X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/401836d02eb7516829fe1f84ca10791d04606f01..51141f1af4aab0e0c7f71932ffe06482a884f1d5:/tests/test_black.py?ds=sidebyside diff --git a/tests/test_black.py b/tests/test_black.py index 421e871..a2efef8 100644 --- a/tests/test_black.py +++ b/tests/test_black.py @@ -1,57 +1,65 @@ #!/usr/bin/env python3 +import multiprocessing import asyncio +import logging from concurrent.futures import ThreadPoolExecutor from contextlib import contextmanager -from functools import partial +from dataclasses import replace +import inspect from io import BytesIO, TextIOWrapper import os from pathlib import Path -import re +from platform import system +import regex as re import sys from tempfile import TemporaryDirectory -from typing import Any, BinaryIO, Generator, List, Tuple, Iterator +import types +from typing import ( + Any, + BinaryIO, + Callable, + Dict, + Generator, + List, + Iterator, + TypeVar, +) import unittest from unittest.mock import patch, MagicMock +import click from click import unstyle from click.testing import CliRunner import black +from black import Feature, TargetVersion +from pathspec import PathSpec -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" +# Import other test classes +from tests.util import ( + THIS_DIR, + read_data, + DETERMINISTIC_HEADER, + BlackBaseTestCase, + DEFAULT_MODE, + fs, + ff, + dump_to_stderr, +) +from .test_primer import PrimerCLITests # noqa: F401 -def read_data(name: str, data: bool = True) -> 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] = [] - base_dir = THIS_DIR / "data" if data else THIS_DIR - with open(base_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" +THIS_FILE = Path(__file__) +PY36_VERSIONS = { + TargetVersion.PY36, + TargetVersion.PY37, + TargetVersion.PY38, + TargetVersion.PY39, +} +PY36_ARGS = [f"--target-version={version.name.lower()}" for version in PY36_VERSIONS] +T = TypeVar("T") +R = TypeVar("R") @contextmanager @@ -65,18 +73,29 @@ def cache_dir(exists: bool = True) -> Iterator[Path]: @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 FakeContext(click.Context): + """A fake click Context for when calling functions that need it.""" + + def __init__(self) -> None: + self.default_map: Dict[str, Any] = {} + + +class FakeParameter(click.Parameter): + """A fake click Parameter for when calling functions that need it.""" + + def __init__(self) -> None: + pass class BlackRunner(CliRunner): @@ -99,32 +118,29 @@ class BlackRunner(CliRunner): sys.stderr = TextIOWrapper(self.stderrbuf, encoding=self.charset) yield output finally: - self.stdout_bytes = sys.stdout.buffer.getvalue() - self.stderr_bytes = sys.stderr.buffer.getvalue() + self.stdout_bytes = sys.stdout.buffer.getvalue() # type: ignore + self.stderr_bytes = sys.stderr.buffer.getvalue() # type: ignore sys.stderr = hold_stderr -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 BlackTestCase(BlackBaseTestCase): + def invokeBlack( + self, 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) + self.assertEqual( + result.exit_code, + exit_code, + msg=( + f"Failed with args: {args}\n" + f"stdout: {runner.stdout_bytes.decode()!r}\n" + f"stderr: {runner.stderr_bytes.decode()!r}\n" + f"exception: {result.exception}" + ), + ) @patch("black.dump_to_file", dump_to_stderr) def test_empty(self) -> None: @@ -132,7 +148,7 @@ class BlackTestCase(unittest.TestCase): actual = fs(source) self.assertFormatEqual(expected, actual) black.assert_equivalent(source, actual) - black.assert_stable(source, actual, line_length=ll) + black.assert_stable(source, actual, DEFAULT_MODE) def test_empty_ff(self) -> None: expected = "" @@ -145,85 +161,115 @@ 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", data=False) - 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", data=False) - 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_piping(self) -> None: - source, expected = read_data("../black", data=False) + source, expected = read_data("src/black/__init__", data=False) result = BlackRunner().invoke( black.main, - ["-", "--fast", f"--line-length={ll}"], + ["-", "--fast", f"--line-length={black.DEFAULT_LINE_LENGTH}"], 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) + 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") config = THIS_DIR / "data" / "empty_pyproject.toml" - args = ["-", "--fast", f"--line-length={ll}", "--diff", f"--config={config}"] + args = [ + "-", + "--fast", + f"--line-length={black.DEFAULT_LINE_LENGTH}", + "--diff", + f"--config={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) + def test_piping_diff_with_color(self) -> None: + source, _ = read_data("expression.py") + config = THIS_DIR / "data" / "empty_pyproject.toml" + args = [ + "-", + "--fast", + f"--line-length={black.DEFAULT_LINE_LENGTH}", + "--diff", + "--color", + f"--config={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[1;37m", 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_setup(self) -> None: - source, expected = read_data("../setup", data=False) - actual = fs(source) + def _test_wip(self) -> None: + source, expected = read_data("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) - self.assertFalse(ff(THIS_DIR / ".." / "setup.py")) + black.assert_stable(source, actual, black.FileMode()) + @unittest.expectedFailure @patch("black.dump_to_file", dump_to_stderr) - def test_function(self) -> None: - source, expected = read_data("function") + def test_trailing_comma_optional_parens_stability1(self) -> None: + source, _expected = read_data("trailing_comma_optional_parens1") actual = fs(source) - self.assertFormatEqual(expected, actual) - black.assert_equivalent(source, actual) - black.assert_stable(source, actual, line_length=ll) + black.assert_stable(source, actual, DEFAULT_MODE) + @unittest.expectedFailure @patch("black.dump_to_file", dump_to_stderr) - def test_function2(self) -> None: - source, expected = read_data("function2") + def test_trailing_comma_optional_parens_stability2(self) -> None: + source, _expected = read_data("trailing_comma_optional_parens2") actual = fs(source) - self.assertFormatEqual(expected, actual) - black.assert_equivalent(source, actual) - black.assert_stable(source, actual, line_length=ll) + black.assert_stable(source, actual, DEFAULT_MODE) + @unittest.expectedFailure @patch("black.dump_to_file", dump_to_stderr) - def test_expression(self) -> None: - source, expected = read_data("expression") + def test_trailing_comma_optional_parens_stability3(self) -> None: + source, _expected = read_data("trailing_comma_optional_parens3") + actual = fs(source) + black.assert_stable(source, actual, DEFAULT_MODE) + + @patch("black.dump_to_file", dump_to_stderr) + def test_pep_572(self) -> None: + source, expected = read_data("pep_572") actual = fs(source) self.assertFormatEqual(expected, actual) - black.assert_equivalent(source, actual) - black.assert_stable(source, actual, line_length=ll) + black.assert_stable(source, actual, DEFAULT_MODE) + if sys.version_info >= (3, 8): + black.assert_equivalent(source, actual) + + def test_pep_572_version_detection(self) -> None: + source, _ = read_data("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") @@ -237,7 +283,7 @@ 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") @@ -245,7 +291,7 @@ class BlackTestCase(unittest.TestCase): 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" ) try: result = BlackRunner().invoke(black.main, ["--diff", str(tmp_file)]) @@ -253,24 +299,52 @@ class BlackTestCase(unittest.TestCase): finally: os.unlink(tmp_file) actual = result.output - actual = diff_header.sub("[Deterministic header]", actual) + 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 = ( - 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) + def test_expression_diff_with_color(self) -> None: + source, _ = read_data("expression.py") + expected, _ = read_data("expression.diff") + tmp_file = Path(black.dump_to_file(source)) + try: + result = BlackRunner().invoke( + black.main, ["--diff", "--color", str(tmp_file)] + ) + 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[1;37m", 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_fstring(self) -> None: - source, expected = read_data("fstring") + def test_pep_570(self) -> None: + source, expected = read_data("pep_570") actual = fs(source) self.assertFormatEqual(expected, actual) - black.assert_equivalent(source, actual) - black.assert_stable(source, actual, line_length=ll) + black.assert_stable(source, actual, DEFAULT_MODE) + if sys.version_info >= (3, 8): + black.assert_equivalent(source, actual) + + def test_detect_pos_only_arguments(self) -> None: + source, _ = read_data("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) @patch("black.dump_to_file", dump_to_stderr) def test_string_quotes(self) -> None: @@ -278,188 +352,162 @@ class BlackTestCase(unittest.TestCase): 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 + black.assert_stable(source, actual, DEFAULT_MODE) + mode = replace(DEFAULT_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) + black.assert_stable(source, not_normalized, mode=mode) @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) + def test_docstring_no_string_normalization(self) -> None: + """Like test_docstring but with string normalization off.""" + source, expected = read_data("docstring_no_string_normalization") + mode = replace(DEFAULT_MODE, string_normalization=False) + actual = fs(source, mode=mode) self.assertFormatEqual(expected, actual) black.assert_equivalent(source, actual) - black.assert_stable(source, actual, line_length=ll) + black.assert_stable(source, actual, mode) - @patch("black.dump_to_file", dump_to_stderr) - def test_string_prefixes(self) -> None: - source, expected = read_data("string_prefixes") - actual = fs(source) + def test_long_strings_flag_disabled(self) -> None: + """Tests for turning off the string processing logic.""" + source, expected = read_data("long_strings_flag_disabled") + mode = replace(DEFAULT_MODE, experimental_string_processing=False) + actual = fs(source, mode=mode) self.assertFormatEqual(expected, actual) - black.assert_equivalent(source, actual) - black.assert_stable(source, actual, line_length=ll) + black.assert_stable(expected, actual, mode) @patch("black.dump_to_file", dump_to_stderr) def test_numeric_literals(self) -> None: source, expected = read_data("numeric_literals") - actual = fs(source, mode=black.FileMode.PYTHON36) + mode = replace(DEFAULT_MODE, target_versions=PY36_VERSIONS) + actual = fs(source, mode=mode) self.assertFormatEqual(expected, actual) black.assert_equivalent(source, actual) - black.assert_stable(source, actual, line_length=ll) + black.assert_stable(source, actual, mode) @patch("black.dump_to_file", dump_to_stderr) - def test_numeric_literals_py2(self) -> None: - source, expected = read_data("numeric_literals_py2") - actual = fs(source) + def test_numeric_literals_ignoring_underscores(self) -> None: + source, expected = read_data("numeric_literals_skip_underscores") + mode = replace(DEFAULT_MODE, target_versions=PY36_VERSIONS) + actual = fs(source, mode=mode) self.assertFormatEqual(expected, actual) - black.assert_stable(source, actual, line_length=ll) + black.assert_equivalent(source, actual) + black.assert_stable(source, actual, mode) - @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) + def test_skip_magic_trailing_comma(self) -> None: + source, _ = read_data("expression.py") + expected, _ = read_data("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)]) + 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_python2_unicode_literals(self) -> None: - source, expected = read_data("python2_unicode_literals") - actual = fs(source) + def test_python2_print_function(self) -> None: + source, expected = read_data("python2_print_function") + mode = replace(DEFAULT_MODE, target_versions={TargetVersion.PY27}) + actual = fs(source, mode=mode) self.assertFormatEqual(expected, actual) - black.assert_stable(source, actual, line_length=ll) + black.assert_equivalent(source, actual) + black.assert_stable(source, actual, mode) @patch("black.dump_to_file", dump_to_stderr) def test_stub(self) -> None: - mode = black.FileMode.PYI + mode = replace(DEFAULT_MODE, is_pyi=True) 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, actual, mode) @patch("black.dump_to_file", dump_to_stderr) - def test_python37(self) -> None: - source, expected = read_data("python37") + def test_async_as_identifier(self) -> None: + source_path = (THIS_DIR / "data" / "async_as_identifier.py").resolve() + source, expected = read_data("async_as_identifier") actual = fs(source) self.assertFormatEqual(expected, actual) major, minor = sys.version_info[:2] - if major > 3 or (major == 3 and minor >= 7): + if major < 3 or (major <= 3 and minor < 7): black.assert_equivalent(source, actual) - black.assert_stable(source, actual, line_length=ll) - - @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) + 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_fmtonoff2(self) -> None: - source, expected = read_data("fmtonoff2") - 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_remove_empty_parentheses_after_class(self) -> None: - source, expected = read_data("class_blank_parentheses") + def test_python37(self) -> None: + source_path = (THIS_DIR / "data" / "python37.py").resolve() + source, expected = read_data("python37") 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) @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_python38(self) -> None: + source, expected = read_data("python38") 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 >= 8): + black.assert_equivalent(source, actual) + black.assert_stable(source, actual, DEFAULT_MODE) @patch("black.dump_to_file", dump_to_stderr) - def test_bracket_match(self) -> None: - source, expected = read_data("bracketmatch") + def test_python39(self) -> None: + source, expected = read_data("python39") 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 >= 9): + black.assert_equivalent(source, actual) + black.assert_stable(source, actual, DEFAULT_MODE) + + 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) @@ -505,8 +553,8 @@ 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) @@ -515,8 +563,8 @@ 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") @@ -525,8 +573,8 @@ 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") @@ -535,8 +583,8 @@ 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) @@ -545,15 +593,22 @@ 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: @@ -595,8 +650,8 @@ 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) @@ -604,8 +659,8 @@ 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") @@ -614,8 +669,8 @@ 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") @@ -623,8 +678,8 @@ 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) @@ -632,15 +687,22 @@ 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: @@ -684,8 +746,8 @@ 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) @@ -694,8 +756,8 @@ 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") @@ -704,8 +766,8 @@ 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") @@ -713,8 +775,8 @@ 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) @@ -722,38 +784,112 @@ 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.PY27}) + black.lib2to3_parse(straddling, {TargetVersion.PY36}) + black.lib2to3_parse(straddling, {TargetVersion.PY27, TargetVersion.PY36}) + + py2_only = "print x" + black.lib2to3_parse(py2_only) + black.lib2to3_parse(py2_only, {TargetVersion.PY27}) + with self.assertRaises(black.InvalidInput): + black.lib2to3_parse(py2_only, {TargetVersion.PY36}) + with self.assertRaises(black.InvalidInput): + black.lib2to3_parse(py2_only, {TargetVersion.PY27, TargetVersion.PY36}) + + py3_only = "exec(x, end=y)" + black.lib2to3_parse(py3_only) + with self.assertRaises(black.InvalidInput): + black.lib2to3_parse(py3_only, {TargetVersion.PY27}) + black.lib2to3_parse(py3_only, {TargetVersion.PY36}) + black.lib2to3_parse(py3_only, {TargetVersion.PY27, 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("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)) + self.assertEqual(black.get_features_used(node), {Feature.F_STRINGS}) node = black.lib2to3_parse("123_456\n") - self.assertTrue(black.is_python36(node)) + self.assertEqual(black.get_features_used(node), {Feature.NUMERIC_UNDERSCORES}) node = black.lib2to3_parse("123456\n") - self.assertFalse(black.is_python36(node)) + self.assertEqual(black.get_features_used(node), set()) source, expected = read_data("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)) + self.assertEqual(black.get_features_used(node), expected_features) source, expected = read_data("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()) def test_get_future_imports(self) -> None: node = black.lib2to3_parse("\n") @@ -811,21 +947,22 @@ 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: @@ -847,7 +984,7 @@ class BlackTestCase(unittest.TestCase): with patch("black.out", out), patch("black.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) @@ -855,35 +992,33 @@ class BlackTestCase(unittest.TestCase): self.assertEqual("".join(err_lines), "") def test_cache_broken_file(self) -> None: - mode = black.FileMode.AUTO_DETECT + mode = DEFAULT_MODE with cache_dir() as workspace: - cache_file = black.get_cache_file(black.DEFAULT_LINE_LENGTH, mode) + cache_file = black.get_cache_file(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), {}) + self.assertEqual(black.read_cache(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) + self.invokeBlack([str(src)]) + cache = black.read_cache(mode) + self.assertIn(str(src), cache) def test_cache_single_file_already_cached(self) -> None: - mode = black.FileMode.AUTO_DETECT + mode = DEFAULT_MODE 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) + black.write_cache({}, [src], mode) + self.invokeBlack([str(src)]) with src.open("r") as fobj: self.assertEqual(fobj.read(), "print('hello')") - @event_loop(close=False) + @event_loop() def test_cache_multiple_files(self) -> None: - mode = black.FileMode.AUTO_DETECT + mode = DEFAULT_MODE with cache_dir() as workspace, patch( "black.ProcessPoolExecutor", new=ThreadPoolExecutor ): @@ -893,52 +1028,96 @@ class BlackTestCase(unittest.TestCase): 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) + black.write_cache({}, [one], mode) + self.invokeBlack([str(workspace)]) 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) + cache = black.read_cache(mode) + self.assertIn(str(one), cache) + self.assertIn(str(two), cache) def test_no_cache_when_writeback_diff(self) -> None: - mode = black.FileMode.AUTO_DETECT + mode = DEFAULT_MODE 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()) + with patch("black.read_cache") as read_cache, patch( + "black.write_cache" + ) as write_cache: + self.invokeBlack([str(src), "--diff"]) + cache_file = black.get_cache_file(mode) + self.assertFalse(cache_file.exists()) + write_cache.assert_not_called() + read_cache.assert_not_called() + + def test_no_cache_when_writeback_color_diff(self) -> 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: + self.invokeBlack([str(src), "--diff", "--color"]) + cache_file = black.get_cache_file(mode) + self.assertFalse(cache_file.exists()) + write_cache.assert_not_called() + read_cache.assert_not_called() + + @event_loop() + def test_output_locking_when_writeback_diff(self) -> 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.Manager", wraps=multiprocessing.Manager) as mgr: + self.invokeBlack(["--diff", str(workspace)], 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() + + @event_loop() + def test_output_locking_when_writeback_color_diff(self) -> 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.Manager", wraps=multiprocessing.Manager) as mgr: + self.invokeBlack(["--diff", "--color", str(workspace)], 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 = black.FileMode.AUTO_DETECT + mode = DEFAULT_MODE with cache_dir(): result = CliRunner().invoke( black.main, ["-"], input=BytesIO(b"print('hello')") ) self.assertEqual(result.exit_code, 0) - cache_file = black.get_cache_file(black.DEFAULT_LINE_LENGTH, mode) + cache_file = black.get_cache_file(mode) self.assertFalse(cache_file.exists()) def test_read_cache_no_cachefile(self) -> None: - mode = black.FileMode.AUTO_DETECT + mode = DEFAULT_MODE with cache_dir(): - self.assertEqual(black.read_cache(black.DEFAULT_LINE_LENGTH, mode), {}) + self.assertEqual(black.read_cache(mode), {}) def test_write_cache_read_cache(self) -> None: - mode = black.FileMode.AUTO_DETECT + mode = DEFAULT_MODE 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)) + black.write_cache({}, [src], mode) + cache = black.read_cache(mode) + self.assertIn(str(src), cache) + self.assertEqual(cache[str(src)], black.get_cache_info(src)) def test_filter_cached(self) -> None: with TemporaryDirectory() as workspace: @@ -949,7 +1128,10 @@ class BlackTestCase(unittest.TestCase): uncached.touch() cached.touch() cached_but_changed.touch() - cache = {cached: black.get_cache_info(cached), cached_but_changed: (0.0, 0)} + cache = { + str(cached): black.get_cache_info(cached), + str(cached_but_changed): (0.0, 0), + } todo, done = black.filter_cached( cache, {uncached, cached, cached_but_changed} ) @@ -957,15 +1139,15 @@ class BlackTestCase(unittest.TestCase): self.assertEqual(done, {cached}) def test_write_cache_creates_directory_if_needed(self) -> None: - mode = black.FileMode.AUTO_DETECT + mode = DEFAULT_MODE with cache_dir(exists=False) as workspace: self.assertFalse(workspace.exists()) - black.write_cache({}, [], black.DEFAULT_LINE_LENGTH, mode) + black.write_cache({}, [], mode) self.assertTrue(workspace.exists()) - @event_loop(close=False) + @event_loop() def test_failed_formatting_does_not_get_cached(self) -> None: - mode = black.FileMode.AUTO_DETECT + mode = DEFAULT_MODE with cache_dir() as workspace, patch( "black.ProcessPoolExecutor", new=ThreadPoolExecutor ): @@ -975,40 +1157,44 @@ class BlackTestCase(unittest.TestCase): 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) + self.invokeBlack([str(workspace)], exit_code=123) + cache = black.read_cache(mode) + self.assertNotIn(str(failing), cache) + self.assertIn(str(clean), cache) def test_write_cache_write_fail(self) -> None: - mode = black.FileMode.AUTO_DETECT + mode = DEFAULT_MODE with cache_dir(), patch.object(Path, "open") as mock: mock.side_effect = OSError - black.write_cache({}, [], black.DEFAULT_LINE_LENGTH, mode) + black.write_cache({}, [], mode) - @event_loop(close=False) + @event_loop() + @patch("black.ProcessPoolExecutor", MagicMock(side_effect=OSError)) + def test_works_in_mono_process_only_environment(self) -> None: + with cache_dir() as workspace: + 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 / "data" / "string_quotes.py").resolve() - result = CliRunner().invoke(black.main, [str(src1), "--diff", "--check"]) - self.assertEqual(result.exit_code, 1, result.output) + self.invokeBlack([str(src1), "--diff", "--check"], exit_code=1) # Files which will not be reformatted. src2 = (THIS_DIR / "data" / "composition.py").resolve() - result = CliRunner().invoke(black.main, [str(src2), "--diff", "--check"]) - self.assertEqual(result.exit_code, 0, result.output) + 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: 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([]) def test_broken_symlink(self) -> None: with cache_dir() as workspace: @@ -1017,43 +1203,43 @@ class BlackTestCase(unittest.TestCase): symlink.symlink_to("nonexistent.py") except OSError as e: self.skipTest(f"Can't create symlinks: {e}") - result = CliRunner().invoke(black.main, [str(workspace.resolve())]) - self.assertEqual(result.exit_code, 0) + self.invokeBlack([str(workspace.resolve())]) def test_read_cache_line_lengths(self) -> None: - mode = black.FileMode.AUTO_DETECT + 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], 1, mode) - one = black.read_cache(1, mode) - self.assertIn(path, one) - two = black.read_cache(2, mode) - self.assertNotIn(path, two) + black.write_cache({}, [path], mode) + one = black.read_cache(mode) + self.assertIn(str(path), one) + two = black.read_cache(short_mode) + self.assertNotIn(str(path), two) def test_single_file_force_pyi(self) -> None: - reg_mode = black.FileMode.AUTO_DETECT - pyi_mode = black.FileMode.PYI + pyi_mode = replace(DEFAULT_MODE, is_pyi=True) contents, expected = read_data("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 + reg_mode = DEFAULT_MODE + pyi_mode = replace(DEFAULT_MODE, is_pyi=True) contents, expected = read_data("force_pyi") with cache_dir() as workspace: paths = [ @@ -1063,18 +1249,17 @@ 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") @@ -1086,28 +1271,27 @@ class BlackTestCase(unittest.TestCase): self.assertFormatEqual(actual, expected) def test_single_file_force_py36(self) -> None: - reg_mode = black.FileMode.AUTO_DETECT - py36_mode = black.FileMode.PYTHON36 + reg_mode = DEFAULT_MODE + py36_mode = replace(DEFAULT_MODE, target_versions=PY36_VERSIONS) source, expected = read_data("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 + reg_mode = DEFAULT_MODE + py36_mode = replace(DEFAULT_MODE, target_versions=PY36_VERSIONS) source, expected = read_data("force_py36") with cache_dir() as workspace: paths = [ @@ -1117,25 +1301,24 @@ 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=BytesIO(source.encode("utf8")) + black.main, + ["-", "-q", "--target-version=py36"], + input=BytesIO(source.encode("utf8")), ) self.assertEqual(result.exit_code, 0) actual = result.output @@ -1146,6 +1329,7 @@ class BlackTestCase(unittest.TestCase): include = re.compile(r"\.pyi?$") exclude = re.compile(r"/exclude/|/\.definitely_exclude/") report = black.Report() + gitignore = PathSpec.from_lines("gitwildmatch", []) sources: List[Path] = [] expected = [ Path(path / "b/dont_exclude/a.py"), @@ -1153,13 +1337,221 @@ class BlackTestCase(unittest.TestCase): ] 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, report, gitignore + ) + ) + self.assertEqual(sorted(expected), sorted(sources)) + + @patch("black.find_project_root", lambda *args: THIS_DIR.resolve()) + 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 = THIS_DIR / "data" / "include_exclude_tests" + include = "" + exclude = r"/exclude/|a\.py" + src = str(path / "b/exclude/a.py") + report = black.Report() + expected = [Path(path / "b/exclude/a.py")] + sources = list( + black.get_sources( + ctx=FakeContext(), + src=(src,), + quiet=True, + verbose=False, + include=include, + exclude=exclude, + force_exclude=None, + report=report, + stdin_filename=None, + ) + ) + self.assertEqual(sorted(expected), sorted(sources)) + + @patch("black.find_project_root", lambda *args: THIS_DIR.resolve()) + def test_get_sources_with_stdin(self) -> None: + include = "" + exclude = r"/exclude/|a\.py" + src = "-" + report = black.Report() + expected = [Path("-")] + sources = list( + black.get_sources( + ctx=FakeContext(), + src=(src,), + quiet=True, + verbose=False, + include=include, + exclude=exclude, + force_exclude=None, + report=report, + stdin_filename=None, + ) + ) + self.assertEqual(sorted(expected), sorted(sources)) + + @patch("black.find_project_root", lambda *args: THIS_DIR.resolve()) + def test_get_sources_with_stdin_filename(self) -> None: + include = "" + exclude = r"/exclude/|a\.py" + src = "-" + report = black.Report() + stdin_filename = str(THIS_DIR / "data/collections.py") + expected = [Path(f"__BLACK_STDIN_FILENAME__{stdin_filename}")] + sources = list( + black.get_sources( + ctx=FakeContext(), + src=(src,), + quiet=True, + verbose=False, + include=include, + exclude=exclude, + force_exclude=None, + report=report, + stdin_filename=stdin_filename, + ) + ) + self.assertEqual(sorted(expected), sorted(sources)) + + @patch("black.find_project_root", lambda *args: THIS_DIR.resolve()) + def test_get_sources_with_stdin_filename_and_exclude(self) -> None: + # Exclude shouldn't exclude stdin_filename since it is mimicing the + # file being passed directly. This is the same as + # test_exclude_for_issue_1572 + path = THIS_DIR / "data" / "include_exclude_tests" + include = "" + exclude = r"/exclude/|a\.py" + src = "-" + report = black.Report() + stdin_filename = str(path / "b/exclude/a.py") + expected = [Path(f"__BLACK_STDIN_FILENAME__{stdin_filename}")] + sources = list( + black.get_sources( + ctx=FakeContext(), + src=(src,), + quiet=True, + verbose=False, + include=include, + exclude=exclude, + force_exclude=None, + report=report, + stdin_filename=stdin_filename, + ) + ) + self.assertEqual(sorted(expected), sorted(sources)) + + @patch("black.find_project_root", lambda *args: THIS_DIR.resolve()) + 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" + include = "" + force_exclude = r"/exclude/|a\.py" + src = "-" + report = black.Report() + stdin_filename = str(path / "b/exclude/a.py") + sources = list( + black.get_sources( + ctx=FakeContext(), + src=(src,), + quiet=True, + verbose=False, + include=include, + exclude="", + force_exclude=force_exclude, + report=report, + stdin_filename=stdin_filename, + ) + ) + self.assertEqual([], sorted(sources)) + + 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) + + 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() + # __BLACK_STDIN_FILENAME__ should have been striped + report.done.assert_called_with(expected, black.Changed.YES) + + 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 = Path(str(THIS_DIR / "data/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 striped + report.done.assert_called_with(expected, black.Changed.YES) + + def test_gitignore_exclude(self) -> None: + path = THIS_DIR / "data" / "include_exclude_tests" + include = re.compile(r"\.pyi?$") + exclude = re.compile(r"") + report = black.Report() + gitignore = PathSpec.from_lines( + "gitwildmatch", ["exclude/", ".definitely_exclude"] + ) + sources: List[Path] = [] + expected = [ + 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( + path.iterdir(), this_abs, include, exclude, None, report, gitignore + ) ) self.assertEqual(sorted(expected), sorted(sources)) def test_empty_include(self) -> None: path = THIS_DIR / "data" / "include_exclude_tests" report = black.Report() + gitignore = PathSpec.from_lines("gitwildmatch", []) empty = re.compile(r"") sources: List[Path] = [] expected = [ @@ -1175,8 +1567,14 @@ class BlackTestCase(unittest.TestCase): ] this_abs = THIS_DIR.resolve() sources.extend( - black.gen_python_files_in_dir( - path, this_abs, empty, re.compile(black.DEFAULT_EXCLUDES), report + black.gen_python_files( + path.iterdir(), + this_abs, + empty, + re.compile(black.DEFAULT_EXCLUDES), + None, + report, + gitignore, ) ) self.assertEqual(sorted(expected), sorted(sources)) @@ -1184,6 +1582,7 @@ class BlackTestCase(unittest.TestCase): def test_empty_exclude(self) -> None: path = THIS_DIR / "data" / "include_exclude_tests" report = black.Report() + gitignore = PathSpec.from_lines("gitwildmatch", []) empty = re.compile(r"") sources: List[Path] = [] expected = [ @@ -1196,16 +1595,21 @@ class BlackTestCase(unittest.TestCase): ] this_abs = THIS_DIR.resolve() sources.extend( - black.gen_python_files_in_dir( - path, this_abs, re.compile(black.DEFAULT_INCLUDES), empty, report + black.gen_python_files( + path.iterdir(), + this_abs, + re.compile(black.DEFAULT_INCLUDES), + empty, + None, + report, + gitignore, ) ) 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) + self.invokeBlack(["-", option, "**()(!!*)"], exit_code=2) def test_preserves_line_endings(self) -> None: with TemporaryDirectory() as workspace: @@ -1226,6 +1630,7 @@ class BlackTestCase(unittest.TestCase): result = runner.invoke( black.main, ["-", "--fast"], input=BytesIO(contents.encode("utf8")) ) + self.assertEqual(result.exit_code, 0) output = runner.stdout_bytes self.assertIn(nl.encode("utf8"), output) if nl == "\n": @@ -1237,20 +1642,26 @@ class BlackTestCase(unittest.TestCase): def test_symlink_out_of_root_directory(self) -> None: path = MagicMock() - root = THIS_DIR + 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" child.is_symlink.return_value = True try: - list(black.gen_python_files_in_dir(path, root, include, exclude, report)) + list( + black.gen_python_files( + path.iterdir(), root, include, exclude, None, report, gitignore + ) + ) except ValueError as ve: - self.fail("`get_python_files_in_dir()` failed: {ve}") + self.fail(f"`get_python_files_in_dir()` failed: {ve}") path.iterdir.assert_called_once() child.resolve.assert_called_once() child.is_symlink.assert_called_once() @@ -1258,7 +1669,11 @@ class BlackTestCase(unittest.TestCase): # outside of the `root` directory. child.is_symlink.return_value = False with self.assertRaises(ValueError): - list(black.gen_python_files_in_dir(path, root, include, exclude, report)) + list( + black.gen_python_files( + path.iterdir(), root, include, exclude, None, report, gitignore + ) + ) path.iterdir.assert_called() self.assertEqual(path.iterdir.call_count, 2) child.resolve.assert_called() @@ -1288,6 +1703,127 @@ class BlackTestCase(unittest.TestCase): 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_FILE) + + 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["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?$") + self.assertEqual(config["include"], r"\.py?$") + + 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() + ) + self.assertEqual(black.find_project_root((src_dir,)), src_dir.resolve()) + self.assertEqual(black.find_project_root((src_python,)), src_dir.resolve()) + + def test_bpo_33660_workaround(self) -> None: + if system() == "Windows": + return + + # https://bugs.python.org/issue33660 + + old_cwd = Path.cwd() + try: + root = Path("/") + os.chdir(str(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") + finally: + os.chdir(str(old_cwd)) + + 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) + + +with open(black.__file__, "r", encoding="utf-8") as _bf: + black_source_lines = _bf.readlines() + + +def tracefunc(frame: types.FrameType, event: str, arg: Any) -> Callable: + """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 + if __name__ == "__main__": unittest.main(module="test_black")