) - @patch("black.dump_to_file", dump_to_stderr) - def test_expression(self) -> None: - source, expected = read_data("expression") - actual = fs(source) - self.assertFormatEqual(expected, actual) - black.assert_equivalent(source, actual) - black.assert_stable(source, actual, line_length=ll) + def test_pep_572_version_detection(self) -> None: + source, _ = read_data("py_38", "pep_572") + root = black.lib2to3_parse(source) + features = black.get_features_used(root) + self.assertIn(black.Feature.ASSIGNMENT_EXPRESSIONS, features) + versions = black.detect_target_versions(root) + self.assertIn(black.TargetVersion.PY38, versions) def test_expression_ff(self) -> None: - source, expected = read_data("expression") + source, expected = read_data("simple_cases", "expression.py") tmp_file = Path(black.dump_to_file(source)) try: self.assertTrue(ff(tmp_file, write_back=black.WriteBack.YES)) @@ -229,194 +254,176 @@ class BlackTestCase(unittest.TestCase): self.assertFormatEqual(expected, actual) with patch("black.dump_to_file", dump_to_stderr): black.assert_equivalent(source, actual) - black.assert_stable(source, actual, line_length=ll) + black.assert_stable(source, actual, DEFAULT_MODE) def test_expression_diff(self) -> None: - source, _ = read_data("expression.py") - expected, _ = read_data("expression.diff") + source, _ = read_data("simple_cases", "expression.py") + expected, _ = read_data("simple_cases", "expression.diff") tmp_file = Path(black.dump_to_file(source)) diff_header = re.compile( rf"{re.escape(str(tmp_file))}\t\d\d\d\d-\d\d-\d\d " - rf"\d\d:\d\d:\d\d\.\d\d\d\d\d\d \+\d\d\d\d" + r"\d\d:\d\d:\d\d\.\d\d\d\d\d\d \+\d\d\d\d" ) - stderrbuf = BytesIO() try: - result = BlackRunner(stderrbuf).invoke( - black.main, ["--diff", str(tmp_file)] + result = BlackRunner().invoke( + black.main, ["--diff", str(tmp_file), f"--config={EMPTY_CONFIG}"] ) self.assertEqual(result.exit_code, 0) finally: os.unlink(tmp_file) actual = result.output - actual = diff_header.sub("[Deterministic header]", actual) - actual = actual.rstrip() + "\n" # the diff output has a trailing space + actual = diff_header.sub(DETERMINISTIC_HEADER, actual) if expected != actual: dump = black.dump_to_file(actual) msg = ( - f"Expected diff isn't equal to the actual. If you made changes " - f"to expression.py and this is an anticipated difference, " - f"overwrite tests/expression.diff with {dump}" + "Expected diff isn't equal to the actual. If you made changes to" + " expression.py and this is an anticipated difference, overwrite" + f" tests/data/expression.diff with {dump}" ) self.assertEqual(expected, actual, msg) - @patch("black.dump_to_file", dump_to_stderr) - def test_fstring(self) -> None: - source, expected = read_data("fstring") - actual = fs(source) - self.assertFormatEqual(expected, actual) - black.assert_equivalent(source, actual) - black.assert_stable(source, actual, line_length=ll) + def test_expression_diff_with_color(self) -> None: + source, _ = read_data("simple_cases", "expression.py") + expected, _ = read_data("simple_cases", "expression.diff") + tmp_file = Path(black.dump_to_file(source)) + try: + result = BlackRunner().invoke( + black.main, + ["--diff", "--color", str(tmp_file), f"--config={EMPTY_CONFIG}"], + ) + finally: + os.unlink(tmp_file) + actual = result.output + # We check the contents of the diff in `test_expression_diff`. All + # we need to check here is that color codes exist in the result. + self.assertIn("\033[1m", actual) + self.assertIn("\033[36m", actual) + self.assertIn("\033[32m", actual) + self.assertIn("\033[31m", actual) + self.assertIn("\033[0m", actual) + + def test_detect_pos_only_arguments(self) -> None: + source, _ = read_data("py_38", "pep_570") + root = black.lib2to3_parse(source) + features = black.get_features_used(root) + self.assertIn(black.Feature.POS_ONLY_ARGUMENTS, features) + versions = black.detect_target_versions(root) + self.assertIn(black.TargetVersion.PY38, versions) + + def test_detect_debug_f_strings(self) -> None: + root = black.lib2to3_parse("""f"{x=}" """) + features = black.get_features_used(root) + self.assertIn(black.Feature.DEBUG_F_STRINGS, features) + versions = black.detect_target_versions(root) + self.assertIn(black.TargetVersion.PY38, versions) + + root = black.lib2to3_parse( + """f"{x}"\nf'{"="}'\nf'{(x:=5)}'\nf'{f(a="3=")}'\nf'{x:=10}'\n""" + ) + features = black.get_features_used(root) + self.assertNotIn(black.Feature.DEBUG_F_STRINGS, features) + + # We don't yet support feature version detection in nested f-strings + root = black.lib2to3_parse( + """f"heard a rumour that { f'{1+1=}' } ... seems like it could be true" """ + ) + features = black.get_features_used(root) + self.assertNotIn(black.Feature.DEBUG_F_STRINGS, features) @patch("black.dump_to_file", dump_to_stderr) def test_string_quotes(self) -> None: - source, expected = read_data("string_quotes") - actual = fs(source) - self.assertFormatEqual(expected, actual) - black.assert_equivalent(source, actual) - black.assert_stable(source, actual, line_length=ll) - mode = black.FileMode.NO_STRING_NORMALIZATION + source, expected = read_data("miscellaneous", "string_quotes") + mode = black.Mode(preview=True) + assert_format(source, expected, mode) + mode = replace(mode, string_normalization=False) not_normalized = fs(source, mode=mode) - self.assertFormatEqual(source, not_normalized) + self.assertFormatEqual(source.replace("\\\n", ""), not_normalized) black.assert_equivalent(source, not_normalized) - black.assert_stable(source, not_normalized, line_length=ll, mode=mode) - - @patch("black.dump_to_file", dump_to_stderr) - def test_slices(self) -> None: - source, expected = read_data("slices") - actual = fs(source) - self.assertFormatEqual(expected, actual) - black.assert_equivalent(source, actual) - black.assert_stable(source, actual, line_length=ll) - - @patch("black.dump_to_file", dump_to_stderr) - def test_comments(self) -> None: - source, expected = read_data("comments") - actual = fs(source) - self.assertFormatEqual(expected, actual) - black.assert_equivalent(source, actual) - black.assert_stable(source, actual, line_length=ll) - - @patch("black.dump_to_file", dump_to_stderr) - def test_comments2(self) -> None: - source, expected = read_data("comments2") - actual = fs(source) - self.assertFormatEqual(expected, actual) - black.assert_equivalent(source, actual) - black.assert_stable(source, actual, line_length=ll) - - @patch("black.dump_to_file", dump_to_stderr) - def test_comments3(self) -> None: - source, expected = read_data("comments3") - actual = fs(source) - self.assertFormatEqual(expected, actual) - black.assert_equivalent(source, actual) - black.assert_stable(source, actual, line_length=ll) - - @patch("black.dump_to_file", dump_to_stderr) - def test_comments4(self) -> None: - source, expected = read_data("comments4") - actual = fs(source) - self.assertFormatEqual(expected, actual) - black.assert_equivalent(source, actual) - black.assert_stable(source, actual, line_length=ll) - - @patch("black.dump_to_file", dump_to_stderr) - def test_comments5(self) -> None: - source, expected = read_data("comments5") - actual = fs(source) - self.assertFormatEqual(expected, actual) - black.assert_equivalent(source, actual) - black.assert_stable(source, actual, line_length=ll) - - @patch("black.dump_to_file", dump_to_stderr) - def test_cantfit(self) -> None: - source, expected = read_data("cantfit") - actual = fs(source) - self.assertFormatEqual(expected, actual) - black.assert_equivalent(source, actual) - black.assert_stable(source, actual, line_length=ll) - - @patch("black.dump_to_file", dump_to_stderr) - def test_import_spacing(self) -> None: - source, expected = read_data("import_spacing") - actual = fs(source) - self.assertFormatEqual(expected, actual) - black.assert_equivalent(source, actual) - black.assert_stable(source, actual, line_length=ll) - - @patch("black.dump_to_file", dump_to_stderr) - def test_composition(self) -> None: - source, expected = read_data("composition") - actual = fs(source) - self.assertFormatEqual(expected, actual) - black.assert_equivalent(source, actual) - black.assert_stable(source, actual, line_length=ll) - - @patch("black.dump_to_file", dump_to_stderr) - def test_empty_lines(self) -> None: - source, expected = read_data("empty_lines") - actual = fs(source) - self.assertFormatEqual(expected, actual) - black.assert_equivalent(source, actual) - black.assert_stable(source, actual, line_length=ll) - - @patch("black.dump_to_file", dump_to_stderr) - def test_string_prefixes(self) -> None: - source, expected = read_data("string_prefixes") - actual = fs(source) - self.assertFormatEqual(expected, actual) - black.assert_equivalent(source, actual) - black.assert_stable(source, actual, line_length=ll) - - @patch("black.dump_to_file", dump_to_stderr) - def test_python2(self) -> None: - source, expected = read_data("python2") - actual = fs(source) - self.assertFormatEqual(expected, actual) - # black.assert_equivalent(source, actual) - black.assert_stable(source, actual, line_length=ll) - - @patch("black.dump_to_file", dump_to_stderr) - def test_python2_unicode_literals(self) -> None: - source, expected = read_data("python2_unicode_literals") - actual = fs(source) - self.assertFormatEqual(expected, actual) - black.assert_stable(source, actual, line_length=ll) - - @patch("black.dump_to_file", dump_to_stderr) - def test_stub(self) -> None: - mode = black.FileMode.PYI - source, expected = read_data("stub.pyi") - actual = fs(source, mode=mode) - self.assertFormatEqual(expected, actual) - black.assert_stable(source, actual, line_length=ll, mode=mode) + black.assert_stable(source, not_normalized, mode=mode) - @patch("black.dump_to_file", dump_to_stderr) - def test_fmtonoff(self) -> None: - source, expected = read_data("fmtonoff") - actual = fs(source) - self.assertFormatEqual(expected, actual) - black.assert_equivalent(source, actual) - black.assert_stable(source, actual, line_length=ll) + def test_skip_magic_trailing_comma(self) -> None: + source, _ = read_data("simple_cases", "expression") + expected, _ = read_data( + "miscellaneous", "expression_skip_magic_trailing_comma.diff" + ) + tmp_file = Path(black.dump_to_file(source)) + diff_header = re.compile( + rf"{re.escape(str(tmp_file))}\t\d\d\d\d-\d\d-\d\d " + r"\d\d:\d\d:\d\d\.\d\d\d\d\d\d \+\d\d\d\d" + ) + try: + result = BlackRunner().invoke( + black.main, ["-C", "--diff", str(tmp_file), f"--config={EMPTY_CONFIG}"] + ) + self.assertEqual(result.exit_code, 0) + finally: + os.unlink(tmp_file) + actual = result.output + actual = diff_header.sub(DETERMINISTIC_HEADER, actual) + actual = actual.rstrip() + "\n" # the diff output has a trailing space + if expected != actual: + dump = black.dump_to_file(actual) + msg = ( + "Expected diff isn't equal to the actual. If you made changes to" + " expression.py and this is an anticipated difference, overwrite" + f" tests/data/expression_skip_magic_trailing_comma.diff with {dump}" + ) + self.assertEqual(expected, actual, msg) @patch("black.dump_to_file", dump_to_stderr) - def test_remove_empty_parentheses_after_class(self) -> None: - source, expected = read_data("class_blank_parentheses") + def test_async_as_identifier(self) -> None: + source_path = get_case_path("miscellaneous", "async_as_identifier") + source, expected = read_data_from_file(source_path) actual = fs(source) self.assertFormatEqual(expected, actual) - black.assert_equivalent(source, actual) - black.assert_stable(source, actual, line_length=ll) + major, minor = sys.version_info[:2] + if major < 3 or (major <= 3 and minor < 7): + black.assert_equivalent(source, actual) + black.assert_stable(source, actual, DEFAULT_MODE) + # ensure black can parse this when the target is 3.6 + self.invokeBlack([str(source_path), "--target-version", "py36"]) + # but not on 3.7, because async/await is no longer an identifier + self.invokeBlack([str(source_path), "--target-version", "py37"], exit_code=123) @patch("black.dump_to_file", dump_to_stderr) - def test_new_line_between_class_and_code(self) -> None: - source, expected = read_data("class_methods_new_line") + def test_python37(self) -> None: + source_path = get_case_path("py_37", "python37") + source, expected = read_data_from_file(source_path) actual = fs(source) self.assertFormatEqual(expected, actual) - black.assert_equivalent(source, actual) - black.assert_stable(source, actual, line_length=ll) + major, minor = sys.version_info[:2] + if major > 3 or (major == 3 and minor >= 7): + black.assert_equivalent(source, actual) + black.assert_stable(source, actual, DEFAULT_MODE) + # ensure black can parse this when the target is 3.7 + self.invokeBlack([str(source_path), "--target-version", "py37"]) + # but not on 3.6, because we use async as a reserved keyword + self.invokeBlack([str(source_path), "--target-version", "py36"], exit_code=123) + + def test_tab_comment_indentation(self) -> None: + contents_tab = "if 1:\n\tif 2:\n\t\tpass\n\t# comment\n\tpass\n" + contents_spc = "if 1:\n if 2:\n pass\n # comment\n pass\n" + self.assertFormatEqual(contents_spc, fs(contents_spc)) + self.assertFormatEqual(contents_spc, fs(contents_tab)) + + contents_tab = "if 1:\n\tif 2:\n\t\tpass\n\t\t# comment\n\tpass\n" + contents_spc = "if 1:\n if 2:\n pass\n # comment\n pass\n" + self.assertFormatEqual(contents_spc, fs(contents_spc)) + self.assertFormatEqual(contents_spc, fs(contents_tab)) + + # mixed tabs and spaces (valid Python 2 code) + contents_tab = "if 1:\n if 2:\n\t\tpass\n\t# comment\n pass\n" + contents_spc = "if 1:\n if 2:\n pass\n # comment\n pass\n" + self.assertFormatEqual(contents_spc, fs(contents_spc)) + self.assertFormatEqual(contents_spc, fs(contents_tab)) + + contents_tab = "if 1:\n if 2:\n\t\tpass\n\t\t# comment\n pass\n" + contents_spc = "if 1:\n if 2:\n pass\n # comment\n pass\n" + self.assertFormatEqual(contents_spc, fs(contents_spc)) + self.assertFormatEqual(contents_spc, fs(contents_tab)) def test_report_verbose(self) -> None: - report = black.Report(verbose=True) + report = Report(verbose=True) out_lines = [] err_lines = [] @@ -426,7 +433,7 @@ class BlackTestCase(unittest.TestCase): def err(msg: str, **kwargs: Any) -> None: err_lines.append(msg) - with patch("black.out", out), patch("black.err", err): + with patch("black.output._out", out), patch("black.output._err", err): report.done(Path("f1"), black.Changed.NO) self.assertEqual(len(out_lines), 1) self.assertEqual(len(err_lines), 0) @@ -459,8 +466,8 @@ class BlackTestCase(unittest.TestCase): self.assertEqual(err_lines[-1], "error: cannot format e1: boom") self.assertEqual( unstyle(str(report)), - "1 file reformatted, 2 files left unchanged, " - "1 file failed to reformat.", + "1 file reformatted, 2 files left unchanged, 1 file failed to" + " reformat.", ) self.assertEqual(report.return_code, 123) report.done(Path("f3"), black.Changed.YES) @@ -469,8 +476,8 @@ class BlackTestCase(unittest.TestCase): self.assertEqual(out_lines[-1], "reformatted f3") self.assertEqual( unstyle(str(report)), - "2 files reformatted, 2 files left unchanged, " - "1 file failed to reformat.", + "2 files reformatted, 2 files left unchanged, 1 file failed to" + " reformat.", ) self.assertEqual(report.return_code, 123) report.failed(Path("e2"), "boom") @@ -479,8 +486,8 @@ class BlackTestCase(unittest.TestCase): self.assertEqual(err_lines[-1], "error: cannot format e2: boom") self.assertEqual( unstyle(str(report)), - "2 files reformatted, 2 files left unchanged, " - "2 files failed to reformat.", + "2 files reformatted, 2 files left unchanged, 2 files failed to" + " reformat.", ) self.assertEqual(report.return_code, 123) report.path_ignored(Path("wat"), "no match") @@ -489,8 +496,8 @@ class BlackTestCase(unittest.TestCase): self.assertEqual(out_lines[-1], "wat ignored: no match") self.assertEqual( unstyle(str(report)), - "2 files reformatted, 2 files left unchanged, " - "2 files failed to reformat.", + "2 files reformatted, 2 files left unchanged, 2 files failed to" + " reformat.", ) self.assertEqual(report.return_code, 123) report.done(Path("f4"), black.Changed.NO) @@ -499,19 +506,26 @@ class BlackTestCase(unittest.TestCase): self.assertEqual(out_lines[-1], "f4 already well formatted, good job.") self.assertEqual( unstyle(str(report)), - "2 files reformatted, 3 files left unchanged, " - "2 files failed to reformat.", + "2 files reformatted, 3 files left unchanged, 2 files failed to" + " reformat.", ) self.assertEqual(report.return_code, 123) report.check = True self.assertEqual( unstyle(str(report)), - "2 files would be reformatted, 3 files would be left unchanged, " - "2 files would fail to reformat.", + "2 files would be reformatted, 3 files would be left unchanged, 2 files" + " would fail to reformat.", + ) + report.check = False + report.diff = True + self.assertEqual( + unstyle(str(report)), + "2 files would be reformatted, 3 files would be left unchanged, 2 files" + " would fail to reformat.", ) def test_report_quiet(self) -> None: - report = black.Report(quiet=True) + report = Report(quiet=True) out_lines = [] err_lines = [] @@ -521,7 +535,7 @@ class BlackTestCase(unittest.TestCase): def err(msg: str, **kwargs: Any) -> None: err_lines.append(msg) - with patch("black.out", out), patch("black.err", err): + with patch("black.output._out", out), patch("black.output._err", err): report.done(Path("f1"), black.Changed.NO) self.assertEqual(len(out_lines), 0) self.assertEqual(len(err_lines), 0) @@ -549,8 +563,8 @@ class BlackTestCase(unittest.TestCase): self.assertEqual(err_lines[-1], "error: cannot format e1: boom") self.assertEqual( unstyle(str(report)), - "1 file reformatted, 2 files left unchanged, " - "1 file failed to reformat.", + "1 file reformatted, 2 files left unchanged, 1 file failed to" + " reformat.", ) self.assertEqual(report.return_code, 123) report.done(Path("f3"), black.Changed.YES) @@ -558,8 +572,8 @@ class BlackTestCase(unittest.TestCase): self.assertEqual(len(err_lines), 1) self.assertEqual( unstyle(str(report)), - "2 files reformatted, 2 files left unchanged, " - "1 file failed to reformat.", + "2 files reformatted, 2 files left unchanged, 1 file failed to" + " reformat.", ) self.assertEqual(report.return_code, 123) report.failed(Path("e2"), "boom") @@ -568,8 +582,8 @@ class BlackTestCase(unittest.TestCase): self.assertEqual(err_lines[-1], "error: cannot format e2: boom") self.assertEqual( unstyle(str(report)), - "2 files reformatted, 2 files left unchanged, " - "2 files failed to reformat.", + "2 files reformatted, 2 files left unchanged, 2 files failed to" + " reformat.", ) self.assertEqual(report.return_code, 123) report.path_ignored(Path("wat"), "no match") @@ -577,8 +591,8 @@ class BlackTestCase(unittest.TestCase): self.assertEqual(len(err_lines), 2) self.assertEqual( unstyle(str(report)), - "2 files reformatted, 2 files left unchanged, " - "2 files failed to reformat.", + "2 files reformatted, 2 files left unchanged, 2 files failed to" + " reformat.", ) self.assertEqual(report.return_code, 123) report.done(Path("f4"), black.Changed.NO) @@ -586,15 +600,22 @@ class BlackTestCase(unittest.TestCase): self.assertEqual(len(err_lines), 2) self.assertEqual( unstyle(str(report)), - "2 files reformatted, 3 files left unchanged, " - "2 files failed to reformat.", + "2 files reformatted, 3 files left unchanged, 2 files failed to" + " reformat.", ) self.assertEqual(report.return_code, 123) report.check = True self.assertEqual( unstyle(str(report)), - "2 files would be reformatted, 3 files would be left unchanged, " - "2 files would fail to reformat.", + "2 files would be reformatted, 3 files would be left unchanged, 2 files" + " would fail to reformat.", + ) + report.check = False + report.diff = True + self.assertEqual( + unstyle(str(report)), + "2 files would be reformatted, 3 files would be left unchanged, 2 files" + " would fail to reformat.", ) def test_report_normal(self) -> None: @@ -608,7 +629,7 @@ class BlackTestCase(unittest.TestCase): def err(msg: str, **kwargs: Any) -> None: err_lines.append(msg) - with patch("black.out", out), patch("black.err", err): + with patch("black.output._out", out), patch("black.output._err", err): report.done(Path("f1"), black.Changed.NO) self.assertEqual(len(out_lines), 0) self.assertEqual(len(err_lines), 0) @@ -638,8 +659,8 @@ class BlackTestCase(unittest.TestCase): self.assertEqual(err_lines[-1], "error: cannot format e1: boom") self.assertEqual( unstyle(str(report)), - "1 file reformatted, 2 files left unchanged, " - "1 file failed to reformat.", + "1 file reformatted, 2 files left unchanged, 1 file failed to" + " reformat.", ) self.assertEqual(report.return_code, 123) report.done(Path("f3"), black.Changed.YES) @@ -648,8 +669,8 @@ class BlackTestCase(unittest.TestCase): self.assertEqual(out_lines[-1], "reformatted f3") self.assertEqual( unstyle(str(report)), - "2 files reformatted, 2 files left unchanged, " - "1 file failed to reformat.", + "2 files reformatted, 2 files left unchanged, 1 file failed to" + " reformat.", ) self.assertEqual(report.return_code, 123) report.failed(Path("e2"), "boom") @@ -658,8 +679,8 @@ class BlackTestCase(unittest.TestCase): self.assertEqual(err_lines[-1], "error: cannot format e2: boom") self.assertEqual( unstyle(str(report)), - "2 files reformatted, 2 files left unchanged, " - "2 files failed to reformat.", + "2 files reformatted, 2 files left unchanged, 2 files failed to" + " reformat.", ) self.assertEqual(report.return_code, 123) report.path_ignored(Path("wat"), "no match") @@ -667,8 +688,8 @@ class BlackTestCase(unittest.TestCase): self.assertEqual(len(err_lines), 2) self.assertEqual( unstyle(str(report)), - "2 files reformatted, 2 files left unchanged, " - "2 files failed to reformat.", + "2 files reformatted, 2 files left unchanged, 2 files failed to" + " reformat.", ) self.assertEqual(report.return_code, 123) report.done(Path("f4"), black.Changed.NO) @@ -676,34 +697,157 @@ class BlackTestCase(unittest.TestCase): self.assertEqual(len(err_lines), 2) self.assertEqual( unstyle(str(report)), - "2 files reformatted, 3 files left unchanged, " - "2 files failed to reformat.", + "2 files reformatted, 3 files left unchanged, 2 files failed to" + " reformat.", ) self.assertEqual(report.return_code, 123) report.check = True self.assertEqual( unstyle(str(report)), - "2 files would be reformatted, 3 files would be left unchanged, " - "2 files would fail to reformat.", + "2 files would be reformatted, 3 files would be left unchanged, 2 files" + " would fail to reformat.", + ) + report.check = False + report.diff = True + self.assertEqual( + unstyle(str(report)), + "2 files would be reformatted, 3 files would be left unchanged, 2 files" + " would fail to reformat.", + ) + + def test_lib2to3_parse(self) -> None: + with self.assertRaises(black.InvalidInput): + black.lib2to3_parse("invalid syntax") + + straddling = "x + y" + black.lib2to3_parse(straddling) + black.lib2to3_parse(straddling, {TargetVersion.PY36}) + + py2_only = "print x" + with self.assertRaises(black.InvalidInput): + black.lib2to3_parse(py2_only, {TargetVersion.PY36}) + + py3_only = "exec(x, end=y)" + black.lib2to3_parse(py3_only) + black.lib2to3_parse(py3_only, {TargetVersion.PY36}) + + def test_get_features_used_decorator(self) -> None: + # Test the feature detection of new decorator syntax + # since this makes some test cases of test_get_features_used() + # fails if it fails, this is tested first so that a useful case + # is identified + simples, relaxed = read_data("miscellaneous", "decorators") + # skip explanation comments at the top of the file + for simple_test in simples.split("##")[1:]: + node = black.lib2to3_parse(simple_test) + decorator = str(node.children[0].children[0]).strip() + self.assertNotIn( + Feature.RELAXED_DECORATORS, + black.get_features_used(node), + msg=( + f"decorator '{decorator}' follows python<=3.8 syntax" + "but is detected as 3.9+" + # f"The full node is\n{node!r}" + ), + ) + # skip the '# output' comment at the top of the output part + for relaxed_test in relaxed.split("##")[1:]: + node = black.lib2to3_parse(relaxed_test) + decorator = str(node.children[0].children[0]).strip() + self.assertIn( + Feature.RELAXED_DECORATORS, + black.get_features_used(node), + msg=( + f"decorator '{decorator}' uses python3.9+ syntax" + "but is detected as python<=3.8" + # f"The full node is\n{node!r}" + ), ) - def test_is_python36(self) -> None: + def test_get_features_used(self) -> None: node = black.lib2to3_parse("def f(*, arg): ...\n") - self.assertFalse(black.is_python36(node)) + self.assertEqual(black.get_features_used(node), set()) node = black.lib2to3_parse("def f(*, arg,): ...\n") - self.assertTrue(black.is_python36(node)) + self.assertEqual(black.get_features_used(node), {Feature.TRAILING_COMMA_IN_DEF}) + node = black.lib2to3_parse("f(*arg,)\n") + self.assertEqual( + black.get_features_used(node), {Feature.TRAILING_COMMA_IN_CALL} + ) node = black.lib2to3_parse("def f(*, arg): f'string'\n") - self.assertTrue(black.is_python36(node)) - source, expected = read_data("function") + self.assertEqual(black.get_features_used(node), {Feature.F_STRINGS}) + node = black.lib2to3_parse("123_456\n") + self.assertEqual(black.get_features_used(node), {Feature.NUMERIC_UNDERSCORES}) + node = black.lib2to3_parse("123456\n") + self.assertEqual(black.get_features_used(node), set()) + source, expected = read_data("simple_cases", "function") node = black.lib2to3_parse(source) - self.assertTrue(black.is_python36(node)) + expected_features = { + Feature.TRAILING_COMMA_IN_CALL, + Feature.TRAILING_COMMA_IN_DEF, + Feature.F_STRINGS, + } + self.assertEqual(black.get_features_used(node), expected_features) node = black.lib2to3_parse(expected) - self.assertTrue(black.is_python36(node)) - source, expected = read_data("expression") + self.assertEqual(black.get_features_used(node), expected_features) + source, expected = read_data("simple_cases", "expression") node = black.lib2to3_parse(source) - self.assertFalse(black.is_python36(node)) + self.assertEqual(black.get_features_used(node), set()) node = black.lib2to3_parse(expected) - self.assertFalse(black.is_python36(node)) + self.assertEqual(black.get_features_used(node), set()) + node = black.lib2to3_parse("lambda a, /, b: ...") + self.assertEqual(black.get_features_used(node), {Feature.POS_ONLY_ARGUMENTS}) + node = black.lib2to3_parse("def fn(a, /, b): ...") + self.assertEqual(black.get_features_used(node), {Feature.POS_ONLY_ARGUMENTS}) + node = black.lib2to3_parse("def fn(): yield a, b") + self.assertEqual(black.get_features_used(node), set()) + node = black.lib2to3_parse("def fn(): return a, b") + self.assertEqual(black.get_features_used(node), set()) + node = black.lib2to3_parse("def fn(): yield *b, c") + self.assertEqual(black.get_features_used(node), {Feature.UNPACKING_ON_FLOW}) + node = black.lib2to3_parse("def fn(): return a, *b, c") + self.assertEqual(black.get_features_used(node), {Feature.UNPACKING_ON_FLOW}) + node = black.lib2to3_parse("x = a, *b, c") + self.assertEqual(black.get_features_used(node), set()) + node = black.lib2to3_parse("x: Any = regular") + self.assertEqual(black.get_features_used(node), set()) + node = black.lib2to3_parse("x: Any = (regular, regular)") + self.assertEqual(black.get_features_used(node), set()) + node = black.lib2to3_parse("x: Any = Complex(Type(1))[something]") + self.assertEqual(black.get_features_used(node), set()) + node = black.lib2to3_parse("x: Tuple[int, ...] = a, b, c") + self.assertEqual( + black.get_features_used(node), {Feature.ANN_ASSIGN_EXTENDED_RHS} + ) + node = black.lib2to3_parse("try: pass\nexcept Something: pass") + self.assertEqual(black.get_features_used(node), set()) + node = black.lib2to3_parse("try: pass\nexcept (*Something,): pass") + self.assertEqual(black.get_features_used(node), set()) + node = black.lib2to3_parse("try: pass\nexcept *Group: pass") + self.assertEqual(black.get_features_used(node), {Feature.EXCEPT_STAR}) + node = black.lib2to3_parse("a[*b]") + self.assertEqual(black.get_features_used(node), {Feature.VARIADIC_GENERICS}) + node = black.lib2to3_parse("a[x, *y(), z] = t") + self.assertEqual(black.get_features_used(node), {Feature.VARIADIC_GENERICS}) + node = black.lib2to3_parse("def fn(*args: *T): pass") + self.assertEqual(black.get_features_used(node), {Feature.VARIADIC_GENERICS}) + + def test_get_features_used_for_future_flags(self) -> None: + for src, features in [ + ("from __future__ import annotations", {Feature.FUTURE_ANNOTATIONS}), + ( + "from __future__ import (other, annotations)", + {Feature.FUTURE_ANNOTATIONS}, + ), + ("a = 1 + 2\nfrom something import annotations", set()), + ("from __future__ import x, y", set()), + ]: + with self.subTest(src=src, features=features): + node = black.lib2to3_parse(src) + future_imports = black.get_future_imports(node) + self.assertEqual( + black.get_features_used(node, future_imports=future_imports), + features, + ) def test_get_future_imports(self) -> None: node = black.lib2to3_parse("\n") @@ -726,10 +870,19 @@ class BlackTestCase(unittest.TestCase): self.assertEqual(set(), black.get_future_imports(node)) node = black.lib2to3_parse("from some.module import black\n") self.assertEqual(set(), black.get_future_imports(node)) + node = black.lib2to3_parse( + "from __future__ import unicode_literals as _unicode_literals" + ) + self.assertEqual({"unicode_literals"}, black.get_future_imports(node)) + node = black.lib2to3_parse( + "from __future__ import unicode_literals as _lol, print" + ) + self.assertEqual({"unicode_literals", "print"}, black.get_future_imports(node)) + @pytest.mark.incompatible_with_mypyc def test_debug_visitor(self) -> None: - source, _ = read_data("debug_visitor.py") - expected, _ = read_data("debug_visitor.out") + source, _ = read_data("miscellaneous", "debug_visitor") + expected, _ = read_data("miscellaneous", "debug_visitor.out") out_lines = [] err_lines = [] @@ -739,8 +892,8 @@ class BlackTestCase(unittest.TestCase): def err(msg: str, **kwargs: Any) -> None: err_lines.append(msg) - with patch("black.out", out), patch("black.err", err): - black.DebugVisitor.show(source) + with patch("black.debug.out", out): + DebugVisitor.show(source) actual = "\n".join(out_lines) + "\n" log_name = "" if expected != actual: @@ -753,21 +906,22 @@ class BlackTestCase(unittest.TestCase): def test_format_file_contents(self) -> None: empty = "" + mode = DEFAULT_MODE with self.assertRaises(black.NothingChanged): - black.format_file_contents(empty, line_length=ll, fast=False) + black.format_file_contents(empty, mode=mode, fast=False) just_nl = "\n" with self.assertRaises(black.NothingChanged): - black.format_file_contents(just_nl, line_length=ll, fast=False) - same = "l = [1, 2, 3]\n" + black.format_file_contents(just_nl, mode=mode, fast=False) + same = "j = [1, 2, 3]\n" with self.assertRaises(black.NothingChanged): - black.format_file_contents(same, line_length=ll, fast=False) - different = "l = [1,2,3]" + black.format_file_contents(same, mode=mode, fast=False) + different = "j = [1,2,3]" expected = same - actual = black.format_file_contents(different, line_length=ll, fast=False) + actual = black.format_file_contents(different, mode=mode, fast=False) self.assertEqual(expected, actual) invalid = "return if you can" - with self.assertRaises(ValueError) as e: - black.format_file_contents(invalid, line_length=ll, fast=False) + with self.assertRaises(black.InvalidInput) as e: + black.format_file_contents(invalid, mode=mode, fast=False) self.assertEqual(str(e.exception), "Cannot parse: 1:7: return if you can") def test_endmarker(self) -> None: @@ -776,6 +930,7 @@ class BlackTestCase(unittest.TestCase): self.assertEqual(len(n.children), 1) self.assertEqual(n.children[0].type, black.token.ENDMARKER) + @pytest.mark.incompatible_with_mypyc @unittest.skipIf(os.environ.get("SKIP_AST_PRINT"), "user set SKIP_AST_PRINT") def test_assertFormatEqual(self) -> None: out_lines = [] @@ -787,216 +942,79 @@ class BlackTestCase(unittest.TestCase): def err(msg: str, **kwargs: Any) -> None: err_lines.append(msg) - with patch("black.out", out), patch("black.err", err): + with patch("black.output._out", out), patch("black.output._err", err): with self.assertRaises(AssertionError): - self.assertFormatEqual("l = [1, 2, 3]", "l = [1, 2, 3,]") + self.assertFormatEqual("j = [1, 2, 3]", "j = [1, 2, 3,]") out_str = "".join(out_lines) - self.assertTrue("Expected tree:" in out_str) - self.assertTrue("Actual tree:" in out_str) + self.assertIn("Expected tree:", out_str) + self.assertIn("Actual tree:", out_str) self.assertEqual("".join(err_lines), "") - def test_cache_broken_file(self) -> None: - mode = black.FileMode.AUTO_DETECT + @event_loop() + @patch("concurrent.futures.ProcessPoolExecutor", MagicMock(side_effect=OSError)) + def test_works_in_mono_process_only_environment(self) -> None: with cache_dir() as workspace: - cache_file = black.get_cache_file(black.DEFAULT_LINE_LENGTH, mode) - with cache_file.open("w") as fobj: - fobj.write("this is not a pickle") - self.assertEqual(black.read_cache(black.DEFAULT_LINE_LENGTH, mode), {}) - src = (workspace / "test.py").resolve() - with src.open("w") as fobj: - fobj.write("print('hello')") - result = CliRunner().invoke(black.main, [str(src)]) - self.assertEqual(result.exit_code, 0) - cache = black.read_cache(black.DEFAULT_LINE_LENGTH, mode) - self.assertIn(src, cache) - - def test_cache_single_file_already_cached(self) -> None: - mode = black.FileMode.AUTO_DETECT - with cache_dir() as workspace: - src = (workspace / "test.py").resolve() - with src.open("w") as fobj: - fobj.write("print('hello')") - black.write_cache({}, [src], black.DEFAULT_LINE_LENGTH, mode) - result = CliRunner().invoke(black.main, [str(src)]) - self.assertEqual(result.exit_code, 0) - with src.open("r") as fobj: - self.assertEqual(fobj.read(), "print('hello')") - - @event_loop(close=False) - def test_cache_multiple_files(self) -> None: - mode = black.FileMode.AUTO_DETECT - with cache_dir() as workspace, patch( - "black.ProcessPoolExecutor", new=ThreadPoolExecutor - ): - one = (workspace / "one.py").resolve() - with one.open("w") as fobj: - fobj.write("print('hello')") - two = (workspace / "two.py").resolve() - with two.open("w") as fobj: - fobj.write("print('hello')") - black.write_cache({}, [one], black.DEFAULT_LINE_LENGTH, mode) - result = CliRunner().invoke(black.main, [str(workspace)]) - self.assertEqual(result.exit_code, 0) - with one.open("r") as fobj: - self.assertEqual(fobj.read(), "print('hello')") - with two.open("r") as fobj: - self.assertEqual(fobj.read(), 'print("hello")\n') - cache = black.read_cache(black.DEFAULT_LINE_LENGTH, mode) - self.assertIn(one, cache) - self.assertIn(two, cache) - - def test_no_cache_when_writeback_diff(self) -> None: - mode = black.FileMode.AUTO_DETECT - with cache_dir() as workspace: - src = (workspace / "test.py").resolve() - with src.open("w") as fobj: - fobj.write("print('hello')") - result = CliRunner().invoke(black.main, [str(src), "--diff"]) - self.assertEqual(result.exit_code, 0) - cache_file = black.get_cache_file(black.DEFAULT_LINE_LENGTH, mode) - self.assertFalse(cache_file.exists()) - - def test_no_cache_when_stdin(self) -> None: - mode = black.FileMode.AUTO_DETECT - with cache_dir(): - result = CliRunner().invoke(black.main, ["-"], input="print('hello')") - self.assertEqual(result.exit_code, 0) - cache_file = black.get_cache_file(black.DEFAULT_LINE_LENGTH, mode) - self.assertFalse(cache_file.exists()) - - def test_read_cache_no_cachefile(self) -> None: - mode = black.FileMode.AUTO_DETECT - with cache_dir(): - self.assertEqual(black.read_cache(black.DEFAULT_LINE_LENGTH, mode), {}) - - def test_write_cache_read_cache(self) -> None: - mode = black.FileMode.AUTO_DETECT - with cache_dir() as workspace: - src = (workspace / "test.py").resolve() - src.touch() - black.write_cache({}, [src], black.DEFAULT_LINE_LENGTH, mode) - cache = black.read_cache(black.DEFAULT_LINE_LENGTH, mode) - self.assertIn(src, cache) - self.assertEqual(cache[src], black.get_cache_info(src)) - - def test_filter_cached(self) -> None: - with TemporaryDirectory() as workspace: - path = Path(workspace) - uncached = (path / "uncached").resolve() - cached = (path / "cached").resolve() - cached_but_changed = (path / "changed").resolve() - uncached.touch() - cached.touch() - cached_but_changed.touch() - cache = {cached: black.get_cache_info(cached), cached_but_changed: (0.0, 0)} - todo, done = black.filter_cached( - cache, {uncached, cached, cached_but_changed} - ) - self.assertEqual(todo, {uncached, cached_but_changed}) - self.assertEqual(done, {cached}) - - def test_write_cache_creates_directory_if_needed(self) -> None: - mode = black.FileMode.AUTO_DETECT - with cache_dir(exists=False) as workspace: - self.assertFalse(workspace.exists()) - black.write_cache({}, [], black.DEFAULT_LINE_LENGTH, mode) - self.assertTrue(workspace.exists()) - - @event_loop(close=False) - def test_failed_formatting_does_not_get_cached(self) -> None: - mode = black.FileMode.AUTO_DETECT - with cache_dir() as workspace, patch( - "black.ProcessPoolExecutor", new=ThreadPoolExecutor - ): - failing = (workspace / "failing.py").resolve() - with failing.open("w") as fobj: - fobj.write("not actually python") - clean = (workspace / "clean.py").resolve() - with clean.open("w") as fobj: - fobj.write('print("hello")\n') - result = CliRunner().invoke(black.main, [str(workspace)]) - self.assertEqual(result.exit_code, 123) - cache = black.read_cache(black.DEFAULT_LINE_LENGTH, mode) - self.assertNotIn(failing, cache) - self.assertIn(clean, cache) - - def test_write_cache_write_fail(self) -> None: - mode = black.FileMode.AUTO_DETECT - with cache_dir(), patch.object(Path, "open") as mock: - mock.side_effect = OSError - black.write_cache({}, [], black.DEFAULT_LINE_LENGTH, mode) - - @event_loop(close=False) + for f in [ + (workspace / "one.py").resolve(), + (workspace / "two.py").resolve(), + ]: + f.write_text('print("hello")\n') + self.invokeBlack([str(workspace)]) + + @event_loop() def test_check_diff_use_together(self) -> None: with cache_dir(): # Files which will be reformatted. - src1 = (THIS_DIR / "string_quotes.py").resolve() - result = CliRunner().invoke(black.main, [str(src1), "--diff", "--check"]) - self.assertEqual(result.exit_code, 1) - + src1 = get_case_path("miscellaneous", "string_quotes") + self.invokeBlack([str(src1), "--diff", "--check"], exit_code=1) # Files which will not be reformatted. - src2 = (THIS_DIR / "composition.py").resolve() - result = CliRunner().invoke(black.main, [str(src2), "--diff", "--check"]) - self.assertEqual(result.exit_code, 0) - + src2 = get_case_path("simple_cases", "composition") + self.invokeBlack([str(src2), "--diff", "--check"]) # Multi file command. - result = CliRunner().invoke( - black.main, [str(src1), str(src2), "--diff", "--check"] - ) - self.assertEqual(result.exit_code, 1, result.output) + self.invokeBlack([str(src1), str(src2), "--diff", "--check"], exit_code=1) - def test_no_files(self) -> None: + def test_no_src_fails(self) -> None: with cache_dir(): - # Without an argument, black exits with error code 0. - result = CliRunner().invoke(black.main, []) - self.assertEqual(result.exit_code, 0) + self.invokeBlack([], exit_code=1) + + def test_src_and_code_fails(self) -> None: + with cache_dir(): + self.invokeBlack([".", "-c", "0"], exit_code=1) def test_broken_symlink(self) -> None: with cache_dir() as workspace: symlink = workspace / "broken_link.py" try: symlink.symlink_to("nonexistent.py") - except OSError as e: + except (OSError, NotImplementedError) as e: self.skipTest(f"Can't create symlinks: {e}") - result = CliRunner().invoke(black.main, [str(workspace.resolve())]) - self.assertEqual(result.exit_code, 0) - - def test_read_cache_line_lengths(self) -> None: - mode = black.FileMode.AUTO_DETECT - with cache_dir() as workspace: - path = (workspace / "file.py").resolve() - path.touch() - black.write_cache({}, [path], 1, mode) - one = black.read_cache(1, mode) - self.assertIn(path, one) - two = black.read_cache(2, mode) - self.assertNotIn(path, two) + self.invokeBlack([str(workspace.resolve())]) def test_single_file_force_pyi(self) -> None: - reg_mode = black.FileMode.AUTO_DETECT - pyi_mode = black.FileMode.PYI - contents, expected = read_data("force_pyi") + pyi_mode = replace(DEFAULT_MODE, is_pyi=True) + contents, expected = read_data("miscellaneous", "force_pyi") with cache_dir() as workspace: path = (workspace / "file.py").resolve() with open(path, "w") as fh: fh.write(contents) - result = CliRunner().invoke(black.main, [str(path), "--pyi"]) - self.assertEqual(result.exit_code, 0) + self.invokeBlack([str(path), "--pyi"]) with open(path, "r") as fh: actual = fh.read() # verify cache with --pyi is separate - pyi_cache = black.read_cache(black.DEFAULT_LINE_LENGTH, pyi_mode) - self.assertIn(path, pyi_cache) - normal_cache = black.read_cache(black.DEFAULT_LINE_LENGTH, reg_mode) - self.assertNotIn(path, normal_cache) - self.assertEqual(actual, expected) + pyi_cache = black.read_cache(pyi_mode) + self.assertIn(str(path), pyi_cache) + normal_cache = black.read_cache(DEFAULT_MODE) + self.assertNotIn(str(path), normal_cache) + self.assertFormatEqual(expected, actual) + black.assert_equivalent(contents, actual) + black.assert_stable(contents, actual, pyi_mode) - @event_loop(close=False) + @event_loop() def test_multi_file_force_pyi(self) -> None: - reg_mode = black.FileMode.AUTO_DETECT - pyi_mode = black.FileMode.PYI - contents, expected = read_data("force_pyi") + reg_mode = DEFAULT_MODE + pyi_mode = replace(DEFAULT_MODE, is_pyi=True) + contents, expected = read_data("miscellaneous", "force_pyi") with cache_dir() as workspace: paths = [ (workspace / "file1.py").resolve(), @@ -1005,50 +1023,50 @@ class BlackTestCase(unittest.TestCase): for path in paths: with open(path, "w") as fh: fh.write(contents) - result = CliRunner().invoke(black.main, [str(p) for p in paths] + ["--pyi"]) - self.assertEqual(result.exit_code, 0) + self.invokeBlack([str(p) for p in paths] + ["--pyi"]) for path in paths: with open(path, "r") as fh: actual = fh.read() self.assertEqual(actual, expected) # verify cache with --pyi is separate - pyi_cache = black.read_cache(black.DEFAULT_LINE_LENGTH, pyi_mode) - normal_cache = black.read_cache(black.DEFAULT_LINE_LENGTH, reg_mode) + pyi_cache = black.read_cache(pyi_mode) + normal_cache = black.read_cache(reg_mode) for path in paths: - self.assertIn(path, pyi_cache) - self.assertNotIn(path, normal_cache) + self.assertIn(str(path), pyi_cache) + self.assertNotIn(str(path), normal_cache) def test_pipe_force_pyi(self) -> None: - source, expected = read_data("force_pyi") - result = CliRunner().invoke(black.main, ["-", "-q", "--pyi"], input=source) + source, expected = read_data("miscellaneous", "force_pyi") + result = CliRunner().invoke( + black.main, ["-", "-q", "--pyi"], input=BytesIO(source.encode("utf8")) + ) self.assertEqual(result.exit_code, 0) actual = result.output self.assertFormatEqual(actual, expected) def test_single_file_force_py36(self) -> None: - reg_mode = black.FileMode.AUTO_DETECT - py36_mode = black.FileMode.PYTHON36 - source, expected = read_data("force_py36") + reg_mode = DEFAULT_MODE + py36_mode = replace(DEFAULT_MODE, target_versions=PY36_VERSIONS) + source, expected = read_data("miscellaneous", "force_py36") with cache_dir() as workspace: path = (workspace / "file.py").resolve() with open(path, "w") as fh: fh.write(source) - result = CliRunner().invoke(black.main, [str(path), "--py36"]) - self.assertEqual(result.exit_code, 0) + self.invokeBlack([str(path), *PY36_ARGS]) with open(path, "r") as fh: actual = fh.read() - # verify cache with --py36 is separate - py36_cache = black.read_cache(black.DEFAULT_LINE_LENGTH, py36_mode) - self.assertIn(path, py36_cache) - normal_cache = black.read_cache(black.DEFAULT_LINE_LENGTH, reg_mode) - self.assertNotIn(path, normal_cache) + # verify cache with --target-version is separate + py36_cache = black.read_cache(py36_mode) + self.assertIn(str(path), py36_cache) + normal_cache = black.read_cache(reg_mode) + self.assertNotIn(str(path), normal_cache) self.assertEqual(actual, expected) - @event_loop(close=False) + @event_loop() def test_multi_file_force_py36(self) -> None: - reg_mode = black.FileMode.AUTO_DETECT - py36_mode = black.FileMode.PYTHON36 - source, expected = read_data("force_py36") + reg_mode = DEFAULT_MODE + py36_mode = replace(DEFAULT_MODE, target_versions=PY36_VERSIONS) + source, expected = read_data("miscellaneous", "force_py36") with cache_dir() as workspace: paths = [ (workspace / "file1.py").resolve(), @@ -1057,49 +1075,948 @@ class BlackTestCase(unittest.TestCase): for path in paths: with open(path, "w") as fh: fh.write(source) - result = CliRunner().invoke( - black.main, [str(p) for p in paths] + ["--py36"] - ) - self.assertEqual(result.exit_code, 0) + self.invokeBlack([str(p) for p in paths] + PY36_ARGS) for path in paths: with open(path, "r") as fh: actual = fh.read() self.assertEqual(actual, expected) - # verify cache with --py36 is separate - pyi_cache = black.read_cache(black.DEFAULT_LINE_LENGTH, py36_mode) - normal_cache = black.read_cache(black.DEFAULT_LINE_LENGTH, reg_mode) + # verify cache with --target-version is separate + pyi_cache = black.read_cache(py36_mode) + normal_cache = black.read_cache(reg_mode) for path in paths: - self.assertIn(path, pyi_cache) - self.assertNotIn(path, normal_cache) + self.assertIn(str(path), pyi_cache) + self.assertNotIn(str(path), normal_cache) def test_pipe_force_py36(self) -> None: - source, expected = read_data("force_py36") - result = CliRunner().invoke(black.main, ["-", "-q", "--py36"], input=source) + source, expected = read_data("miscellaneous", "force_py36") + result = CliRunner().invoke( + black.main, + ["-", "-q", "--target-version=py36"], + input=BytesIO(source.encode("utf8")), + ) self.assertEqual(result.exit_code, 0) actual = result.output self.assertFormatEqual(actual, expected) + @pytest.mark.incompatible_with_mypyc + def test_reformat_one_with_stdin(self) -> None: + with patch( + "black.format_stdin_to_stdout", + return_value=lambda *args, **kwargs: black.Changed.YES, + ) as fsts: + report = MagicMock() + path = Path("-") + black.reformat_one( + path, + fast=True, + write_back=black.WriteBack.YES, + mode=DEFAULT_MODE, + report=report, + ) + fsts.assert_called_once() + report.done.assert_called_with(path, black.Changed.YES) + + @pytest.mark.incompatible_with_mypyc + def test_reformat_one_with_stdin_filename(self) -> None: + with patch( + "black.format_stdin_to_stdout", + return_value=lambda *args, **kwargs: black.Changed.YES, + ) as fsts: + report = MagicMock() + p = "foo.py" + path = Path(f"__BLACK_STDIN_FILENAME__{p}") + expected = Path(p) + black.reformat_one( + path, + fast=True, + write_back=black.WriteBack.YES, + mode=DEFAULT_MODE, + report=report, + ) + fsts.assert_called_once_with( + fast=True, write_back=black.WriteBack.YES, mode=DEFAULT_MODE + ) + # __BLACK_STDIN_FILENAME__ should have been stripped + report.done.assert_called_with(expected, black.Changed.YES) + + @pytest.mark.incompatible_with_mypyc + def test_reformat_one_with_stdin_filename_pyi(self) -> None: + with patch( + "black.format_stdin_to_stdout", + return_value=lambda *args, **kwargs: black.Changed.YES, + ) as fsts: + report = MagicMock() + p = "foo.pyi" + path = Path(f"__BLACK_STDIN_FILENAME__{p}") + expected = Path(p) + black.reformat_one( + path, + fast=True, + write_back=black.WriteBack.YES, + mode=DEFAULT_MODE, + report=report, + ) + fsts.assert_called_once_with( + fast=True, + write_back=black.WriteBack.YES, + mode=replace(DEFAULT_MODE, is_pyi=True), + ) + # __BLACK_STDIN_FILENAME__ should have been stripped + report.done.assert_called_with(expected, black.Changed.YES) + + @pytest.mark.incompatible_with_mypyc + def test_reformat_one_with_stdin_filename_ipynb(self) -> None: + with patch( + "black.format_stdin_to_stdout", + return_value=lambda *args, **kwargs: black.Changed.YES, + ) as fsts: + report = MagicMock() + p = "foo.ipynb" + path = Path(f"__BLACK_STDIN_FILENAME__{p}") + expected = Path(p) + black.reformat_one( + path, + fast=True, + write_back=black.WriteBack.YES, + mode=DEFAULT_MODE, + report=report, + ) + fsts.assert_called_once_with( + fast=True, + write_back=black.WriteBack.YES, + mode=replace(DEFAULT_MODE, is_ipynb=True), + ) + # __BLACK_STDIN_FILENAME__ should have been stripped + report.done.assert_called_with(expected, black.Changed.YES) + + @pytest.mark.incompatible_with_mypyc + def test_reformat_one_with_stdin_and_existing_path(self) -> None: + with patch( + "black.format_stdin_to_stdout", + return_value=lambda *args, **kwargs: black.Changed.YES, + ) as fsts: + report = MagicMock() + # Even with an existing file, since we are forcing stdin, black + # should output to stdout and not modify the file inplace + p = THIS_DIR / "data" / "simple_cases" / "collections.py" + # Make sure is_file actually returns True + self.assertTrue(p.is_file()) + path = Path(f"__BLACK_STDIN_FILENAME__{p}") + expected = Path(p) + black.reformat_one( + path, + fast=True, + write_back=black.WriteBack.YES, + mode=DEFAULT_MODE, + report=report, + ) + fsts.assert_called_once() + # __BLACK_STDIN_FILENAME__ should have been stripped + report.done.assert_called_with(expected, black.Changed.YES) + + def test_reformat_one_with_stdin_empty(self) -> None: + output = io.StringIO() + with patch("io.TextIOWrapper", lambda *args, **kwargs: output): + try: + black.format_stdin_to_stdout( + fast=True, + content="", + write_back=black.WriteBack.YES, + mode=DEFAULT_MODE, + ) + except io.UnsupportedOperation: + pass # StringIO does not support detach + assert output.getvalue() == "" + + def test_invalid_cli_regex(self) -> None: + for option in ["--include", "--exclude", "--extend-exclude", "--force-exclude"]: + self.invokeBlack(["-", option, "**()(!!*)"], exit_code=2) + + def test_required_version_matches_version(self) -> None: + self.invokeBlack( + ["--required-version", black.__version__, "-c", "0"], + exit_code=0, + ignore_config=True, + ) + + def test_required_version_matches_partial_version(self) -> None: + self.invokeBlack( + ["--required-version", black.__version__.split(".")[0], "-c", "0"], + exit_code=0, + ignore_config=True, + ) + + def test_required_version_does_not_match_on_minor_version(self) -> None: + self.invokeBlack( + ["--required-version", black.__version__.split(".")[0] + ".999", "-c", "0"], + exit_code=1, + ignore_config=True, + ) + + def test_required_version_does_not_match_version(self) -> None: + result = BlackRunner().invoke( + black.main, + ["--required-version", "20.99b", "-c", "0"], + ) + self.assertEqual(result.exit_code, 1) + self.assertIn("required version", result.stderr) + + def test_preserves_line_endings(self) -> None: + with TemporaryDirectory() as workspace: + test_file = Path(workspace) / "test.py" + for nl in ["\n", "\r\n"]: + contents = nl.join(["def f( ):", " pass"]) + test_file.write_bytes(contents.encode()) + ff(test_file, write_back=black.WriteBack.YES) + updated_contents: bytes = test_file.read_bytes() + self.assertIn(nl.encode(), updated_contents) + if nl == "\n": + self.assertNotIn(b"\r\n", updated_contents) + + def test_preserves_line_endings_via_stdin(self) -> None: + for nl in ["\n", "\r\n"]: + contents = nl.join(["def f( ):", " pass"]) + runner = BlackRunner() + result = runner.invoke( + black.main, ["-", "--fast"], input=BytesIO(contents.encode("utf8")) + ) + self.assertEqual(result.exit_code, 0) + output = result.stdout_bytes + self.assertIn(nl.encode("utf8"), output) + if nl == "\n": + self.assertNotIn(b"\r\n", output) + + def test_assert_equivalent_different_asts(self) -> None: + with self.assertRaises(AssertionError): + black.assert_equivalent("{}", "None") + + def test_shhh_click(self) -> None: + try: + from click import _unicodefun # type: ignore + except ImportError: + self.skipTest("Incompatible Click version") + + if not hasattr(_unicodefun, "_verify_python_env"): + self.skipTest("Incompatible Click version") + + # First, let's see if Click is crashing with a preferred ASCII charset. + with patch("locale.getpreferredencoding") as gpe: + gpe.return_value = "ASCII" + with self.assertRaises(RuntimeError): + _unicodefun._verify_python_env() + # Now, let's silence Click... + black.patch_click() + # ...and confirm it's silent. + with patch("locale.getpreferredencoding") as gpe: + gpe.return_value = "ASCII" + try: + _unicodefun._verify_python_env() + except RuntimeError as re: + self.fail(f"`patch_click()` failed, exception still raised: {re}") + + def test_root_logger_not_used_directly(self) -> None: + def fail(*args: Any, **kwargs: Any) -> None: + self.fail("Record created with root logger") + + with patch.multiple( + logging.root, + debug=fail, + info=fail, + warning=fail, + error=fail, + critical=fail, + log=fail, + ): + ff(THIS_DIR / "util.py") + + def test_invalid_config_return_code(self) -> None: + tmp_file = Path(black.dump_to_file()) + try: + tmp_config = Path(black.dump_to_file()) + tmp_config.unlink() + args = ["--config", str(tmp_config), str(tmp_file)] + self.invokeBlack(args, exit_code=2, ignore_config=False) + finally: + tmp_file.unlink() + + def test_parse_pyproject_toml(self) -> None: + test_toml_file = THIS_DIR / "test.toml" + config = black.parse_pyproject_toml(str(test_toml_file)) + self.assertEqual(config["verbose"], 1) + self.assertEqual(config["check"], "no") + self.assertEqual(config["diff"], "y") + self.assertEqual(config["color"], True) + self.assertEqual(config["line_length"], 79) + self.assertEqual(config["target_version"], ["py36", "py37", "py38"]) + self.assertEqual(config["python_cell_magics"], ["custom1", "custom2"]) + self.assertEqual(config["exclude"], r"\.pyi?$") + self.assertEqual(config["include"], r"\.py?$") + + def test_read_pyproject_toml(self) -> None: + test_toml_file = THIS_DIR / "test.toml" + fake_ctx = FakeContext() + black.read_pyproject_toml(fake_ctx, FakeParameter(), str(test_toml_file)) + config = fake_ctx.default_map + self.assertEqual(config["verbose"], "1") + self.assertEqual(config["check"], "no") + self.assertEqual(config["diff"], "y") + self.assertEqual(config["color"], "True") + self.assertEqual(config["line_length"], "79") + self.assertEqual(config["target_version"], ["py36", "py37", "py38"]) + self.assertEqual(config["exclude"], r"\.pyi?$") + self.assertEqual(config["include"], r"\.py?$") + + @pytest.mark.incompatible_with_mypyc + def test_find_project_root(self) -> None: + with TemporaryDirectory() as workspace: + root = Path(workspace) + test_dir = root / "test" + test_dir.mkdir() + + src_dir = root / "src" + src_dir.mkdir() + + root_pyproject = root / "pyproject.toml" + root_pyproject.touch() + src_pyproject = src_dir / "pyproject.toml" + src_pyproject.touch() + src_python = src_dir / "foo.py" + src_python.touch() + + self.assertEqual( + black.find_project_root((src_dir, test_dir)), + (root.resolve(), "pyproject.toml"), + ) + self.assertEqual( + black.find_project_root((src_dir,)), + (src_dir.resolve(), "pyproject.toml"), + ) + self.assertEqual( + black.find_project_root((src_python,)), + (src_dir.resolve(), "pyproject.toml"), + ) + + with change_directory(test_dir): + self.assertEqual( + black.find_project_root(("-",), stdin_filename="../src/a.py"), + (src_dir.resolve(), "pyproject.toml"), + ) + + @patch( + "black.files.find_user_pyproject_toml", + ) + def test_find_pyproject_toml(self, find_user_pyproject_toml: MagicMock) -> None: + find_user_pyproject_toml.side_effect = RuntimeError() + + with redirect_stderr(io.StringIO()) as stderr: + result = black.files.find_pyproject_toml( + path_search_start=(str(Path.cwd().root),) + ) + + assert result is None + err = stderr.getvalue() + assert "Ignoring user configuration" in err + + @patch( + "black.files.find_user_pyproject_toml", + black.files.find_user_pyproject_toml.__wrapped__, + ) + def test_find_user_pyproject_toml_linux(self) -> None: + if system() == "Windows": + return + + # Test if XDG_CONFIG_HOME is checked + with TemporaryDirectory() as workspace: + tmp_user_config = Path(workspace) / "black" + with patch.dict("os.environ", {"XDG_CONFIG_HOME": workspace}): + self.assertEqual( + black.files.find_user_pyproject_toml(), tmp_user_config.resolve() + ) + + # Test fallback for XDG_CONFIG_HOME + with patch.dict("os.environ"): + os.environ.pop("XDG_CONFIG_HOME", None) + fallback_user_config = Path("~/.config").expanduser() / "black" + self.assertEqual( + black.files.find_user_pyproject_toml(), fallback_user_config.resolve() + ) + + def test_find_user_pyproject_toml_windows(self) -> None: + if system() != "Windows": + return + + user_config_path = Path.home() / ".black" + self.assertEqual( + black.files.find_user_pyproject_toml(), user_config_path.resolve() + ) + + def test_bpo_33660_workaround(self) -> None: + if system() == "Windows": + return + + # https://bugs.python.org/issue33660 + root = Path("/") + with change_directory(root): + path = Path("workspace") / "project" + report = black.Report(verbose=True) + normalized_path = black.normalize_path_maybe_ignore(path, root, report) + self.assertEqual(normalized_path, "workspace/project") + + def test_normalize_path_ignore_windows_junctions_outside_of_root(self) -> None: + if system() != "Windows": + return + + with TemporaryDirectory() as workspace: + root = Path(workspace) + junction_dir = root / "junction" + junction_target_outside_of_root = root / ".." + os.system(f"mklink /J {junction_dir} {junction_target_outside_of_root}") + + report = black.Report(verbose=True) + normalized_path = black.normalize_path_maybe_ignore( + junction_dir, root, report + ) + # Manually delete for Python < 3.8 + os.system(f"rmdir {junction_dir}") + + self.assertEqual(normalized_path, None) + + def test_newline_comment_interaction(self) -> None: + source = "class A:\\\r\n# type: ignore\n pass\n" + output = black.format_str(source, mode=DEFAULT_MODE) + black.assert_stable(source, output, mode=DEFAULT_MODE) + + def test_bpo_2142_workaround(self) -> None: + # https://bugs.python.org/issue2142 + + source, _ = read_data("miscellaneous", "missing_final_newline") + # read_data adds a trailing newline + source = source.rstrip() + expected, _ = read_data("miscellaneous", "missing_final_newline.diff") + tmp_file = Path(black.dump_to_file(source, ensure_final_newline=False)) + diff_header = re.compile( + rf"{re.escape(str(tmp_file))}\t\d\d\d\d-\d\d-\d\d " + r"\d\d:\d\d:\d\d\.\d\d\d\d\d\d \+\d\d\d\d" + ) + try: + result = BlackRunner().invoke(black.main, ["--diff", str(tmp_file)]) + self.assertEqual(result.exit_code, 0) + finally: + os.unlink(tmp_file) + actual = result.output + actual = diff_header.sub(DETERMINISTIC_HEADER, actual) + self.assertEqual(actual, expected) + + @staticmethod + def compare_results( + result: click.testing.Result, expected_value: str, expected_exit_code: int + ) -> None: + """Helper method to test the value and exit code of a click Result.""" + assert ( + result.output == expected_value + ), "The output did not match the expected value." + assert result.exit_code == expected_exit_code, "The exit code is incorrect." + + def test_code_option(self) -> None: + """Test the code option with no changes.""" + code = 'print("Hello world")\n' + args = ["--code", code] + result = CliRunner().invoke(black.main, args) + + self.compare_results(result, code, 0) + + def test_code_option_changed(self) -> None: + """Test the code option when changes are required.""" + code = "print('hello world')" + formatted = black.format_str(code, mode=DEFAULT_MODE) + + args = ["--code", code] + result = CliRunner().invoke(black.main, args) + + self.compare_results(result, formatted, 0) + + def test_code_option_check(self) -> None: + """Test the code option when check is passed.""" + args = ["--check", "--code", 'print("Hello world")\n'] + result = CliRunner().invoke(black.main, args) + self.compare_results(result, "", 0) + + def test_code_option_check_changed(self) -> None: + """Test the code option when changes are required, and check is passed.""" + args = ["--check", "--code", "print('hello world')"] + result = CliRunner().invoke(black.main, args) + self.compare_results(result, "", 1) + + def test_code_option_diff(self) -> None: + """Test the code option when diff is passed.""" + code = "print('hello world')" + formatted = black.format_str(code, mode=DEFAULT_MODE) + result_diff = diff(code, formatted, "STDIN", "STDOUT") + + args = ["--diff", "--code", code] + result = CliRunner().invoke(black.main, args) + + # Remove time from diff + output = DIFF_TIME.sub("", result.output) + + assert output == result_diff, "The output did not match the expected value." + assert result.exit_code == 0, "The exit code is incorrect." + + def test_code_option_color_diff(self) -> None: + """Test the code option when color and diff are passed.""" + code = "print('hello world')" + formatted = black.format_str(code, mode=DEFAULT_MODE) + + result_diff = diff(code, formatted, "STDIN", "STDOUT") + result_diff = color_diff(result_diff) + + args = ["--diff", "--color", "--code", code] + result = CliRunner().invoke(black.main, args) + + # Remove time from diff + output = DIFF_TIME.sub("", result.output) + + assert output == result_diff, "The output did not match the expected value." + assert result.exit_code == 0, "The exit code is incorrect." + + @pytest.mark.incompatible_with_mypyc + def test_code_option_safe(self) -> None: + """Test that the code option throws an error when the sanity checks fail.""" + # Patch black.assert_equivalent to ensure the sanity checks fail + with patch.object(black, "assert_equivalent", side_effect=AssertionError): + code = 'print("Hello world")' + error_msg = f"{code}\nerror: cannot format : \n" + + args = ["--safe", "--code", code] + result = CliRunner().invoke(black.main, args) + + self.compare_results(result, error_msg, 123) + + def test_code_option_fast(self) -> None: + """Test that the code option ignores errors when the sanity checks fail.""" + # Patch black.assert_equivalent to ensure the sanity checks fail + with patch.object(black, "assert_equivalent", side_effect=AssertionError): + code = 'print("Hello world")' + formatted = black.format_str(code, mode=DEFAULT_MODE) + + args = ["--fast", "--code", code] + result = CliRunner().invoke(black.main, args) + + self.compare_results(result, formatted, 0) + + @pytest.mark.incompatible_with_mypyc + def test_code_option_config(self) -> None: + """ + Test that the code option finds the pyproject.toml in the current directory. + """ + with patch.object(black, "parse_pyproject_toml", return_value={}) as parse: + args = ["--code", "print"] + # This is the only directory known to contain a pyproject.toml + with change_directory(PROJECT_ROOT): + CliRunner().invoke(black.main, args) + pyproject_path = Path(Path.cwd(), "pyproject.toml").resolve() + + assert ( + len(parse.mock_calls) >= 1 + ), "Expected config parse to be called with the current directory." + + _, call_args, _ = parse.mock_calls[0] + assert ( + call_args[0].lower() == str(pyproject_path).lower() + ), "Incorrect config loaded." + + @pytest.mark.incompatible_with_mypyc + def test_code_option_parent_config(self) -> None: + """ + Test that the code option finds the pyproject.toml in the parent directory. + """ + with patch.object(black, "parse_pyproject_toml", return_value={}) as parse: + with change_directory(THIS_DIR): + args = ["--code", "print"] + CliRunner().invoke(black.main, args) + + pyproject_path = Path(Path().cwd().parent, "pyproject.toml").resolve() + assert ( + len(parse.mock_calls) >= 1 + ), "Expected config parse to be called with the current directory." + + _, call_args, _ = parse.mock_calls[0] + assert ( + call_args[0].lower() == str(pyproject_path).lower() + ), "Incorrect config loaded." + + def test_for_handled_unexpected_eof_error(self) -> None: + """ + Test that an unexpected EOF SyntaxError is nicely presented. + """ + with pytest.raises(black.parsing.InvalidInput) as exc_info: + black.lib2to3_parse("print(", {}) + + exc_info.match("Cannot parse: 2:0: EOF in multi-line statement") + + def test_equivalency_ast_parse_failure_includes_error(self) -> None: + with pytest.raises(AssertionError) as err: + black.assert_equivalent("a«»a = 1", "a«»a = 1") + + err.match("--safe") + # Unfortunately the SyntaxError message has changed in newer versions so we + # can't match it directly. + err.match("invalid character") + err.match(r"\(, line 1\)") + + +class TestCaching: + def test_get_cache_dir( + self, + tmp_path: Path, + monkeypatch: pytest.MonkeyPatch, + ) -> None: + # Create multiple cache directories + workspace1 = tmp_path / "ws1" + workspace1.mkdir() + workspace2 = tmp_path / "ws2" + workspace2.mkdir() + + # Force user_cache_dir to use the temporary directory for easier assertions + patch_user_cache_dir = patch( + target="black.cache.user_cache_dir", + autospec=True, + return_value=str(workspace1), + ) + + # If BLACK_CACHE_DIR is not set, use user_cache_dir + monkeypatch.delenv("BLACK_CACHE_DIR", raising=False) + with patch_user_cache_dir: + assert get_cache_dir() == workspace1 + + # If it is set, use the path provided in the env var. + monkeypatch.setenv("BLACK_CACHE_DIR", str(workspace2)) + assert get_cache_dir() == workspace2 + + def test_cache_broken_file(self) -> None: + mode = DEFAULT_MODE + with cache_dir() as workspace: + cache_file = get_cache_file(mode) + cache_file.write_text("this is not a pickle") + assert black.read_cache(mode) == {} + src = (workspace / "test.py").resolve() + src.write_text("print('hello')") + invokeBlack([str(src)]) + cache = black.read_cache(mode) + assert str(src) in cache + + def test_cache_single_file_already_cached(self) -> None: + mode = DEFAULT_MODE + with cache_dir() as workspace: + src = (workspace / "test.py").resolve() + src.write_text("print('hello')") + black.write_cache({}, [src], mode) + invokeBlack([str(src)]) + assert src.read_text() == "print('hello')" + + @event_loop() + def test_cache_multiple_files(self) -> None: + mode = DEFAULT_MODE + with cache_dir() as workspace, patch( + "concurrent.futures.ProcessPoolExecutor", new=ThreadPoolExecutor + ): + one = (workspace / "one.py").resolve() + with one.open("w") as fobj: + fobj.write("print('hello')") + two = (workspace / "two.py").resolve() + with two.open("w") as fobj: + fobj.write("print('hello')") + black.write_cache({}, [one], mode) + invokeBlack([str(workspace)]) + with one.open("r") as fobj: + assert fobj.read() == "print('hello')" + with two.open("r") as fobj: + assert fobj.read() == 'print("hello")\n' + cache = black.read_cache(mode) + assert str(one) in cache + assert str(two) in cache + + @pytest.mark.parametrize("color", [False, True], ids=["no-color", "with-color"]) + def test_no_cache_when_writeback_diff(self, color: bool) -> None: + mode = DEFAULT_MODE + with cache_dir() as workspace: + src = (workspace / "test.py").resolve() + with src.open("w") as fobj: + fobj.write("print('hello')") + with patch("black.read_cache") as read_cache, patch( + "black.write_cache" + ) as write_cache: + cmd = [str(src), "--diff"] + if color: + cmd.append("--color") + invokeBlack(cmd) + cache_file = get_cache_file(mode) + assert cache_file.exists() is False + write_cache.assert_not_called() + read_cache.assert_not_called() + + @pytest.mark.parametrize("color", [False, True], ids=["no-color", "with-color"]) + @event_loop() + def test_output_locking_when_writeback_diff(self, color: bool) -> None: + with cache_dir() as workspace: + for tag in range(0, 4): + src = (workspace / f"test{tag}.py").resolve() + with src.open("w") as fobj: + fobj.write("print('hello')") + with patch( + "black.concurrency.Manager", wraps=multiprocessing.Manager + ) as mgr: + cmd = ["--diff", str(workspace)] + if color: + cmd.append("--color") + invokeBlack(cmd, exit_code=0) + # this isn't quite doing what we want, but if it _isn't_ + # called then we cannot be using the lock it provides + mgr.assert_called() + + def test_no_cache_when_stdin(self) -> None: + mode = DEFAULT_MODE + with cache_dir(): + result = CliRunner().invoke( + black.main, ["-"], input=BytesIO(b"print('hello')") + ) + assert not result.exit_code + cache_file = get_cache_file(mode) + assert not cache_file.exists() + + def test_read_cache_no_cachefile(self) -> None: + mode = DEFAULT_MODE + with cache_dir(): + assert black.read_cache(mode) == {} + + def test_write_cache_read_cache(self) -> None: + mode = DEFAULT_MODE + with cache_dir() as workspace: + src = (workspace / "test.py").resolve() + src.touch() + black.write_cache({}, [src], mode) + cache = black.read_cache(mode) + assert str(src) in cache + assert cache[str(src)] == black.get_cache_info(src) + + def test_filter_cached(self) -> None: + with TemporaryDirectory() as workspace: + path = Path(workspace) + uncached = (path / "uncached").resolve() + cached = (path / "cached").resolve() + cached_but_changed = (path / "changed").resolve() + uncached.touch() + cached.touch() + cached_but_changed.touch() + cache = { + str(cached): black.get_cache_info(cached), + str(cached_but_changed): (0.0, 0), + } + todo, done = black.cache.filter_cached( + cache, {uncached, cached, cached_but_changed} + ) + assert todo == {uncached, cached_but_changed} + assert done == {cached} + + def test_write_cache_creates_directory_if_needed(self) -> None: + mode = DEFAULT_MODE + with cache_dir(exists=False) as workspace: + assert not workspace.exists() + black.write_cache({}, [], mode) + assert workspace.exists() + + @event_loop() + def test_failed_formatting_does_not_get_cached(self) -> None: + mode = DEFAULT_MODE + with cache_dir() as workspace, patch( + "concurrent.futures.ProcessPoolExecutor", new=ThreadPoolExecutor + ): + failing = (workspace / "failing.py").resolve() + with failing.open("w") as fobj: + fobj.write("not actually python") + clean = (workspace / "clean.py").resolve() + with clean.open("w") as fobj: + fobj.write('print("hello")\n') + invokeBlack([str(workspace)], exit_code=123) + cache = black.read_cache(mode) + assert str(failing) not in cache + assert str(clean) in cache + + def test_write_cache_write_fail(self) -> None: + mode = DEFAULT_MODE + with cache_dir(), patch.object(Path, "open") as mock: + mock.side_effect = OSError + black.write_cache({}, [], mode) + + def test_read_cache_line_lengths(self) -> None: + mode = DEFAULT_MODE + short_mode = replace(DEFAULT_MODE, line_length=1) + with cache_dir() as workspace: + path = (workspace / "file.py").resolve() + path.touch() + black.write_cache({}, [path], mode) + one = black.read_cache(mode) + assert str(path) in one + two = black.read_cache(short_mode) + assert str(path) not in two + + +def assert_collected_sources( + src: Sequence[Union[str, Path]], + expected: Sequence[Union[str, Path]], + *, + ctx: Optional[FakeContext] = None, + exclude: Optional[str] = None, + include: Optional[str] = None, + extend_exclude: Optional[str] = None, + force_exclude: Optional[str] = None, + stdin_filename: Optional[str] = None, +) -> None: + gs_src = tuple(str(Path(s)) for s in src) + gs_expected = [Path(s) for s in expected] + gs_exclude = None if exclude is None else compile_pattern(exclude) + gs_include = DEFAULT_INCLUDE if include is None else compile_pattern(include) + gs_extend_exclude = ( + None if extend_exclude is None else compile_pattern(extend_exclude) + ) + gs_force_exclude = None if force_exclude is None else compile_pattern(force_exclude) + collected = black.get_sources( + ctx=ctx or FakeContext(), + src=gs_src, + quiet=False, + verbose=False, + include=gs_include, + exclude=gs_exclude, + extend_exclude=gs_extend_exclude, + force_exclude=gs_force_exclude, + report=black.Report(), + stdin_filename=stdin_filename, + ) + assert sorted(collected) == sorted(gs_expected) + + +class TestFileCollection: def test_include_exclude(self) -> None: - path = THIS_DIR / "include_exclude_tests" + path = THIS_DIR / "data" / "include_exclude_tests" + src = [path] + expected = [ + Path(path / "b/dont_exclude/a.py"), + Path(path / "b/dont_exclude/a.pyi"), + ] + assert_collected_sources( + src, + expected, + include=r"\.pyi?$", + exclude=r"/exclude/|/\.definitely_exclude/", + ) + + def test_gitignore_used_as_default(self) -> None: + base = Path(DATA_DIR / "include_exclude_tests") + expected = [ + base / "b/.definitely_exclude/a.py", + base / "b/.definitely_exclude/a.pyi", + ] + src = [base / "b/"] + ctx = FakeContext() + ctx.obj["root"] = base + assert_collected_sources(src, expected, ctx=ctx, extend_exclude=r"/exclude/") + + @patch("black.find_project_root", lambda *args: (THIS_DIR.resolve(), None)) + def test_exclude_for_issue_1572(self) -> None: + # Exclude shouldn't touch files that were explicitly given to Black through the + # CLI. Exclude is supposed to only apply to the recursive discovery of files. + # https://github.com/psf/black/issues/1572 + path = DATA_DIR / "include_exclude_tests" + src = [path / "b/exclude/a.py"] + expected = [path / "b/exclude/a.py"] + assert_collected_sources(src, expected, include="", exclude=r"/exclude/|a\.py") + + def test_gitignore_exclude(self) -> None: + path = THIS_DIR / "data" / "include_exclude_tests" include = re.compile(r"\.pyi?$") - exclude = re.compile(r"/exclude/|/\.definitely_exclude/") + exclude = re.compile(r"") report = black.Report() + gitignore = PathSpec.from_lines( + "gitwildmatch", ["exclude/", ".definitely_exclude"] + ) sources: List[Path] = [] expected = [ - Path(THIS_DIR / "include_exclude_tests/b/dont_exclude/a.py"), - Path(THIS_DIR / "include_exclude_tests/b/dont_exclude/a.pyi"), + Path(path / "b/dont_exclude/a.py"), + Path(path / "b/dont_exclude/a.pyi"), ] this_abs = THIS_DIR.resolve() sources.extend( - black.gen_python_files_in_dir(path, this_abs, include, exclude, report) + black.gen_python_files( + path.iterdir(), + this_abs, + include, + exclude, + None, + None, + report, + gitignore, + verbose=False, + quiet=False, + ) ) - self.assertEqual(sorted(expected), sorted(sources)) + assert sorted(expected) == sorted(sources) - def test_empty_include(self) -> None: - path = THIS_DIR / "include_exclude_tests" + def test_nested_gitignore(self) -> None: + path = Path(THIS_DIR / "data" / "nested_gitignore_tests") + include = re.compile(r"\.pyi?$") + exclude = re.compile(r"") + root_gitignore = black.files.get_gitignore(path) report = black.Report() - empty = re.compile(r"") - sources: List[Path] = [] + expected: List[Path] = [ + Path(path / "x.py"), + Path(path / "root/b.py"), + Path(path / "root/c.py"), + Path(path / "root/child/c.py"), + ] + this_abs = THIS_DIR.resolve() + sources = list( + black.gen_python_files( + path.iterdir(), + this_abs, + include, + exclude, + None, + None, + report, + root_gitignore, + verbose=False, + quiet=False, + ) + ) + assert sorted(expected) == sorted(sources) + + def test_invalid_gitignore(self) -> None: + path = THIS_DIR / "data" / "invalid_gitignore_tests" + empty_config = path / "pyproject.toml" + result = BlackRunner().invoke( + black.main, ["--verbose", "--config", str(empty_config), str(path)] + ) + assert result.exit_code == 1 + assert result.stderr_bytes is not None + + gitignore = path / ".gitignore" + assert f"Could not parse {gitignore}" in result.stderr_bytes.decode() + + def test_invalid_nested_gitignore(self) -> None: + path = THIS_DIR / "data" / "invalid_nested_gitignore_tests" + empty_config = path / "pyproject.toml" + result = BlackRunner().invoke( + black.main, ["--verbose", "--config", str(empty_config), str(path)] + ) + assert result.exit_code == 1 + assert result.stderr_bytes is not None + + gitignore = path / "a" / ".gitignore" + assert f"Could not parse {gitignore}" in result.stderr_bytes.decode() + + def test_empty_include(self) -> None: + path = DATA_DIR / "include_exclude_tests" + src = [path] expected = [ Path(path / "b/exclude/a.pie"), Path(path / "b/exclude/a.py"), @@ -1110,57 +2027,148 @@ class BlackTestCase(unittest.TestCase): Path(path / "b/.definitely_exclude/a.pie"), Path(path / "b/.definitely_exclude/a.py"), Path(path / "b/.definitely_exclude/a.pyi"), + Path(path / ".gitignore"), + Path(path / "pyproject.toml"), ] - this_abs = THIS_DIR.resolve() - sources.extend( - black.gen_python_files_in_dir( - path, this_abs, empty, re.compile(black.DEFAULT_EXCLUDES), report - ) - ) - self.assertEqual(sorted(expected), sorted(sources)) + # Setting exclude explicitly to an empty string to block .gitignore usage. + assert_collected_sources(src, expected, include="", exclude="") - def test_empty_exclude(self) -> None: - path = THIS_DIR / "include_exclude_tests" - report = black.Report() - empty = re.compile(r"") - sources: List[Path] = [] + def test_extend_exclude(self) -> None: + path = DATA_DIR / "include_exclude_tests" + src = [path] expected = [ - Path(path / "b/dont_exclude/a.py"), - Path(path / "b/dont_exclude/a.pyi"), Path(path / "b/exclude/a.py"), - Path(path / "b/exclude/a.pyi"), - Path(path / "b/.definitely_exclude/a.py"), - Path(path / "b/.definitely_exclude/a.pyi"), + Path(path / "b/dont_exclude/a.py"), ] - this_abs = THIS_DIR.resolve() - sources.extend( - black.gen_python_files_in_dir( - path, this_abs, re.compile(black.DEFAULT_INCLUDES), empty, report + assert_collected_sources( + src, expected, exclude=r"\.pyi$", extend_exclude=r"\.definitely_exclude" + ) + + @pytest.mark.incompatible_with_mypyc + def test_symlink_out_of_root_directory(self) -> None: + path = MagicMock() + root = THIS_DIR.resolve() + child = MagicMock() + include = re.compile(black.DEFAULT_INCLUDES) + exclude = re.compile(black.DEFAULT_EXCLUDES) + report = black.Report() + gitignore = PathSpec.from_lines("gitwildmatch", []) + # `child` should behave like a symlink which resolved path is clearly + # outside of the `root` directory. + path.iterdir.return_value = [child] + child.resolve.return_value = Path("/a/b/c") + child.as_posix.return_value = "/a/b/c" + try: + list( + black.gen_python_files( + path.iterdir(), + root, + include, + exclude, + None, + None, + report, + gitignore, + verbose=False, + quiet=False, + ) ) + except ValueError as ve: + pytest.fail(f"`get_python_files_in_dir()` failed: {ve}") + path.iterdir.assert_called_once() + child.resolve.assert_called_once() + + @patch("black.find_project_root", lambda *args: (THIS_DIR.resolve(), None)) + def test_get_sources_with_stdin(self) -> None: + src = ["-"] + expected = ["-"] + assert_collected_sources(src, expected, include="", exclude=r"/exclude/|a\.py") + + @patch("black.find_project_root", lambda *args: (THIS_DIR.resolve(), None)) + def test_get_sources_with_stdin_filename(self) -> None: + src = ["-"] + stdin_filename = str(THIS_DIR / "data/collections.py") + expected = [f"__BLACK_STDIN_FILENAME__{stdin_filename}"] + assert_collected_sources( + src, + expected, + exclude=r"/exclude/a\.py", + stdin_filename=stdin_filename, ) - self.assertEqual(sorted(expected), sorted(sources)) - def test_invalid_include_exclude(self) -> None: - for option in ["--include", "--exclude"]: - result = CliRunner().invoke(black.main, ["-", option, "**()(!!*)"]) - self.assertEqual(result.exit_code, 2) + @patch("black.find_project_root", lambda *args: (THIS_DIR.resolve(), None)) + def test_get_sources_with_stdin_filename_and_exclude(self) -> None: + # Exclude shouldn't exclude stdin_filename since it is mimicking the + # file being passed directly. This is the same as + # test_exclude_for_issue_1572 + path = DATA_DIR / "include_exclude_tests" + src = ["-"] + stdin_filename = str(path / "b/exclude/a.py") + expected = [f"__BLACK_STDIN_FILENAME__{stdin_filename}"] + assert_collected_sources( + src, + expected, + exclude=r"/exclude/|a\.py", + stdin_filename=stdin_filename, + ) - def test_preserves_line_endings(self) -> None: - with TemporaryDirectory() as workspace: - test_file = Path(workspace) / "test.py" - for nl in ["\n", "\r\n"]: - contents = nl.join(["def f( ):", " pass"]) - test_file.write_bytes(contents.encode()) - ff(test_file, write_back=black.WriteBack.YES) - updated_contents: bytes = test_file.read_bytes() - self.assertIn(nl.encode(), updated_contents) # type: ignore - if nl == "\n": - self.assertNotIn(b"\r\n", updated_contents) # type: ignore + @patch("black.find_project_root", lambda *args: (THIS_DIR.resolve(), None)) + def test_get_sources_with_stdin_filename_and_extend_exclude(self) -> None: + # Extend exclude shouldn't exclude stdin_filename since it is mimicking the + # file being passed directly. This is the same as + # test_exclude_for_issue_1572 + src = ["-"] + path = THIS_DIR / "data" / "include_exclude_tests" + stdin_filename = str(path / "b/exclude/a.py") + expected = [f"__BLACK_STDIN_FILENAME__{stdin_filename}"] + assert_collected_sources( + src, + expected, + extend_exclude=r"/exclude/|a\.py", + stdin_filename=stdin_filename, + ) - def test_assert_equivalent_different_asts(self) -> None: - with self.assertRaises(AssertionError): - black.assert_equivalent("{}", "None") + @patch("black.find_project_root", lambda *args: (THIS_DIR.resolve(), None)) + def test_get_sources_with_stdin_filename_and_force_exclude(self) -> None: + # Force exclude should exclude the file when passing it through + # stdin_filename + path = THIS_DIR / "data" / "include_exclude_tests" + stdin_filename = str(path / "b/exclude/a.py") + assert_collected_sources( + src=["-"], + expected=[], + force_exclude=r"/exclude/|a\.py", + stdin_filename=stdin_filename, + ) -if __name__ == "__main__": - unittest.main() +try: + with open(black.__file__, "r", encoding="utf-8") as _bf: + black_source_lines = _bf.readlines() +except UnicodeDecodeError: + if not black.COMPILED: + raise + + +def tracefunc( + frame: types.FrameType, event: str, arg: Any +) -> Callable[[types.FrameType, str, Any], Any]: + """Show function calls `from black/__init__.py` as they happen. + + Register this with `sys.settrace()` in a test you're debugging. + """ + if event != "call": + return tracefunc + + stack = len(inspect.stack()) - 19 + stack *= 2 + filename = frame.f_code.co_filename + lineno = frame.f_lineno + func_sig_lineno = lineno - 1 + funcname = black_source_lines[func_sig_lineno].strip() + while funcname.startswith("@"): + func_sig_lineno += 1 + funcname = black_source_lines[func_sig_lineno].strip() + if "black/__init__.py" in filename: + print(f"{' ' * stack}{lineno}:{funcname}") + return tracefunc