X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/cb5aadad74c0a1c9c514a633c632c99b668c70ed..cb6f2198b8fc700f8cc0d36c338d613e509250f8:/tests/test_black.py diff --git a/tests/test_black.py b/tests/test_black.py index f71f9b3..f89f140 100644 --- a/tests/test_black.py +++ b/tests/test_black.py @@ -1,36 +1,81 @@ #!/usr/bin/env python3 +import asyncio +import logging +from concurrent.futures import ThreadPoolExecutor +from contextlib import contextmanager +from dataclasses import replace from functools import partial -from io import StringIO +import inspect +from io import BytesIO, TextIOWrapper import os from pathlib import Path +import regex as re import sys -from typing import Any, List, Tuple +from tempfile import TemporaryDirectory +import types +from typing import ( + Any, + BinaryIO, + Callable, + Dict, + Generator, + List, + Tuple, + Iterator, + TypeVar, +) import unittest -from unittest.mock import patch +from unittest.mock import patch, MagicMock +import click from click import unstyle +from click.testing import CliRunner import black +from black import Feature, TargetVersion -ll = 88 -ff = partial(black.format_file_in_place, line_length=ll, fast=True) -fs = partial(black.format_str, line_length=ll) +try: + import blackd + from aiohttp.test_utils import AioHTTPTestCase, unittest_run_loop + from aiohttp import web +except ImportError: + has_blackd_deps = False +else: + has_blackd_deps = True + +from pathspec import PathSpec + +# Import other test classes +from .test_primer import PrimerCLITests # noqa: F401 + + +DEFAULT_MODE = black.FileMode(experimental_string_processing=True) +ff = partial(black.format_file_in_place, mode=DEFAULT_MODE, fast=True) +fs = partial(black.format_str, mode=DEFAULT_MODE) THIS_FILE = Path(__file__) THIS_DIR = THIS_FILE.parent +PROJECT_ROOT = THIS_DIR.parent +DETERMINISTIC_HEADER = "[Deterministic header]" EMPTY_LINE = "# EMPTY LINE WITH WHITESPACE" + " (this comment will be removed)" +PY36_ARGS = [ + f"--target-version={version.name.lower()}" for version in black.PY36_VERSIONS +] +T = TypeVar("T") +R = TypeVar("R") def dump_to_stderr(*output: str) -> str: return "\n" + "\n".join(output) + "\n" -def read_data(name: str) -> Tuple[str, str]: +def read_data(name: str, data: bool = True) -> Tuple[str, str]: """read_data('test_name') -> 'input', 'output'""" - if not name.endswith((".py", ".out", ".diff")): + 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: + base_dir = THIS_DIR / "data" if data else PROJECT_ROOT + with open(base_dir / name, "r", encoding="utf8") as test: lines = test.readlines() result = _input for line in lines: @@ -46,8 +91,81 @@ def read_data(name: str) -> Tuple[str, str]: return "".join(_input).strip() + "\n", "".join(_output).strip() + "\n" +@contextmanager +def cache_dir(exists: bool = True) -> Iterator[Path]: + with TemporaryDirectory() as workspace: + cache_dir = Path(workspace) + if not exists: + cache_dir = cache_dir / "new" + with patch("black.CACHE_DIR", cache_dir): + yield cache_dir + + +@contextmanager +def event_loop() -> Iterator[None]: + policy = asyncio.get_event_loop_policy() + loop = policy.new_event_loop() + asyncio.set_event_loop(loop) + try: + yield + + finally: + loop.close() + + +@contextmanager +def skip_if_exception(e: str) -> Iterator[None]: + try: + yield + except Exception as exc: + if exc.__class__.__name__ == e: + unittest.skip(f"Encountered expected exception {exc}, skipping") + else: + raise + + +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): + """Modify CliRunner so that stderr is not merged with stdout. + + This is a hack that can be removed once we depend on Click 7.x""" + + def __init__(self) -> None: + self.stderrbuf = BytesIO() + self.stdoutbuf = BytesIO() + self.stdout_bytes = b"" + self.stderr_bytes = b"" + 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: + 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 + _diffThreshold = 2 ** 20 def assertFormatEqual(self, expected: str, actual: str) -> None: if actual != expected and not os.environ.get("SKIP_AST_PRINT"): @@ -66,76 +184,184 @@ class BlackTestCase(unittest.TestCase): list(bdv.visit(exp_node)) except Exception as ve: black.err(str(ve)) - self.assertEqual(expected, actual) + self.assertMultiLineEqual(expected, actual) + + 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_self(self) -> None: - source, expected = read_data("test_black") - actual = fs(source) + def checkSourceFile(self, name: str, mode: black.FileMode = DEFAULT_MODE) -> None: + path = THIS_DIR.parent / name + source, expected = read_data(str(path), data=False) + actual = fs(source, mode=mode) self.assertFormatEqual(expected, actual) black.assert_equivalent(source, actual) - black.assert_stable(source, actual, line_length=ll) - self.assertFalse(ff(THIS_FILE)) + black.assert_stable(source, actual, mode) + self.assertFalse(ff(path)) @patch("black.dump_to_file", dump_to_stderr) - def test_black(self) -> None: - source, expected = read_data("../black") + 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) - self.assertFalse(ff(THIS_DIR / ".." / "black.py")) + black.assert_stable(source, actual, DEFAULT_MODE) - def test_piping(self) -> None: - source, expected = read_data("../black") - hold_stdin, hold_stdout = sys.stdin, sys.stdout + def test_empty_ff(self) -> None: + expected = "" + tmp_file = Path(black.dump_to_file()) try: - sys.stdin, sys.stdout = StringIO(source), StringIO() - sys.stdin.name = "" - black.format_stdin_to_stdout( - line_length=ll, fast=True, write_back=black.WriteBack.YES - ) - sys.stdout.seek(0) - actual = sys.stdout.read() + self.assertFalse(ff(tmp_file, write_back=black.WriteBack.YES)) + with open(tmp_file, encoding="utf8") as f: + actual = f.read() finally: - sys.stdin, sys.stdout = hold_stdin, hold_stdout + os.unlink(tmp_file) self.assertFormatEqual(expected, actual) - black.assert_equivalent(source, actual) - black.assert_stable(source, actual, line_length=ll) + + def test_self(self) -> None: + self.checkSourceFile("tests/test_black.py") + + def test_black(self) -> None: + self.checkSourceFile("src/black/__init__.py") + + def test_pygram(self) -> None: + self.checkSourceFile("src/blib2to3/pygram.py") + + def test_pytree(self) -> None: + self.checkSourceFile("src/blib2to3/pytree.py") + + def test_conv(self) -> None: + self.checkSourceFile("src/blib2to3/pgen2/conv.py") + + def test_driver(self) -> None: + self.checkSourceFile("src/blib2to3/pgen2/driver.py") + + def test_grammar(self) -> None: + self.checkSourceFile("src/blib2to3/pgen2/grammar.py") + + def test_literals(self) -> None: + self.checkSourceFile("src/blib2to3/pgen2/literals.py") + + def test_parse(self) -> None: + self.checkSourceFile("src/blib2to3/pgen2/parse.py") + + def test_pgen(self) -> None: + self.checkSourceFile("src/blib2to3/pgen2/pgen.py") + + def test_tokenize(self) -> None: + self.checkSourceFile("src/blib2to3/pgen2/tokenize.py") + + def test_token(self) -> None: + self.checkSourceFile("src/blib2to3/pgen2/token.py") + + def test_setup(self) -> None: + self.checkSourceFile("setup.py") + + def test_piping(self) -> None: + source, expected = read_data("src/black/__init__", data=False) + result = BlackRunner().invoke( + black.main, + ["-", "--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, DEFAULT_MODE) def test_piping_diff(self) -> None: + diff_header = re.compile( + 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") - hold_stdin, hold_stdout = sys.stdin, sys.stdout - try: - sys.stdin, sys.stdout = StringIO(source), StringIO() - sys.stdin.name = "" - black.format_stdin_to_stdout( - line_length=ll, fast=True, write_back=black.WriteBack.DIFF - ) - sys.stdout.seek(0) - actual = sys.stdout.read() - finally: - sys.stdin, sys.stdout = hold_stdin, hold_stdout + config = THIS_DIR / "data" / "empty_pyproject.toml" + 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 = 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") + 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) - self.assertFalse(ff(THIS_DIR / ".." / "setup.py")) + black.assert_stable(source, actual, DEFAULT_MODE) @patch("black.dump_to_file", dump_to_stderr) - def test_function(self) -> None: - source, expected = read_data("function") + def test_function2(self) -> None: + source, expected = read_data("function2") + actual = fs(source) + self.assertFormatEqual(expected, actual) + black.assert_equivalent(source, actual) + black.assert_stable(source, actual, DEFAULT_MODE) + + @patch("black.dump_to_file", dump_to_stderr) + def test_function_trailing_comma_wip(self) -> None: + source, expected = read_data("function_trailing_comma_wip") + # sys.settrace(tracefunc) actual = fs(source) + # 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_function_trailing_comma(self) -> None: + source, expected = read_data("function_trailing_comma") + actual = fs(source) + self.assertFormatEqual(expected, actual) + black.assert_equivalent(source, actual) + black.assert_stable(source, actual, DEFAULT_MODE) @patch("black.dump_to_file", dump_to_stderr) def test_expression(self) -> None: @@ -143,53 +369,107 @@ 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) + + @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_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") tmp_file = Path(black.dump_to_file(source)) try: self.assertTrue(ff(tmp_file, write_back=black.WriteBack.YES)) - with open(tmp_file) as f: + with open(tmp_file, encoding="utf8") as f: actual = f.read() finally: os.unlink(tmp_file) 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") tmp_file = Path(black.dump_to_file(source)) - hold_stdout = sys.stdout + 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: - sys.stdout = StringIO() - self.assertTrue(ff(tmp_file, write_back=black.WriteBack.DIFF)) - sys.stdout.seek(0) - actual = sys.stdout.read() - actual = actual.replace(tmp_file.name, "") + result = BlackRunner().invoke(black.main, ["--diff", str(tmp_file)]) + self.assertEqual(result.exit_code, 0) finally: - sys.stdout = hold_stdout 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 = ( - 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") 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) + + @patch("black.dump_to_file", dump_to_stderr) + def test_pep_570(self) -> None: + source, expected = read_data("pep_570") + actual = fs(source) + self.assertFormatEqual(expected, actual) + 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: @@ -197,7 +477,70 @@ 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) + mode = replace(DEFAULT_MODE, string_normalization=False) + not_normalized = fs(source, mode=mode) + self.assertFormatEqual(source.replace("\\\n", ""), not_normalized) + black.assert_equivalent(source, not_normalized) + black.assert_stable(source, not_normalized, mode=mode) + + @patch("black.dump_to_file", dump_to_stderr) + def test_docstring(self) -> None: + source, expected = read_data("docstring") + actual = fs(source) + self.assertFormatEqual(expected, actual) + black.assert_equivalent(source, actual) + black.assert_stable(source, actual, DEFAULT_MODE) + + def test_long_strings(self) -> None: + """Tests for splitting long strings.""" + source, expected = read_data("long_strings") + actual = fs(source) + self.assertFormatEqual(expected, actual) + black.assert_equivalent(source, actual) + black.assert_stable(source, actual, DEFAULT_MODE) + + 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_stable(expected, actual, mode) + + @patch("black.dump_to_file", dump_to_stderr) + def test_long_strings__edge_case(self) -> None: + """Edge-case tests for splitting long strings.""" + source, expected = read_data("long_strings__edge_case") + actual = fs(source) + self.assertFormatEqual(expected, actual) + black.assert_equivalent(source, actual) + black.assert_stable(source, actual, DEFAULT_MODE) + + @patch("black.dump_to_file", dump_to_stderr) + def test_long_strings__regression(self) -> None: + """Regression tests for splitting long strings.""" + source, expected = read_data("long_strings__regression") + actual = fs(source) + self.assertFormatEqual(expected, actual) + black.assert_equivalent(source, actual) + black.assert_stable(source, actual, DEFAULT_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, DEFAULT_MODE) + + @patch("black.dump_to_file", dump_to_stderr) + def test_percent_precedence(self) -> None: + source, expected = read_data("percent_precedence") + actual = fs(source) + self.assertFormatEqual(expected, actual) + black.assert_equivalent(source, actual) + black.assert_stable(source, actual, DEFAULT_MODE) @patch("black.dump_to_file", dump_to_stderr) def test_comments(self) -> None: @@ -205,7 +548,7 @@ 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) @patch("black.dump_to_file", dump_to_stderr) def test_comments2(self) -> None: @@ -213,7 +556,7 @@ 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) @patch("black.dump_to_file", dump_to_stderr) def test_comments3(self) -> None: @@ -221,7 +564,7 @@ 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) @patch("black.dump_to_file", dump_to_stderr) def test_comments4(self) -> None: @@ -229,7 +572,39 @@ 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) + + @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, DEFAULT_MODE) + + @patch("black.dump_to_file", dump_to_stderr) + def test_comments6(self) -> None: + source, expected = read_data("comments6") + actual = fs(source) + self.assertFormatEqual(expected, actual) + black.assert_equivalent(source, actual) + black.assert_stable(source, actual, DEFAULT_MODE) + + @patch("black.dump_to_file", dump_to_stderr) + def test_comments7(self) -> None: + source, expected = read_data("comments7") + actual = fs(source) + self.assertFormatEqual(expected, actual) + black.assert_equivalent(source, actual) + black.assert_stable(source, actual, DEFAULT_MODE) + + @patch("black.dump_to_file", dump_to_stderr) + def test_comment_after_escaped_newline(self) -> None: + source, expected = read_data("comment_after_escaped_newline") + actual = fs(source) + self.assertFormatEqual(expected, actual) + black.assert_equivalent(source, actual) + black.assert_stable(source, actual, DEFAULT_MODE) @patch("black.dump_to_file", dump_to_stderr) def test_cantfit(self) -> None: @@ -237,7 +612,7 @@ 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) @patch("black.dump_to_file", dump_to_stderr) def test_import_spacing(self) -> None: @@ -245,7 +620,7 @@ 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) @patch("black.dump_to_file", dump_to_stderr) def test_composition(self) -> None: @@ -253,7 +628,7 @@ 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) @patch("black.dump_to_file", dump_to_stderr) def test_empty_lines(self) -> None: @@ -261,15 +636,121 @@ 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) + + @patch("black.dump_to_file", dump_to_stderr) + def test_remove_parens(self) -> None: + source, expected = read_data("remove_parens") + actual = fs(source) + self.assertFormatEqual(expected, actual) + black.assert_equivalent(source, actual) + black.assert_stable(source, actual, DEFAULT_MODE) + + @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, DEFAULT_MODE) + + @patch("black.dump_to_file", dump_to_stderr) + def test_numeric_literals(self) -> None: + source, expected = read_data("numeric_literals") + mode = replace(DEFAULT_MODE, target_versions=black.PY36_VERSIONS) + actual = fs(source, mode=mode) + self.assertFormatEqual(expected, actual) + black.assert_equivalent(source, actual) + black.assert_stable(source, actual, mode) + + @patch("black.dump_to_file", dump_to_stderr) + def test_numeric_literals_ignoring_underscores(self) -> None: + source, expected = read_data("numeric_literals_skip_underscores") + mode = replace(DEFAULT_MODE, target_versions=black.PY36_VERSIONS) + actual = fs(source, mode=mode) + self.assertFormatEqual(expected, actual) + black.assert_equivalent(source, actual) + 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) + self.assertFormatEqual(expected, actual) + black.assert_stable(source, actual, DEFAULT_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) + black.assert_equivalent(source, actual) + black.assert_stable(source, actual, DEFAULT_MODE) + + @patch("black.dump_to_file", dump_to_stderr) + 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_equivalent(source, actual) + black.assert_stable(source, actual, mode) + + @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_equivalent(source, actual) + black.assert_stable(source, actual, DEFAULT_MODE) + + @patch("black.dump_to_file", dump_to_stderr) + def test_stub(self) -> None: + 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, mode) + + @patch("black.dump_to_file", dump_to_stderr) + 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): + 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_python37(self) -> None: + source_path = (THIS_DIR / "data" / "python37.py").resolve() + source, expected = read_data("python37") + actual = fs(source) + self.assertFormatEqual(expected, actual) + 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_python38(self) -> None: + source, expected = read_data("python38") + actual = fs(source) + self.assertFormatEqual(expected, actual) + 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_fmtonoff(self) -> None: @@ -277,10 +758,96 @@ 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_report(self) -> None: - report = black.Report() + @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, DEFAULT_MODE) + + @patch("black.dump_to_file", dump_to_stderr) + def test_fmtonoff3(self) -> None: + source, expected = read_data("fmtonoff3") + actual = fs(source) + self.assertFormatEqual(expected, actual) + black.assert_equivalent(source, actual) + black.assert_stable(source, actual, DEFAULT_MODE) + + @patch("black.dump_to_file", dump_to_stderr) + def test_fmtonoff4(self) -> None: + source, expected = read_data("fmtonoff4") + actual = fs(source) + self.assertFormatEqual(expected, actual) + black.assert_equivalent(source, actual) + black.assert_stable(source, actual, DEFAULT_MODE) + + @patch("black.dump_to_file", dump_to_stderr) + def test_remove_empty_parentheses_after_class(self) -> None: + source, expected = read_data("class_blank_parentheses") + actual = fs(source) + self.assertFormatEqual(expected, actual) + black.assert_equivalent(source, actual) + black.assert_stable(source, actual, DEFAULT_MODE) + + @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") + actual = fs(source) + self.assertFormatEqual(expected, actual) + 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") + actual = fs(source) + self.assertFormatEqual(expected, actual) + black.assert_equivalent(source, actual) + black.assert_stable(source, actual, DEFAULT_MODE) + + @patch("black.dump_to_file", dump_to_stderr) + def test_tuple_assign(self) -> None: + source, expected = read_data("tupleassign") + actual = fs(source) + self.assertFormatEqual(expected, actual) + black.assert_equivalent(source, actual) + black.assert_stable(source, actual, DEFAULT_MODE) + + @patch("black.dump_to_file", dump_to_stderr) + def test_beginning_backslash(self) -> None: + source, expected = read_data("beginning_backslash") + actual = fs(source) + self.assertFormatEqual(expected, actual) + 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) out_lines = [] err_lines = [] @@ -291,87 +858,372 @@ class BlackTestCase(unittest.TestCase): err_lines.append(msg) with patch("black.out", out), patch("black.err", err): - report.done(Path("f1"), changed=False) + report.done(Path("f1"), black.Changed.NO) self.assertEqual(len(out_lines), 1) self.assertEqual(len(err_lines), 0) self.assertEqual(out_lines[-1], "f1 already well formatted, good job.") self.assertEqual(unstyle(str(report)), "1 file left unchanged.") self.assertEqual(report.return_code, 0) - report.done(Path("f2"), changed=True) + report.done(Path("f2"), black.Changed.YES) self.assertEqual(len(out_lines), 2) self.assertEqual(len(err_lines), 0) self.assertEqual(out_lines[-1], "reformatted f2") self.assertEqual( unstyle(str(report)), "1 file reformatted, 1 file left unchanged." ) + report.done(Path("f3"), black.Changed.CACHED) + self.assertEqual(len(out_lines), 3) + self.assertEqual(len(err_lines), 0) + self.assertEqual( + out_lines[-1], "f3 wasn't modified on disk since last run." + ) + self.assertEqual( + unstyle(str(report)), "1 file reformatted, 2 files left unchanged." + ) self.assertEqual(report.return_code, 0) report.check = True self.assertEqual(report.return_code, 1) report.check = False report.failed(Path("e1"), "boom") - self.assertEqual(len(out_lines), 2) + self.assertEqual(len(out_lines), 3) self.assertEqual(len(err_lines), 1) self.assertEqual(err_lines[-1], "error: cannot format e1: boom") self.assertEqual( unstyle(str(report)), - "1 file reformatted, 1 file 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"), changed=True) - self.assertEqual(len(out_lines), 3) + report.done(Path("f3"), black.Changed.YES) + self.assertEqual(len(out_lines), 4) self.assertEqual(len(err_lines), 1) self.assertEqual(out_lines[-1], "reformatted f3") self.assertEqual( unstyle(str(report)), - "2 files reformatted, 1 file 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") - self.assertEqual(len(out_lines), 3) + self.assertEqual(len(out_lines), 4) self.assertEqual(len(err_lines), 2) self.assertEqual(err_lines[-1], "error: cannot format e2: boom") self.assertEqual( unstyle(str(report)), - "2 files reformatted, 1 file 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"), changed=False) - self.assertEqual(len(out_lines), 4) + report.path_ignored(Path("wat"), "no match") + self.assertEqual(len(out_lines), 5) + self.assertEqual(len(err_lines), 2) + 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.", + ) + self.assertEqual(report.return_code, 123) + report.done(Path("f4"), black.Changed.NO) + self.assertEqual(len(out_lines), 6) self.assertEqual(len(err_lines), 2) self.assertEqual(out_lines[-1], "f4 already well formatted, good job.") self.assertEqual( unstyle(str(report)), - "2 files reformatted, 2 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.", + ) + 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) + out_lines = [] + err_lines = [] + + def out(msg: str, **kwargs: Any) -> None: + out_lines.append(msg) + + def err(msg: str, **kwargs: Any) -> None: + err_lines.append(msg) + + with patch("black.out", out), patch("black.err", err): + report.done(Path("f1"), black.Changed.NO) + self.assertEqual(len(out_lines), 0) + self.assertEqual(len(err_lines), 0) + self.assertEqual(unstyle(str(report)), "1 file left unchanged.") + self.assertEqual(report.return_code, 0) + report.done(Path("f2"), black.Changed.YES) + self.assertEqual(len(out_lines), 0) + self.assertEqual(len(err_lines), 0) + self.assertEqual( + unstyle(str(report)), "1 file reformatted, 1 file left unchanged." + ) + report.done(Path("f3"), black.Changed.CACHED) + self.assertEqual(len(out_lines), 0) + self.assertEqual(len(err_lines), 0) + self.assertEqual( + unstyle(str(report)), "1 file reformatted, 2 files left unchanged." + ) + self.assertEqual(report.return_code, 0) + report.check = True + self.assertEqual(report.return_code, 1) + report.check = False + report.failed(Path("e1"), "boom") + self.assertEqual(len(out_lines), 0) + self.assertEqual(len(err_lines), 1) + 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.", + ) + self.assertEqual(report.return_code, 123) + report.done(Path("f3"), black.Changed.YES) + self.assertEqual(len(out_lines), 0) + self.assertEqual(len(err_lines), 1) + self.assertEqual( + unstyle(str(report)), + "2 files reformatted, 2 files left unchanged, 1 file failed to" + " reformat.", + ) + self.assertEqual(report.return_code, 123) + report.failed(Path("e2"), "boom") + self.assertEqual(len(out_lines), 0) + self.assertEqual(len(err_lines), 2) + 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.", + ) + self.assertEqual(report.return_code, 123) + report.path_ignored(Path("wat"), "no match") + self.assertEqual(len(out_lines), 0) + self.assertEqual(len(err_lines), 2) + self.assertEqual( + unstyle(str(report)), + "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) + self.assertEqual(len(out_lines), 0) + self.assertEqual(len(err_lines), 2) + self.assertEqual( + unstyle(str(report)), + "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.", + ) + 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: + report = black.Report() + out_lines = [] + err_lines = [] + + def out(msg: str, **kwargs: Any) -> None: + out_lines.append(msg) + + def err(msg: str, **kwargs: Any) -> None: + err_lines.append(msg) + + with patch("black.out", out), patch("black.err", err): + report.done(Path("f1"), black.Changed.NO) + self.assertEqual(len(out_lines), 0) + self.assertEqual(len(err_lines), 0) + self.assertEqual(unstyle(str(report)), "1 file left unchanged.") + self.assertEqual(report.return_code, 0) + report.done(Path("f2"), black.Changed.YES) + self.assertEqual(len(out_lines), 1) + self.assertEqual(len(err_lines), 0) + self.assertEqual(out_lines[-1], "reformatted f2") + self.assertEqual( + unstyle(str(report)), "1 file reformatted, 1 file left unchanged." + ) + report.done(Path("f3"), black.Changed.CACHED) + self.assertEqual(len(out_lines), 1) + self.assertEqual(len(err_lines), 0) + self.assertEqual(out_lines[-1], "reformatted f2") + self.assertEqual( + unstyle(str(report)), "1 file reformatted, 2 files left unchanged." + ) + self.assertEqual(report.return_code, 0) + report.check = True + self.assertEqual(report.return_code, 1) + report.check = False + report.failed(Path("e1"), "boom") + self.assertEqual(len(out_lines), 1) + self.assertEqual(len(err_lines), 1) + 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.", + ) + self.assertEqual(report.return_code, 123) + report.done(Path("f3"), black.Changed.YES) + self.assertEqual(len(out_lines), 2) + self.assertEqual(len(err_lines), 1) + self.assertEqual(out_lines[-1], "reformatted f3") + self.assertEqual( + unstyle(str(report)), + "2 files reformatted, 2 files left unchanged, 1 file failed to" + " reformat.", + ) + self.assertEqual(report.return_code, 123) + report.failed(Path("e2"), "boom") + self.assertEqual(len(out_lines), 2) + self.assertEqual(len(err_lines), 2) + 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.", + ) + self.assertEqual(report.return_code, 123) + report.path_ignored(Path("wat"), "no match") + self.assertEqual(len(out_lines), 2) + self.assertEqual(len(err_lines), 2) + self.assertEqual( + unstyle(str(report)), + "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) + self.assertEqual(len(out_lines), 2) + self.assertEqual(len(err_lines), 2) + self.assertEqual( + unstyle(str(report)), + "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, 2 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}) - def test_is_python36(self) -> None: + 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(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.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("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") + self.assertEqual(set(), black.get_future_imports(node)) + node = black.lib2to3_parse("from __future__ import black\n") + self.assertEqual({"black"}, black.get_future_imports(node)) + node = black.lib2to3_parse("from __future__ import multiple, imports\n") + self.assertEqual({"multiple", "imports"}, black.get_future_imports(node)) + node = black.lib2to3_parse("from __future__ import (parenthesized, imports)\n") + self.assertEqual({"parenthesized", "imports"}, black.get_future_imports(node)) + node = black.lib2to3_parse( + "from __future__ import multiple\nfrom __future__ import imports\n" + ) + self.assertEqual({"multiple", "imports"}, black.get_future_imports(node)) + node = black.lib2to3_parse("# comment\nfrom __future__ import black\n") + self.assertEqual({"black"}, black.get_future_imports(node)) + node = black.lib2to3_parse('"""docstring"""\nfrom __future__ import black\n') + self.assertEqual({"black"}, black.get_future_imports(node)) + node = black.lib2to3_parse("some(other, code)\nfrom __future__ import black\n") + 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)) def test_debug_visitor(self) -> None: source, _ = read_data("debug_visitor.py") @@ -399,21 +1251,22 @@ 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: @@ -435,13 +1288,804 @@ 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) self.assertTrue("Actual tree:" in out_str) self.assertEqual("".join(err_lines), "") + def test_cache_broken_file(self) -> None: + mode = DEFAULT_MODE + with cache_dir() as workspace: + 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(mode), {}) + src = (workspace / "test.py").resolve() + with src.open("w") as fobj: + fobj.write("print('hello')") + self.invokeBlack([str(src)]) + cache = black.read_cache(mode) + self.assertIn(src, cache) + + def test_cache_single_file_already_cached(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')") + black.write_cache({}, [src], mode) + self.invokeBlack([str(src)]) + with src.open("r") as fobj: + self.assertEqual(fobj.read(), "print('hello')") + + @event_loop() + def test_cache_multiple_files(self) -> None: + mode = DEFAULT_MODE + 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], 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(mode) + self.assertIn(one, cache) + self.assertIn(two, cache) + + def test_no_cache_when_writeback_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')") + self.invokeBlack([str(src), "--diff"]) + cache_file = black.get_cache_file(mode) + self.assertFalse(cache_file.exists()) + + def test_no_cache_when_stdin(self) -> None: + 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(mode) + self.assertFalse(cache_file.exists()) + + def test_read_cache_no_cachefile(self) -> None: + mode = DEFAULT_MODE + with cache_dir(): + self.assertEqual(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) + 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 = DEFAULT_MODE + with cache_dir(exists=False) as workspace: + self.assertFalse(workspace.exists()) + black.write_cache({}, [], mode) + self.assertTrue(workspace.exists()) + + @event_loop() + def test_failed_formatting_does_not_get_cached(self) -> None: + mode = DEFAULT_MODE + 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') + self.invokeBlack([str(workspace)], exit_code=123) + cache = black.read_cache(mode) + self.assertNotIn(failing, cache) + self.assertIn(clean, 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) + + @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() + self.invokeBlack([str(src1), "--diff", "--check"], exit_code=1) + # Files which will not be reformatted. + src2 = (THIS_DIR / "data" / "composition.py").resolve() + self.invokeBlack([str(src2), "--diff", "--check"]) + # Multi file command. + 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. + self.invokeBlack([]) + + 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: + self.skipTest(f"Can't create symlinks: {e}") + self.invokeBlack([str(workspace.resolve())]) + + 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) + self.assertIn(path, one) + two = black.read_cache(short_mode) + self.assertNotIn(path, two) + + def test_tricky_unicode_symbols(self) -> None: + source, expected = read_data("tricky_unicode_symbols") + actual = fs(source) + self.assertFormatEqual(expected, actual) + black.assert_equivalent(source, actual) + black.assert_stable(source, actual, DEFAULT_MODE) + + def test_single_file_force_pyi(self) -> None: + reg_mode = DEFAULT_MODE + 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) + 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(pyi_mode) + self.assertIn(path, pyi_cache) + normal_cache = black.read_cache(reg_mode) + self.assertNotIn(path, normal_cache) + self.assertEqual(actual, expected) + + @event_loop() + def test_multi_file_force_pyi(self) -> None: + reg_mode = DEFAULT_MODE + pyi_mode = replace(DEFAULT_MODE, is_pyi=True) + contents, expected = read_data("force_pyi") + with cache_dir() as workspace: + paths = [ + (workspace / "file1.py").resolve(), + (workspace / "file2.py").resolve(), + ] + for path in paths: + with open(path, "w") as fh: + fh.write(contents) + 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(pyi_mode) + normal_cache = black.read_cache(reg_mode) + for path in paths: + self.assertIn(path, pyi_cache) + self.assertNotIn(path, normal_cache) + + def test_pipe_force_pyi(self) -> None: + source, expected = read_data("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 = DEFAULT_MODE + py36_mode = replace(DEFAULT_MODE, target_versions=black.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) + self.invokeBlack([str(path), *PY36_ARGS]) + with open(path, "r") as fh: + actual = fh.read() + # verify cache with --target-version is separate + py36_cache = black.read_cache(py36_mode) + self.assertIn(path, py36_cache) + normal_cache = black.read_cache(reg_mode) + self.assertNotIn(path, normal_cache) + self.assertEqual(actual, expected) + + @event_loop() + def test_multi_file_force_py36(self) -> None: + reg_mode = DEFAULT_MODE + py36_mode = replace(DEFAULT_MODE, target_versions=black.PY36_VERSIONS) + source, expected = read_data("force_py36") + with cache_dir() as workspace: + paths = [ + (workspace / "file1.py").resolve(), + (workspace / "file2.py").resolve(), + ] + for path in paths: + with open(path, "w") as fh: + fh.write(source) + 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 --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) + + def test_collections(self) -> None: + source, expected = read_data("collections") + actual = fs(source) + self.assertFormatEqual(expected, actual) + black.assert_equivalent(source, actual) + black.assert_stable(source, actual, DEFAULT_MODE) + + def test_pipe_force_py36(self) -> None: + source, expected = read_data("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) + + def test_include_exclude(self) -> None: + path = THIS_DIR / "data" / "include_exclude_tests" + include = re.compile(r"\.pyi?$") + exclude = re.compile(r"/exclude/|/\.definitely_exclude/") + report = black.Report() + gitignore = PathSpec.from_lines("gitwildmatch", []) + sources: List[Path] = [] + expected = [ + Path(path / "b/dont_exclude/a.py"), + Path(path / "b/dont_exclude/a.pyi"), + ] + this_abs = THIS_DIR.resolve() + sources.extend( + black.gen_python_files( + path.iterdir(), this_abs, include, exclude, None, report, gitignore + ) + ) + self.assertEqual(sorted(expected), sorted(sources)) + + @patch("black.find_project_root", lambda *args: THIS_DIR.resolve()) + def test_exclude_for_issue_1572(self) -> None: + # Exclude shouldn't touch files that were explicitly given to Black through the + # CLI. Exclude is supposed to only apply to the recursive discovery of files. + # https://github.com/psf/black/issues/1572 + path = THIS_DIR / "data" / "include_exclude_tests" + include = "" + exclude = r"/exclude/|a\.py" + src = str(path / "b/exclude/a.py") + report = black.Report() + expected = [Path(path / "b/exclude/a.py")] + sources = list( + black.get_sources( + ctx=FakeContext(), + src=(src,), + quiet=True, + verbose=False, + include=include, + exclude=exclude, + force_exclude=None, + report=report, + ) + ) + self.assertEqual(sorted(expected), sorted(sources)) + + def test_gitignore_exclude(self) -> None: + path = THIS_DIR / "data" / "include_exclude_tests" + include = re.compile(r"\.pyi?$") + 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 = [ + Path(path / "b/exclude/a.pie"), + Path(path / "b/exclude/a.py"), + Path(path / "b/exclude/a.pyi"), + Path(path / "b/dont_exclude/a.pie"), + Path(path / "b/dont_exclude/a.py"), + Path(path / "b/dont_exclude/a.pyi"), + Path(path / "b/.definitely_exclude/a.pie"), + Path(path / "b/.definitely_exclude/a.py"), + Path(path / "b/.definitely_exclude/a.pyi"), + ] + this_abs = THIS_DIR.resolve() + sources.extend( + black.gen_python_files( + path.iterdir(), + this_abs, + empty, + re.compile(black.DEFAULT_EXCLUDES), + None, + report, + gitignore, + ) + ) + self.assertEqual(sorted(expected), sorted(sources)) + + 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 = [ + 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"), + ] + this_abs = THIS_DIR.resolve() + sources.extend( + 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"]: + self.invokeBlack(["-", option, "**()(!!*)"], exit_code=2) + + 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 = runner.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_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" + child.is_symlink.return_value = True + try: + list( + black.gen_python_files( + path.iterdir(), root, include, exclude, None, report, gitignore + ) + ) + except ValueError as 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() + # `child` should behave like a strange file which resolved path is clearly + # outside of the `root` directory. + child.is_symlink.return_value = False + with self.assertRaises(ValueError): + 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() + self.assertEqual(child.resolve.call_count, 2) + child.is_symlink.assert_called() + self.assertEqual(child.is_symlink.call_count, 2) + + def test_shhh_click(self) -> None: + try: + from click import _unicodefun # type: ignore + except ModuleNotFoundError: + self.skipTest("Incompatible Click version") + if not hasattr(_unicodefun, "_verify_python3_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_python3_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_python3_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_FILE) + + @unittest.skipUnless(has_blackd_deps, "blackd's dependencies are not installed") + def test_blackd_main(self) -> None: + with patch("blackd.web.run_app"): + result = CliRunner().invoke(blackd.main, []) + if result.exception is not None: + raise result.exception + self.assertEqual(result.exit_code, 0) + + 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()) + + +class BlackDTestCase(AioHTTPTestCase): + async def get_application(self) -> web.Application: + return blackd.make_app() + + # TODO: remove these decorators once the below is released + # https://github.com/aio-libs/aiohttp/pull/3727 + @skip_if_exception("ClientOSError") + @unittest.skipUnless(has_blackd_deps, "blackd's dependencies are not installed") + @unittest_run_loop + async def test_blackd_request_needs_formatting(self) -> None: + response = await self.client.post("/", data=b"print('hello world')") + self.assertEqual(response.status, 200) + self.assertEqual(response.charset, "utf8") + self.assertEqual(await response.read(), b'print("hello world")\n') + + @skip_if_exception("ClientOSError") + @unittest.skipUnless(has_blackd_deps, "blackd's dependencies are not installed") + @unittest_run_loop + async def test_blackd_request_no_change(self) -> None: + response = await self.client.post("/", data=b'print("hello world")\n') + self.assertEqual(response.status, 204) + self.assertEqual(await response.read(), b"") + + @skip_if_exception("ClientOSError") + @unittest.skipUnless(has_blackd_deps, "blackd's dependencies are not installed") + @unittest_run_loop + async def test_blackd_request_syntax_error(self) -> None: + response = await self.client.post("/", data=b"what even ( is") + self.assertEqual(response.status, 400) + content = await response.text() + self.assertTrue( + content.startswith("Cannot parse"), + msg=f"Expected error to start with 'Cannot parse', got {repr(content)}", + ) + + @skip_if_exception("ClientOSError") + @unittest.skipUnless(has_blackd_deps, "blackd's dependencies are not installed") + @unittest_run_loop + async def test_blackd_unsupported_version(self) -> None: + response = await self.client.post( + "/", data=b"what", headers={blackd.PROTOCOL_VERSION_HEADER: "2"} + ) + self.assertEqual(response.status, 501) + + @skip_if_exception("ClientOSError") + @unittest.skipUnless(has_blackd_deps, "blackd's dependencies are not installed") + @unittest_run_loop + async def test_blackd_supported_version(self) -> None: + response = await self.client.post( + "/", data=b"what", headers={blackd.PROTOCOL_VERSION_HEADER: "1"} + ) + self.assertEqual(response.status, 200) + + @skip_if_exception("ClientOSError") + @unittest.skipUnless(has_blackd_deps, "blackd's dependencies are not installed") + @unittest_run_loop + async def test_blackd_invalid_python_variant(self) -> None: + async def check(header_value: str, expected_status: int = 400) -> None: + response = await self.client.post( + "/", data=b"what", headers={blackd.PYTHON_VARIANT_HEADER: header_value} + ) + self.assertEqual(response.status, expected_status) + + await check("lol") + await check("ruby3.5") + await check("pyi3.6") + await check("py1.5") + await check("2.8") + await check("py2.8") + await check("3.0") + await check("pypy3.0") + await check("jython3.4") + + @skip_if_exception("ClientOSError") + @unittest.skipUnless(has_blackd_deps, "blackd's dependencies are not installed") + @unittest_run_loop + async def test_blackd_pyi(self) -> None: + source, expected = read_data("stub.pyi") + response = await self.client.post( + "/", data=source, headers={blackd.PYTHON_VARIANT_HEADER: "pyi"} + ) + self.assertEqual(response.status, 200) + self.assertEqual(await response.text(), expected) + + @skip_if_exception("ClientOSError") + @unittest.skipUnless(has_blackd_deps, "blackd's dependencies are not installed") + @unittest_run_loop + async def test_blackd_diff(self) -> None: + diff_header = re.compile( + r"(In|Out)\t\d\d\d\d-\d\d-\d\d \d\d:\d\d:\d\d\.\d\d\d\d\d\d \+\d\d\d\d" + ) + + source, _ = read_data("blackd_diff.py") + expected, _ = read_data("blackd_diff.diff") + + response = await self.client.post( + "/", data=source, headers={blackd.DIFF_HEADER: "true"} + ) + self.assertEqual(response.status, 200) + + actual = await response.text() + actual = diff_header.sub(DETERMINISTIC_HEADER, actual) + self.assertEqual(actual, expected) + + @skip_if_exception("ClientOSError") + @unittest.skipUnless(has_blackd_deps, "blackd's dependencies are not installed") + @unittest_run_loop + async def test_blackd_python_variant(self) -> None: + code = ( + "def f(\n" + " and_has_a_bunch_of,\n" + " very_long_arguments_too,\n" + " and_lots_of_them_as_well_lol,\n" + " **and_very_long_keyword_arguments\n" + "):\n" + " pass\n" + ) + + async def check(header_value: str, expected_status: int) -> None: + response = await self.client.post( + "/", data=code, headers={blackd.PYTHON_VARIANT_HEADER: header_value} + ) + self.assertEqual( + response.status, expected_status, msg=await response.text() + ) + + await check("3.6", 200) + await check("py3.6", 200) + await check("3.6,3.7", 200) + await check("3.6,py3.7", 200) + await check("py36,py37", 200) + await check("36", 200) + await check("3.6.4", 200) + + await check("2", 204) + await check("2.7", 204) + await check("py2.7", 204) + await check("3.4", 204) + await check("py3.4", 204) + await check("py34,py36", 204) + await check("34", 204) + + @skip_if_exception("ClientOSError") + @unittest.skipUnless(has_blackd_deps, "blackd's dependencies are not installed") + @unittest_run_loop + async def test_blackd_line_length(self) -> None: + response = await self.client.post( + "/", data=b'print("hello")\n', headers={blackd.LINE_LENGTH_HEADER: "7"} + ) + self.assertEqual(response.status, 200) + + @skip_if_exception("ClientOSError") + @unittest.skipUnless(has_blackd_deps, "blackd's dependencies are not installed") + @unittest_run_loop + async def test_blackd_invalid_line_length(self) -> None: + response = await self.client.post( + "/", data=b'print("hello")\n', headers={blackd.LINE_LENGTH_HEADER: "NaN"} + ) + self.assertEqual(response.status, 400) + + @skip_if_exception("ClientOSError") + @unittest.skipUnless(has_blackd_deps, "blackd's dependencies are not installed") + @unittest_run_loop + async def test_blackd_response_black_version_header(self) -> None: + response = await self.client.post("/") + self.assertIsNotNone(response.headers.get(blackd.BLACK_VERSION_HEADER)) + + +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 + 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() + unittest.main(module="test_black")