+ 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.output._out", out), patch("black.output._err", err):
+ report.done(Path("f1"), black.Changed.NO)
+ self.assertEqual(len(out_lines), 0)
+ self.assertEqual(len(err_lines), 0)
+ 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, 3 files would be left unchanged, 2"
+ " files would fail to reformat.",
+ )
+ report.check = False
+ report.diff = True
+ self.assertEqual(
+ unstyle(str(report)),
+ "2 files would be reformatted, 3 files would be left unchanged, 2"
+ " files would fail to reformat.",
+ )
+
+ def test_lib2to3_parse(self) -> None:
+ with self.assertRaises(black.InvalidInput):
+ black.lib2to3_parse("invalid syntax")
+
+ straddling = "x + y"
+ black.lib2to3_parse(straddling)
+ black.lib2to3_parse(straddling, {TargetVersion.PY36})
+
+ py2_only = "print x"
+ with self.assertRaises(black.InvalidInput):
+ black.lib2to3_parse(py2_only, {TargetVersion.PY36})
+
+ py3_only = "exec(x, end=y)"
+ black.lib2to3_parse(py3_only)
+ black.lib2to3_parse(py3_only, {TargetVersion.PY36})
+
+ def test_get_features_used_decorator(self) -> None:
+ # Test the feature detection of new decorator syntax
+ # since this makes some test cases of test_get_features_used()
+ # fails if it fails, this is tested first so that a useful case
+ # is identified
+ simples, relaxed = read_data("miscellaneous", "decorators")
+ # skip explanation comments at the top of the file
+ for simple_test in simples.split("##")[1:]:
+ node = black.lib2to3_parse(simple_test)
+ decorator = str(node.children[0].children[0]).strip()
+ self.assertNotIn(
+ Feature.RELAXED_DECORATORS,
+ black.get_features_used(node),
+ msg=(
+ f"decorator '{decorator}' follows python<=3.8 syntax"
+ "but is detected as 3.9+"
+ # f"The full node is\n{node!r}"
+ ),
+ )
+ # skip the '# output' comment at the top of the output part
+ for relaxed_test in relaxed.split("##")[1:]:
+ node = black.lib2to3_parse(relaxed_test)
+ decorator = str(node.children[0].children[0]).strip()
+ self.assertIn(
+ Feature.RELAXED_DECORATORS,
+ black.get_features_used(node),
+ msg=(
+ f"decorator '{decorator}' uses python3.9+ syntax"
+ "but is detected as python<=3.8"
+ # f"The full node is\n{node!r}"
+ ),
+ )
+
+ def test_get_features_used(self) -> None:
+ node = black.lib2to3_parse("def f(*, arg): ...\n")
+ self.assertEqual(black.get_features_used(node), set())
+ node = black.lib2to3_parse("def f(*, arg,): ...\n")
+ 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.assertEqual(black.get_features_used(node), {Feature.F_STRINGS})
+ node = black.lib2to3_parse("123_456\n")
+ self.assertEqual(black.get_features_used(node), {Feature.NUMERIC_UNDERSCORES})
+ node = black.lib2to3_parse("123456\n")
+ self.assertEqual(black.get_features_used(node), set())
+ source, expected = read_data("simple_cases", "function")
+ node = black.lib2to3_parse(source)
+ 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.assertEqual(black.get_features_used(node), expected_features)
+ source, expected = read_data("simple_cases", "expression")
+ node = black.lib2to3_parse(source)
+ self.assertEqual(black.get_features_used(node), set())
+ node = black.lib2to3_parse(expected)
+ self.assertEqual(black.get_features_used(node), set())
+ node = black.lib2to3_parse("lambda a, /, b: ...")
+ self.assertEqual(black.get_features_used(node), {Feature.POS_ONLY_ARGUMENTS})
+ node = black.lib2to3_parse("def fn(a, /, b): ...")
+ self.assertEqual(black.get_features_used(node), {Feature.POS_ONLY_ARGUMENTS})
+ node = black.lib2to3_parse("def fn(): yield a, b")
+ self.assertEqual(black.get_features_used(node), set())
+ node = black.lib2to3_parse("def fn(): return a, b")
+ self.assertEqual(black.get_features_used(node), set())
+ node = black.lib2to3_parse("def fn(): yield *b, c")
+ self.assertEqual(black.get_features_used(node), {Feature.UNPACKING_ON_FLOW})
+ node = black.lib2to3_parse("def fn(): return a, *b, c")
+ self.assertEqual(black.get_features_used(node), {Feature.UNPACKING_ON_FLOW})
+ node = black.lib2to3_parse("x = a, *b, c")
+ self.assertEqual(black.get_features_used(node), set())
+ node = black.lib2to3_parse("x: Any = regular")
+ self.assertEqual(black.get_features_used(node), set())
+ node = black.lib2to3_parse("x: Any = (regular, regular)")
+ self.assertEqual(black.get_features_used(node), set())
+ node = black.lib2to3_parse("x: Any = Complex(Type(1))[something]")
+ self.assertEqual(black.get_features_used(node), set())
+ node = black.lib2to3_parse("x: Tuple[int, ...] = a, b, c")
+ self.assertEqual(
+ black.get_features_used(node), {Feature.ANN_ASSIGN_EXTENDED_RHS}
+ )
+ node = black.lib2to3_parse("try: pass\nexcept Something: pass")
+ self.assertEqual(black.get_features_used(node), set())
+ node = black.lib2to3_parse("try: pass\nexcept (*Something,): pass")
+ self.assertEqual(black.get_features_used(node), set())
+ node = black.lib2to3_parse("try: pass\nexcept *Group: pass")
+ self.assertEqual(black.get_features_used(node), {Feature.EXCEPT_STAR})
+ node = black.lib2to3_parse("a[*b]")
+ self.assertEqual(black.get_features_used(node), {Feature.VARIADIC_GENERICS})
+ node = black.lib2to3_parse("a[x, *y(), z] = t")
+ self.assertEqual(black.get_features_used(node), {Feature.VARIADIC_GENERICS})
+ node = black.lib2to3_parse("def fn(*args: *T): pass")
+ self.assertEqual(black.get_features_used(node), {Feature.VARIADIC_GENERICS})
+
+ def test_get_features_used_for_future_flags(self) -> None:
+ for src, features in [
+ ("from __future__ import annotations", {Feature.FUTURE_ANNOTATIONS}),
+ (
+ "from __future__ import (other, annotations)",
+ {Feature.FUTURE_ANNOTATIONS},
+ ),
+ ("a = 1 + 2\nfrom something import annotations", set()),
+ ("from __future__ import x, y", set()),
+ ]:
+ with self.subTest(src=src, features=features):
+ node = black.lib2to3_parse(src)
+ future_imports = black.get_future_imports(node)
+ self.assertEqual(
+ black.get_features_used(node, future_imports=future_imports),
+ features,
+ )
+
+ def test_get_future_imports(self) -> None:
+ node = black.lib2to3_parse("\n")
+ 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))
+
+ @pytest.mark.incompatible_with_mypyc
+ def test_debug_visitor(self) -> None:
+ source, _ = read_data("miscellaneous", "debug_visitor")
+ expected, _ = read_data("miscellaneous", "debug_visitor.out")
+ 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.debug.out", out):
+ DebugVisitor.show(source)
+ actual = "\n".join(out_lines) + "\n"
+ log_name = ""
+ if expected != actual:
+ log_name = black.dump_to_file(*out_lines)
+ self.assertEqual(
+ expected,
+ actual,
+ f"AST print out is different. Actual version dumped to {log_name}",
+ )
+
+ def test_format_file_contents(self) -> None:
+ mode = DEFAULT_MODE
+ empty = ""
+ with self.assertRaises(black.NothingChanged):
+ black.format_file_contents(empty, mode=mode, fast=False)
+ just_nl = "\n"
+ with self.assertRaises(black.NothingChanged):
+ 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, mode=mode, fast=False)
+ different = "j = [1,2,3]"
+ expected = same
+ actual = black.format_file_contents(different, mode=mode, fast=False)
+ self.assertEqual(expected, actual)
+ invalid = "return if you can"
+ 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")
+
+ mode = black.Mode(preview=True)
+ just_crlf = "\r\n"
+ with self.assertRaises(black.NothingChanged):
+ black.format_file_contents(just_crlf, mode=mode, fast=False)
+ just_whitespace_nl = "\n\t\n \n\t \n \t\n\n"
+ actual = black.format_file_contents(just_whitespace_nl, mode=mode, fast=False)
+ self.assertEqual("\n", actual)
+ just_whitespace_crlf = "\r\n\t\r\n \r\n\t \r\n \t\r\n\r\n"
+ actual = black.format_file_contents(just_whitespace_crlf, mode=mode, fast=False)
+ self.assertEqual("\r\n", actual)
+
+ def test_endmarker(self) -> None:
+ n = black.lib2to3_parse("\n")
+ self.assertEqual(n.type, black.syms.file_input)
+ self.assertEqual(len(n.children), 1)
+ self.assertEqual(n.children[0].type, black.token.ENDMARKER)
+
+ @pytest.mark.incompatible_with_mypyc
+ @unittest.skipIf(os.environ.get("SKIP_AST_PRINT"), "user set SKIP_AST_PRINT")
+ def test_assertFormatEqual(self) -> None:
+ out_lines = []
+ 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.output._out", out), patch("black.output._err", err):
+ with self.assertRaises(AssertionError):
+ self.assertFormatEqual("j = [1, 2, 3]", "j = [1, 2, 3,]")
+
+ out_str = "".join(out_lines)
+ self.assertIn("Expected tree:", out_str)
+ self.assertIn("Actual tree:", out_str)
+ self.assertEqual("".join(err_lines), "")
+
+ @event_loop()
+ @patch("concurrent.futures.ProcessPoolExecutor", MagicMock(side_effect=OSError))
+ def test_works_in_mono_process_only_environment(self) -> None:
+ with cache_dir() as workspace:
+ for f in [
+ (workspace / "one.py").resolve(),
+ (workspace / "two.py").resolve(),
+ ]:
+ f.write_text('print("hello")\n', encoding="utf-8")
+ self.invokeBlack([str(workspace)])
+
+ @event_loop()
+ def test_check_diff_use_together(self) -> None:
+ with cache_dir():
+ # Files which will be reformatted.
+ src1 = get_case_path("miscellaneous", "string_quotes")
+ self.invokeBlack([str(src1), "--diff", "--check"], exit_code=1)
+ # Files which will not be reformatted.
+ src2 = get_case_path("simple_cases", "composition")
+ self.invokeBlack([str(src2), "--diff", "--check"])
+ # Multi file command.
+ self.invokeBlack([str(src1), str(src2), "--diff", "--check"], exit_code=1)
+
+ def test_no_src_fails(self) -> None:
+ with cache_dir():
+ self.invokeBlack([], exit_code=1)
+
+ def test_src_and_code_fails(self) -> None:
+ with cache_dir():
+ self.invokeBlack([".", "-c", "0"], exit_code=1)
+
+ def test_broken_symlink(self) -> None:
+ with cache_dir() as workspace:
+ symlink = workspace / "broken_link.py"
+ try:
+ symlink.symlink_to("nonexistent.py")
+ except (OSError, NotImplementedError) as e:
+ self.skipTest(f"Can't create symlinks: {e}")
+ self.invokeBlack([str(workspace.resolve())])
+
+ def test_single_file_force_pyi(self) -> None:
+ pyi_mode = replace(DEFAULT_MODE, is_pyi=True)
+ contents, expected = read_data("miscellaneous", "force_pyi")
+ with cache_dir() as workspace:
+ path = (workspace / "file.py").resolve()
+ path.write_text(contents, encoding="utf-8")
+ self.invokeBlack([str(path), "--pyi"])
+ actual = path.read_text(encoding="utf-8")
+ # verify cache with --pyi is separate
+ pyi_cache = black.Cache.read(pyi_mode)
+ assert not pyi_cache.is_changed(path)
+ normal_cache = black.Cache.read(DEFAULT_MODE)
+ assert normal_cache.is_changed(path)
+ self.assertFormatEqual(expected, actual)
+ black.assert_equivalent(contents, actual)
+ black.assert_stable(contents, actual, pyi_mode)
+
+ @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("miscellaneous", "force_pyi")
+ with cache_dir() as workspace:
+ paths = [
+ (workspace / "file1.py").resolve(),
+ (workspace / "file2.py").resolve(),
+ ]
+ for path in paths:
+ path.write_text(contents, encoding="utf-8")
+ self.invokeBlack([str(p) for p in paths] + ["--pyi"])
+ for path in paths:
+ actual = path.read_text(encoding="utf-8")
+ self.assertEqual(actual, expected)
+ # verify cache with --pyi is separate
+ pyi_cache = black.Cache.read(pyi_mode)
+ normal_cache = black.Cache.read(reg_mode)
+ for path in paths:
+ assert not pyi_cache.is_changed(path)
+ assert normal_cache.is_changed(path)
+
+ def test_pipe_force_pyi(self) -> None:
+ source, expected = read_data("miscellaneous", "force_pyi")
+ result = CliRunner().invoke(
+ black.main, ["-", "-q", "--pyi"], input=BytesIO(source.encode("utf-8"))
+ )
+ 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=PY36_VERSIONS)
+ source, expected = read_data("miscellaneous", "force_py36")
+ with cache_dir() as workspace:
+ path = (workspace / "file.py").resolve()
+ path.write_text(source, encoding="utf-8")
+ self.invokeBlack([str(path), *PY36_ARGS])
+ actual = path.read_text(encoding="utf-8")
+ # verify cache with --target-version is separate
+ py36_cache = black.Cache.read(py36_mode)
+ assert not py36_cache.is_changed(path)
+ normal_cache = black.Cache.read(reg_mode)
+ assert normal_cache.is_changed(path)
+ 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=PY36_VERSIONS)
+ source, expected = read_data("miscellaneous", "force_py36")
+ with cache_dir() as workspace:
+ paths = [
+ (workspace / "file1.py").resolve(),
+ (workspace / "file2.py").resolve(),
+ ]
+ for path in paths:
+ path.write_text(source, encoding="utf-8")
+ self.invokeBlack([str(p) for p in paths] + PY36_ARGS)
+ for path in paths:
+ actual = path.read_text(encoding="utf-8")
+ self.assertEqual(actual, expected)
+ # verify cache with --target-version is separate
+ pyi_cache = black.Cache.read(py36_mode)
+ normal_cache = black.Cache.read(reg_mode)
+ for path in paths:
+ assert not pyi_cache.is_changed(path)
+ assert normal_cache.is_changed(path)
+
+ def test_pipe_force_py36(self) -> None:
+ source, expected = read_data("miscellaneous", "force_py36")
+ result = CliRunner().invoke(
+ black.main,
+ ["-", "-q", "--target-version=py36"],
+ input=BytesIO(source.encode("utf-8")),
+ )
+ self.assertEqual(result.exit_code, 0)
+ actual = result.output
+ self.assertFormatEqual(actual, expected)
+
+ @pytest.mark.incompatible_with_mypyc
+ def test_reformat_one_with_stdin(self) -> None:
+ with patch(
+ "black.format_stdin_to_stdout",
+ return_value=lambda *args, **kwargs: black.Changed.YES,
+ ) as fsts:
+ report = MagicMock()
+ path = Path("-")
+ black.reformat_one(
+ path,
+ fast=True,
+ write_back=black.WriteBack.YES,
+ mode=DEFAULT_MODE,
+ report=report,
+ )
+ fsts.assert_called_once()
+ report.done.assert_called_with(path, black.Changed.YES)
+
+ @pytest.mark.incompatible_with_mypyc
+ def test_reformat_one_with_stdin_filename(self) -> None:
+ with patch(
+ "black.format_stdin_to_stdout",
+ return_value=lambda *args, **kwargs: black.Changed.YES,
+ ) as fsts:
+ report = MagicMock()
+ p = "foo.py"
+ path = Path(f"__BLACK_STDIN_FILENAME__{p}")
+ expected = Path(p)
+ black.reformat_one(
+ path,
+ fast=True,
+ write_back=black.WriteBack.YES,
+ mode=DEFAULT_MODE,
+ report=report,
+ )
+ fsts.assert_called_once_with(
+ fast=True, write_back=black.WriteBack.YES, mode=DEFAULT_MODE
+ )
+ # __BLACK_STDIN_FILENAME__ should have been stripped
+ report.done.assert_called_with(expected, black.Changed.YES)
+
+ @pytest.mark.incompatible_with_mypyc
+ def test_reformat_one_with_stdin_filename_pyi(self) -> None:
+ with patch(
+ "black.format_stdin_to_stdout",
+ return_value=lambda *args, **kwargs: black.Changed.YES,
+ ) as fsts:
+ report = MagicMock()
+ p = "foo.pyi"
+ path = Path(f"__BLACK_STDIN_FILENAME__{p}")
+ expected = Path(p)
+ black.reformat_one(
+ path,
+ fast=True,
+ write_back=black.WriteBack.YES,
+ mode=DEFAULT_MODE,
+ report=report,
+ )
+ fsts.assert_called_once_with(
+ fast=True,
+ write_back=black.WriteBack.YES,
+ mode=replace(DEFAULT_MODE, is_pyi=True),
+ )
+ # __BLACK_STDIN_FILENAME__ should have been stripped
+ report.done.assert_called_with(expected, black.Changed.YES)
+
+ @pytest.mark.incompatible_with_mypyc
+ def test_reformat_one_with_stdin_filename_ipynb(self) -> None:
+ with patch(
+ "black.format_stdin_to_stdout",
+ return_value=lambda *args, **kwargs: black.Changed.YES,
+ ) as fsts:
+ report = MagicMock()
+ p = "foo.ipynb"
+ path = Path(f"__BLACK_STDIN_FILENAME__{p}")
+ expected = Path(p)
+ black.reformat_one(
+ path,
+ fast=True,
+ write_back=black.WriteBack.YES,
+ mode=DEFAULT_MODE,
+ report=report,
+ )
+ fsts.assert_called_once_with(
+ fast=True,
+ write_back=black.WriteBack.YES,
+ mode=replace(DEFAULT_MODE, is_ipynb=True),
+ )
+ # __BLACK_STDIN_FILENAME__ should have been stripped
+ report.done.assert_called_with(expected, black.Changed.YES)
+
+ @pytest.mark.incompatible_with_mypyc
+ def test_reformat_one_with_stdin_and_existing_path(self) -> None:
+ with patch(
+ "black.format_stdin_to_stdout",
+ return_value=lambda *args, **kwargs: black.Changed.YES,
+ ) as fsts:
+ report = MagicMock()
+ # Even with an existing file, since we are forcing stdin, black
+ # should output to stdout and not modify the file inplace
+ p = THIS_DIR / "data" / "simple_cases" / "collections.py"
+ # Make sure is_file actually returns True
+ self.assertTrue(p.is_file())
+ path = Path(f"__BLACK_STDIN_FILENAME__{p}")
+ expected = Path(p)
+ black.reformat_one(
+ path,
+ fast=True,
+ write_back=black.WriteBack.YES,
+ mode=DEFAULT_MODE,
+ report=report,
+ )
+ fsts.assert_called_once()
+ # __BLACK_STDIN_FILENAME__ should have been stripped
+ report.done.assert_called_with(expected, black.Changed.YES)
+
+ def test_reformat_one_with_stdin_empty(self) -> None:
+ cases = [
+ ("", ""),
+ ("\n", "\n"),
+ ("\r\n", "\r\n"),
+ (" \t", ""),
+ (" \t\n\t ", "\n"),
+ (" \t\r\n\t ", "\r\n"),
+ ]
+
+ def _new_wrapper(
+ output: io.StringIO, io_TextIOWrapper: Type[io.TextIOWrapper]
+ ) -> Callable[[Any, Any], io.TextIOWrapper]:
+ def get_output(*args: Any, **kwargs: Any) -> io.TextIOWrapper:
+ if args == (sys.stdout.buffer,):
+ # It's `format_stdin_to_stdout()` calling `io.TextIOWrapper()`,
+ # return our mock object.
+ return output
+ # It's something else (i.e. `decode_bytes()`) calling
+ # `io.TextIOWrapper()`, pass through to the original implementation.
+ # See discussion in https://github.com/psf/black/pull/2489
+ return io_TextIOWrapper(*args, **kwargs)
+
+ return get_output
+
+ mode = black.Mode(preview=True)
+ for content, expected in cases:
+ output = io.StringIO()
+ io_TextIOWrapper = io.TextIOWrapper
+
+ with patch("io.TextIOWrapper", _new_wrapper(output, io_TextIOWrapper)):
+ try:
+ black.format_stdin_to_stdout(
+ fast=True,
+ content=content,
+ write_back=black.WriteBack.YES,
+ mode=mode,
+ )
+ except io.UnsupportedOperation:
+ pass # StringIO does not support detach
+ assert output.getvalue() == expected
+
+ # An empty string is the only test case for `preview=False`
+ output = io.StringIO()
+ io_TextIOWrapper = io.TextIOWrapper
+ with patch("io.TextIOWrapper", _new_wrapper(output, io_TextIOWrapper)):
+ try:
+ black.format_stdin_to_stdout(
+ fast=True,
+ content="",
+ write_back=black.WriteBack.YES,
+ mode=DEFAULT_MODE,
+ )
+ except io.UnsupportedOperation:
+ pass # StringIO does not support detach
+ assert output.getvalue() == ""
+
+ def test_invalid_cli_regex(self) -> None:
+ for option in ["--include", "--exclude", "--extend-exclude", "--force-exclude"]:
+ self.invokeBlack(["-", option, "**()(!!*)"], exit_code=2)
+
+ def test_required_version_matches_version(self) -> None:
+ self.invokeBlack(
+ ["--required-version", black.__version__, "-c", "0"],
+ exit_code=0,
+ ignore_config=True,
+ )
+
+ def test_required_version_matches_partial_version(self) -> None:
+ self.invokeBlack(
+ ["--required-version", black.__version__.split(".")[0], "-c", "0"],
+ exit_code=0,
+ ignore_config=True,
+ )
+
+ def test_required_version_does_not_match_on_minor_version(self) -> None:
+ self.invokeBlack(
+ ["--required-version", black.__version__.split(".")[0] + ".999", "-c", "0"],
+ exit_code=1,
+ ignore_config=True,
+ )
+
+ def test_required_version_does_not_match_version(self) -> None:
+ result = BlackRunner().invoke(
+ black.main,
+ ["--required-version", "20.99b", "-c", "0"],
+ )
+ self.assertEqual(result.exit_code, 1)
+ self.assertIn("required version", result.stderr)
+
+ def test_preserves_line_endings(self) -> None:
+ with TemporaryDirectory() as workspace:
+ test_file = Path(workspace) / "test.py"
+ for nl in ["\n", "\r\n"]:
+ contents = nl.join(["def f( ):", " pass"])
+ test_file.write_bytes(contents.encode())
+ ff(test_file, write_back=black.WriteBack.YES)
+ updated_contents: bytes = test_file.read_bytes()
+ self.assertIn(nl.encode(), updated_contents)
+ if nl == "\n":
+ self.assertNotIn(b"\r\n", updated_contents)
+
+ def test_preserves_line_endings_via_stdin(self) -> None:
+ for nl in ["\n", "\r\n"]:
+ contents = nl.join(["def f( ):", " pass"])
+ runner = BlackRunner()
+ result = runner.invoke(
+ black.main, ["-", "--fast"], input=BytesIO(contents.encode("utf-8"))
+ )
+ self.assertEqual(result.exit_code, 0)
+ output = result.stdout_bytes
+ self.assertIn(nl.encode("utf-8"), output)
+ if nl == "\n":
+ self.assertNotIn(b"\r\n", output)
+
+ def test_normalize_line_endings(self) -> None:
+ with TemporaryDirectory() as workspace:
+ test_file = Path(workspace) / "test.py"
+ for data, expected in (
+ (b"c\r\nc\n ", b"c\r\nc\r\n"),
+ (b"l\nl\r\n ", b"l\nl\n"),
+ ):
+ test_file.write_bytes(data)
+ ff(test_file, write_back=black.WriteBack.YES)
+ self.assertEqual(test_file.read_bytes(), expected)
+
+ def test_assert_equivalent_different_asts(self) -> None:
+ with self.assertRaises(AssertionError):
+ black.assert_equivalent("{}", "None")
+
+ def test_root_logger_not_used_directly(self) -> None:
+ def fail(*args: Any, **kwargs: Any) -> None:
+ self.fail("Record created with root logger")
+
+ with patch.multiple(
+ logging.root,
+ debug=fail,
+ info=fail,
+ warning=fail,
+ error=fail,
+ critical=fail,
+ log=fail,
+ ):
+ ff(THIS_DIR / "util.py")
+
+ def test_invalid_config_return_code(self) -> None:
+ tmp_file = Path(black.dump_to_file())
+ try:
+ tmp_config = Path(black.dump_to_file())
+ tmp_config.unlink()
+ args = ["--config", str(tmp_config), str(tmp_file)]
+ self.invokeBlack(args, exit_code=2, ignore_config=False)
+ finally:
+ tmp_file.unlink()
+
+ def test_parse_pyproject_toml(self) -> None:
+ test_toml_file = THIS_DIR / "test.toml"
+ config = black.parse_pyproject_toml(str(test_toml_file))
+ self.assertEqual(config["verbose"], 1)
+ self.assertEqual(config["check"], "no")
+ self.assertEqual(config["diff"], "y")
+ self.assertEqual(config["color"], True)
+ self.assertEqual(config["line_length"], 79)
+ self.assertEqual(config["target_version"], ["py36", "py37", "py38"])
+ self.assertEqual(config["python_cell_magics"], ["custom1", "custom2"])
+ self.assertEqual(config["exclude"], r"\.pyi?$")
+ self.assertEqual(config["include"], r"\.py?$")
+
+ def test_parse_pyproject_toml_project_metadata(self) -> None:
+ for test_toml, expected in [
+ ("only_black_pyproject.toml", ["py310"]),
+ ("only_metadata_pyproject.toml", ["py37", "py38", "py39", "py310"]),
+ ("neither_pyproject.toml", None),
+ ("both_pyproject.toml", ["py310"]),
+ ]:
+ test_toml_file = THIS_DIR / "data" / "project_metadata" / test_toml
+ config = black.parse_pyproject_toml(str(test_toml_file))
+ self.assertEqual(config.get("target_version"), expected)
+
+ def test_infer_target_version(self) -> None:
+ for version, expected in [
+ ("3.6", [TargetVersion.PY36]),
+ ("3.11.0rc1", [TargetVersion.PY311]),
+ (">=3.10", [TargetVersion.PY310, TargetVersion.PY311, TargetVersion.PY312]),
+ (
+ ">=3.10.6",
+ [TargetVersion.PY310, TargetVersion.PY311, TargetVersion.PY312],
+ ),
+ ("<3.6", [TargetVersion.PY33, TargetVersion.PY34, TargetVersion.PY35]),
+ (">3.7,<3.10", [TargetVersion.PY38, TargetVersion.PY39]),
+ (
+ ">3.7,!=3.8,!=3.9",
+ [TargetVersion.PY310, TargetVersion.PY311, TargetVersion.PY312],
+ ),
+ (
+ "> 3.9.4, != 3.10.3",
+ [
+ TargetVersion.PY39,
+ TargetVersion.PY310,
+ TargetVersion.PY311,
+ TargetVersion.PY312,
+ ],
+ ),
+ (
+ "!=3.3,!=3.4",
+ [
+ TargetVersion.PY35,
+ TargetVersion.PY36,
+ TargetVersion.PY37,
+ TargetVersion.PY38,
+ TargetVersion.PY39,
+ TargetVersion.PY310,
+ TargetVersion.PY311,
+ TargetVersion.PY312,
+ ],
+ ),
+ (
+ "==3.*",
+ [
+ TargetVersion.PY33,
+ TargetVersion.PY34,
+ TargetVersion.PY35,
+ TargetVersion.PY36,
+ TargetVersion.PY37,
+ TargetVersion.PY38,
+ TargetVersion.PY39,
+ TargetVersion.PY310,
+ TargetVersion.PY311,
+ TargetVersion.PY312,
+ ],
+ ),
+ ("==3.8.*", [TargetVersion.PY38]),
+ (None, None),
+ ("", None),
+ ("invalid", None),
+ ("==invalid", None),
+ (">3.9,!=invalid", None),
+ ("3", None),
+ ("3.2", None),
+ ("2.7.18", None),
+ ("==2.7", None),
+ (">3.10,<3.11", None),
+ ]:
+ test_toml = {"project": {"requires-python": version}}
+ result = black.files.infer_target_version(test_toml)
+ self.assertEqual(result, expected)
+
+ 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_read_pyproject_toml_from_stdin(self) -> None:
+ with TemporaryDirectory() as workspace:
+ root = Path(workspace)
+
+ src_dir = root / "src"
+ src_dir.mkdir()
+
+ src_pyproject = src_dir / "pyproject.toml"
+ src_pyproject.touch()
+
+ test_toml_content = (THIS_DIR / "test.toml").read_text(encoding="utf-8")
+ src_pyproject.write_text(test_toml_content, encoding="utf-8")
+
+ src_python = src_dir / "foo.py"
+ src_python.touch()
+
+ fake_ctx = FakeContext()
+ fake_ctx.params["src"] = ("-",)
+ fake_ctx.params["stdin_filename"] = str(src_python)
+
+ with change_directory(root):
+ black.read_pyproject_toml(fake_ctx, FakeParameter(), None)
+
+ config = fake_ctx.default_map
+ self.assertEqual(config["verbose"], "1")
+ self.assertEqual(config["check"], "no")
+ self.assertEqual(config["diff"], "y")
+ self.assertEqual(config["color"], "True")
+ self.assertEqual(config["line_length"], "79")
+ self.assertEqual(config["target_version"], ["py36", "py37", "py38"])
+ self.assertEqual(config["exclude"], r"\.pyi?$")
+ self.assertEqual(config["include"], r"\.py?$")
+
+ @pytest.mark.incompatible_with_mypyc
+ def test_find_project_root(self) -> None:
+ with TemporaryDirectory() as workspace:
+ root = Path(workspace)
+ test_dir = root / "test"
+ test_dir.mkdir()
+
+ src_dir = root / "src"
+ src_dir.mkdir()
+
+ root_pyproject = root / "pyproject.toml"
+ root_pyproject.touch()
+ src_pyproject = src_dir / "pyproject.toml"
+ src_pyproject.touch()
+ src_python = src_dir / "foo.py"
+ src_python.touch()
+
+ self.assertEqual(
+ black.find_project_root((src_dir, test_dir)),
+ (root.resolve(), "pyproject.toml"),
+ )
+ self.assertEqual(
+ black.find_project_root((src_dir,)),
+ (src_dir.resolve(), "pyproject.toml"),
+ )
+ self.assertEqual(
+ black.find_project_root((src_python,)),
+ (src_dir.resolve(), "pyproject.toml"),
+ )
+
+ with change_directory(test_dir):
+ self.assertEqual(
+ black.find_project_root(("-",), stdin_filename="../src/a.py"),
+ (src_dir.resolve(), "pyproject.toml"),
+ )
+
+ @patch(
+ "black.files.find_user_pyproject_toml",
+ )
+ def test_find_pyproject_toml(self, find_user_pyproject_toml: MagicMock) -> None:
+ find_user_pyproject_toml.side_effect = RuntimeError()
+
+ with redirect_stderr(io.StringIO()) as stderr:
+ result = black.files.find_pyproject_toml(
+ path_search_start=(str(Path.cwd().root),)
+ )
+
+ assert result is None
+ err = stderr.getvalue()
+ assert "Ignoring user configuration" in err
+
+ @patch(
+ "black.files.find_user_pyproject_toml",
+ black.files.find_user_pyproject_toml.__wrapped__,
+ )
+ def test_find_user_pyproject_toml_linux(self) -> None:
+ if system() == "Windows":
+ return
+
+ # Test if XDG_CONFIG_HOME is checked
+ with TemporaryDirectory() as workspace:
+ tmp_user_config = Path(workspace) / "black"
+ with patch.dict("os.environ", {"XDG_CONFIG_HOME": workspace}):
+ self.assertEqual(
+ black.files.find_user_pyproject_toml(), tmp_user_config.resolve()
+ )
+
+ # Test fallback for XDG_CONFIG_HOME
+ with patch.dict("os.environ"):
+ os.environ.pop("XDG_CONFIG_HOME", None)
+ fallback_user_config = Path("~/.config").expanduser() / "black"
+ self.assertEqual(
+ black.files.find_user_pyproject_toml(), fallback_user_config.resolve()
+ )
+
+ def test_find_user_pyproject_toml_windows(self) -> None:
+ if system() != "Windows":
+ return
+
+ user_config_path = Path.home() / ".black"
+ self.assertEqual(
+ black.files.find_user_pyproject_toml(), user_config_path.resolve()
+ )
+
+ def test_bpo_33660_workaround(self) -> None:
+ if system() == "Windows":
+ return
+
+ # https://bugs.python.org/issue33660
+ root = Path("/")
+ with change_directory(root):
+ path = Path("workspace") / "project"
+ report = black.Report(verbose=True)
+ normalized_path = black.normalize_path_maybe_ignore(path, root, report)
+ self.assertEqual(normalized_path, "workspace/project")
+
+ def test_normalize_path_ignore_windows_junctions_outside_of_root(self) -> None:
+ if system() != "Windows":
+ return
+
+ with TemporaryDirectory() as workspace:
+ root = Path(workspace)
+ junction_dir = root / "junction"
+ junction_target_outside_of_root = root / ".."
+ os.system(f"mklink /J {junction_dir} {junction_target_outside_of_root}")
+
+ report = black.Report(verbose=True)
+ normalized_path = black.normalize_path_maybe_ignore(
+ junction_dir, root, report
+ )
+ # Manually delete for Python < 3.8
+ os.system(f"rmdir {junction_dir}")
+
+ self.assertEqual(normalized_path, None)
+
+ def test_newline_comment_interaction(self) -> None:
+ source = "class A:\\\r\n# type: ignore\n pass\n"
+ output = black.format_str(source, mode=DEFAULT_MODE)
+ black.assert_stable(source, output, mode=DEFAULT_MODE)
+
+ def test_bpo_2142_workaround(self) -> None:
+ # https://bugs.python.org/issue2142
+
+ source, _ = read_data("miscellaneous", "missing_final_newline")
+ # read_data adds a trailing newline
+ source = source.rstrip()
+ expected, _ = read_data("miscellaneous", "missing_final_newline.diff")
+ tmp_file = Path(black.dump_to_file(source, ensure_final_newline=False))
+ diff_header = re.compile(
+ rf"{re.escape(str(tmp_file))}\t\d\d\d\d-\d\d-\d\d "
+ r"\d\d:\d\d:\d\d\.\d\d\d\d\d\d\+\d\d:\d\d"
+ )
+ try:
+ result = BlackRunner().invoke(black.main, ["--diff", str(tmp_file)])
+ self.assertEqual(result.exit_code, 0)
+ finally:
+ os.unlink(tmp_file)
+ actual = result.output
+ actual = diff_header.sub(DETERMINISTIC_HEADER, actual)
+ self.assertEqual(actual, expected)
+
+ @staticmethod
+ def compare_results(
+ result: click.testing.Result, expected_value: str, expected_exit_code: int
+ ) -> None:
+ """Helper method to test the value and exit code of a click Result."""
+ assert (
+ result.output == expected_value
+ ), "The output did not match the expected value."
+ assert result.exit_code == expected_exit_code, "The exit code is incorrect."
+
+ def test_code_option(self) -> None:
+ """Test the code option with no changes."""
+ code = 'print("Hello world")\n'
+ args = ["--code", code]
+ result = CliRunner().invoke(black.main, args)
+
+ self.compare_results(result, code, 0)
+
+ def test_code_option_changed(self) -> None:
+ """Test the code option when changes are required."""
+ code = "print('hello world')"
+ formatted = black.format_str(code, mode=DEFAULT_MODE)
+
+ args = ["--code", code]
+ result = CliRunner().invoke(black.main, args)
+
+ self.compare_results(result, formatted, 0)
+
+ def test_code_option_check(self) -> None:
+ """Test the code option when check is passed."""
+ args = ["--check", "--code", 'print("Hello world")\n']
+ result = CliRunner().invoke(black.main, args)
+ self.compare_results(result, "", 0)
+
+ def test_code_option_check_changed(self) -> None:
+ """Test the code option when changes are required, and check is passed."""
+ args = ["--check", "--code", "print('hello world')"]
+ result = CliRunner().invoke(black.main, args)
+ self.compare_results(result, "", 1)
+
+ def test_code_option_diff(self) -> None:
+ """Test the code option when diff is passed."""
+ code = "print('hello world')"
+ formatted = black.format_str(code, mode=DEFAULT_MODE)
+ result_diff = diff(code, formatted, "STDIN", "STDOUT")
+
+ args = ["--diff", "--code", code]
+ result = CliRunner().invoke(black.main, args)
+
+ # Remove time from diff
+ output = DIFF_TIME.sub("", result.output)
+
+ assert output == result_diff, "The output did not match the expected value."
+ assert result.exit_code == 0, "The exit code is incorrect."
+
+ def test_code_option_color_diff(self) -> None:
+ """Test the code option when color and diff are passed."""
+ code = "print('hello world')"
+ formatted = black.format_str(code, mode=DEFAULT_MODE)
+
+ result_diff = diff(code, formatted, "STDIN", "STDOUT")
+ result_diff = color_diff(result_diff)
+
+ args = ["--diff", "--color", "--code", code]
+ result = CliRunner().invoke(black.main, args)
+
+ # Remove time from diff
+ output = DIFF_TIME.sub("", result.output)
+
+ assert output == result_diff, "The output did not match the expected value."
+ assert result.exit_code == 0, "The exit code is incorrect."
+
+ @pytest.mark.incompatible_with_mypyc
+ def test_code_option_safe(self) -> None:
+ """Test that the code option throws an error when the sanity checks fail."""
+ # Patch black.assert_equivalent to ensure the sanity checks fail
+ with patch.object(black, "assert_equivalent", side_effect=AssertionError):
+ code = 'print("Hello world")'
+ error_msg = f"{code}\nerror: cannot format <string>: \n"
+
+ args = ["--safe", "--code", code]
+ result = CliRunner().invoke(black.main, args)
+
+ self.compare_results(result, error_msg, 123)
+
+ def test_code_option_fast(self) -> None:
+ """Test that the code option ignores errors when the sanity checks fail."""
+ # Patch black.assert_equivalent to ensure the sanity checks fail
+ with patch.object(black, "assert_equivalent", side_effect=AssertionError):
+ code = 'print("Hello world")'
+ formatted = black.format_str(code, mode=DEFAULT_MODE)
+
+ args = ["--fast", "--code", code]
+ result = CliRunner().invoke(black.main, args)
+
+ self.compare_results(result, formatted, 0)
+
+ @pytest.mark.incompatible_with_mypyc
+ def test_code_option_config(self) -> None:
+ """
+ Test that the code option finds the pyproject.toml in the current directory.
+ """
+ with patch.object(black, "parse_pyproject_toml", return_value={}) as parse:
+ args = ["--code", "print"]
+ # This is the only directory known to contain a pyproject.toml
+ with change_directory(PROJECT_ROOT):
+ CliRunner().invoke(black.main, args)
+ pyproject_path = Path(Path.cwd(), "pyproject.toml").resolve()
+
+ assert (
+ len(parse.mock_calls) >= 1
+ ), "Expected config parse to be called with the current directory."
+
+ _, call_args, _ = parse.mock_calls[0]
+ assert (
+ call_args[0].lower() == str(pyproject_path).lower()
+ ), "Incorrect config loaded."
+
+ @pytest.mark.incompatible_with_mypyc
+ def test_code_option_parent_config(self) -> None:
+ """
+ Test that the code option finds the pyproject.toml in the parent directory.
+ """
+ with patch.object(black, "parse_pyproject_toml", return_value={}) as parse:
+ with change_directory(THIS_DIR):
+ args = ["--code", "print"]
+ CliRunner().invoke(black.main, args)
+
+ pyproject_path = Path(Path().cwd().parent, "pyproject.toml").resolve()
+ assert (
+ len(parse.mock_calls) >= 1
+ ), "Expected config parse to be called with the current directory."
+
+ _, call_args, _ = parse.mock_calls[0]
+ assert (
+ call_args[0].lower() == str(pyproject_path).lower()
+ ), "Incorrect config loaded."
+
+ def test_for_handled_unexpected_eof_error(self) -> None:
+ """
+ Test that an unexpected EOF SyntaxError is nicely presented.
+ """
+ with pytest.raises(black.parsing.InvalidInput) as exc_info:
+ black.lib2to3_parse("print(", {})
+
+ exc_info.match("Cannot parse: 2:0: EOF in multi-line statement")
+
+ def test_equivalency_ast_parse_failure_includes_error(self) -> None:
+ with pytest.raises(AssertionError) as err:
+ black.assert_equivalent("a«»a = 1", "a«»a = 1")
+
+ err.match("--safe")
+ # Unfortunately the SyntaxError message has changed in newer versions so we
+ # can't match it directly.
+ err.match("invalid character")
+ err.match(r"\(<unknown>, line 1\)")
+
+
+class TestCaching:
+ def test_get_cache_dir(
+ self,
+ tmp_path: Path,
+ monkeypatch: pytest.MonkeyPatch,
+ ) -> None:
+ # Create multiple cache directories
+ workspace1 = tmp_path / "ws1"
+ workspace1.mkdir()
+ workspace2 = tmp_path / "ws2"
+ workspace2.mkdir()
+
+ # Force user_cache_dir to use the temporary directory for easier assertions
+ patch_user_cache_dir = patch(
+ target="black.cache.user_cache_dir",
+ autospec=True,
+ return_value=str(workspace1),
+ )
+
+ # If BLACK_CACHE_DIR is not set, use user_cache_dir
+ monkeypatch.delenv("BLACK_CACHE_DIR", raising=False)
+ with patch_user_cache_dir:
+ assert get_cache_dir() == workspace1
+
+ # If it is set, use the path provided in the env var.
+ monkeypatch.setenv("BLACK_CACHE_DIR", str(workspace2))
+ assert get_cache_dir() == workspace2
+
+ def test_cache_broken_file(self) -> None:
+ mode = DEFAULT_MODE
+ with cache_dir() as workspace:
+ cache_file = get_cache_file(mode)
+ cache_file.write_text("this is not a pickle", encoding="utf-8")
+ assert black.Cache.read(mode).file_data == {}
+ src = (workspace / "test.py").resolve()
+ src.write_text("print('hello')", encoding="utf-8")
+ invokeBlack([str(src)])
+ cache = black.Cache.read(mode)
+ assert not cache.is_changed(src)
+
+ def test_cache_single_file_already_cached(self) -> None:
+ mode = DEFAULT_MODE
+ with cache_dir() as workspace:
+ src = (workspace / "test.py").resolve()
+ src.write_text("print('hello')", encoding="utf-8")
+ cache = black.Cache.read(mode)
+ cache.write([src])
+ invokeBlack([str(src)])
+ assert src.read_text(encoding="utf-8") == "print('hello')"
+
+ @event_loop()
+ def test_cache_multiple_files(self) -> None:
+ mode = DEFAULT_MODE
+ with cache_dir() as workspace, patch(
+ "concurrent.futures.ProcessPoolExecutor", new=ThreadPoolExecutor
+ ):
+ one = (workspace / "one.py").resolve()
+ one.write_text("print('hello')", encoding="utf-8")
+ two = (workspace / "two.py").resolve()
+ two.write_text("print('hello')", encoding="utf-8")
+ cache = black.Cache.read(mode)
+ cache.write([one])
+ invokeBlack([str(workspace)])
+ assert one.read_text(encoding="utf-8") == "print('hello')"
+ assert two.read_text(encoding="utf-8") == 'print("hello")\n'
+ cache = black.Cache.read(mode)
+ assert not cache.is_changed(one)
+ assert not cache.is_changed(two)
+
+ @pytest.mark.incompatible_with_mypyc
+ @pytest.mark.parametrize("color", [False, True], ids=["no-color", "with-color"])
+ def test_no_cache_when_writeback_diff(self, color: bool) -> None:
+ mode = DEFAULT_MODE
+ with cache_dir() as workspace:
+ src = (workspace / "test.py").resolve()
+ src.write_text("print('hello')", encoding="utf-8")
+ with patch.object(black.Cache, "read") as read_cache, patch.object(
+ black.Cache, "write"
+ ) as write_cache:
+ cmd = [str(src), "--diff"]
+ if color:
+ cmd.append("--color")
+ invokeBlack(cmd)
+ cache_file = get_cache_file(mode)
+ assert cache_file.exists() is False
+ read_cache.assert_called_once()
+ write_cache.assert_not_called()
+
+ @pytest.mark.parametrize("color", [False, True], ids=["no-color", "with-color"])
+ @event_loop()
+ def test_output_locking_when_writeback_diff(self, color: bool) -> None:
+ with cache_dir() as workspace:
+ for tag in range(0, 4):
+ src = (workspace / f"test{tag}.py").resolve()
+ src.write_text("print('hello')", encoding="utf-8")
+ with patch(
+ "black.concurrency.Manager", wraps=multiprocessing.Manager
+ ) as mgr:
+ cmd = ["--diff", str(workspace)]
+ if color:
+ cmd.append("--color")
+ invokeBlack(cmd, exit_code=0)
+ # this isn't quite doing what we want, but if it _isn't_
+ # called then we cannot be using the lock it provides
+ mgr.assert_called()
+
+ def test_no_cache_when_stdin(self) -> None:
+ mode = DEFAULT_MODE
+ with cache_dir():
+ result = CliRunner().invoke(
+ black.main, ["-"], input=BytesIO(b"print('hello')")
+ )
+ assert not result.exit_code
+ cache_file = get_cache_file(mode)
+ assert not cache_file.exists()
+
+ def test_read_cache_no_cachefile(self) -> None:
+ mode = DEFAULT_MODE
+ with cache_dir():
+ assert black.Cache.read(mode).file_data == {}
+
+ def test_write_cache_read_cache(self) -> None:
+ mode = DEFAULT_MODE
+ with cache_dir() as workspace:
+ src = (workspace / "test.py").resolve()
+ src.touch()
+ write_cache = black.Cache.read(mode)
+ write_cache.write([src])
+ read_cache = black.Cache.read(mode)
+ assert not read_cache.is_changed(src)
+
+ @pytest.mark.incompatible_with_mypyc
+ 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 = black.Cache.read(DEFAULT_MODE)
+
+ orig_func = black.Cache.get_file_data
+
+ def wrapped_func(path: Path) -> FileData:
+ if path == cached:
+ return orig_func(path)
+ if path == cached_but_changed:
+ return FileData(0.0, 0, "")
+ raise AssertionError
+
+ with patch.object(black.Cache, "get_file_data", side_effect=wrapped_func):
+ cache.write([cached, cached_but_changed])
+ todo, done = cache.filtered_cached({uncached, cached, cached_but_changed})
+ assert todo == {uncached, cached_but_changed}
+ assert done == {cached}
+
+ def test_filter_cached_hash(self) -> None:
+ with TemporaryDirectory() as workspace:
+ path = Path(workspace)
+ src = (path / "test.py").resolve()
+ src.write_text("print('hello')", encoding="utf-8")
+ st = src.stat()
+ cache = black.Cache.read(DEFAULT_MODE)
+ cache.write([src])
+ cached_file_data = cache.file_data[str(src)]
+
+ todo, done = cache.filtered_cached([src])
+ assert todo == set()
+ assert done == {src}
+ assert cached_file_data.st_mtime == st.st_mtime
+
+ # Modify st_mtime
+ cached_file_data = cache.file_data[str(src)] = FileData(
+ cached_file_data.st_mtime - 1,
+ cached_file_data.st_size,
+ cached_file_data.hash,
+ )
+ todo, done = cache.filtered_cached([src])
+ assert todo == set()
+ assert done == {src}
+ assert cached_file_data.st_mtime < st.st_mtime
+ assert cached_file_data.st_size == st.st_size
+ assert cached_file_data.hash == black.Cache.hash_digest(src)
+
+ # Modify contents
+ src.write_text("print('hello world')", encoding="utf-8")
+ new_st = src.stat()
+ todo, done = cache.filtered_cached([src])
+ assert todo == {src}
+ assert done == set()
+ assert cached_file_data.st_mtime < new_st.st_mtime
+ assert cached_file_data.st_size != new_st.st_size
+ assert cached_file_data.hash != black.Cache.hash_digest(src)
+
+ def test_write_cache_creates_directory_if_needed(self) -> None:
+ mode = DEFAULT_MODE
+ with cache_dir(exists=False) as workspace:
+ assert not workspace.exists()
+ cache = black.Cache.read(mode)
+ cache.write([])
+ assert workspace.exists()
+
+ @event_loop()
+ def test_failed_formatting_does_not_get_cached(self) -> None:
+ mode = DEFAULT_MODE
+ with cache_dir() as workspace, patch(
+ "concurrent.futures.ProcessPoolExecutor", new=ThreadPoolExecutor
+ ):
+ failing = (workspace / "failing.py").resolve()
+ failing.write_text("not actually python", encoding="utf-8")
+ clean = (workspace / "clean.py").resolve()
+ clean.write_text('print("hello")\n', encoding="utf-8")
+ invokeBlack([str(workspace)], exit_code=123)
+ cache = black.Cache.read(mode)
+ assert cache.is_changed(failing)
+ assert not cache.is_changed(clean)
+
+ def test_write_cache_write_fail(self) -> None:
+ mode = DEFAULT_MODE
+ with cache_dir():
+ cache = black.Cache.read(mode)
+ with patch.object(Path, "open") as mock:
+ mock.side_effect = OSError
+ cache.write([])
+
+ 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()
+ cache = black.Cache.read(mode)
+ cache.write([path])
+ one = black.Cache.read(mode)
+ assert not one.is_changed(path)
+ two = black.Cache.read(short_mode)
+ assert two.is_changed(path)
+
+
+def assert_collected_sources(
+ src: Sequence[Union[str, Path]],
+ expected: Sequence[Union[str, Path]],
+ *,
+ root: Optional[Path] = None,
+ exclude: Optional[str] = None,
+ include: Optional[str] = None,
+ extend_exclude: Optional[str] = None,
+ force_exclude: Optional[str] = None,
+ stdin_filename: Optional[str] = None,
+) -> None:
+ gs_src = tuple(str(Path(s)) for s in src)
+ gs_expected = [Path(s) for s in expected]
+ gs_exclude = None if exclude is None else compile_pattern(exclude)
+ gs_include = DEFAULT_INCLUDE if include is None else compile_pattern(include)
+ gs_extend_exclude = (
+ None if extend_exclude is None else compile_pattern(extend_exclude)
+ )
+ gs_force_exclude = None if force_exclude is None else compile_pattern(force_exclude)
+ collected = black.get_sources(
+ root=root or THIS_DIR,
+ src=gs_src,
+ quiet=False,
+ verbose=False,
+ include=gs_include,
+ exclude=gs_exclude,
+ extend_exclude=gs_extend_exclude,
+ force_exclude=gs_force_exclude,
+ report=black.Report(),
+ stdin_filename=stdin_filename,
+ )
+ assert sorted(collected) == sorted(gs_expected)
+
+
+class TestFileCollection:
+ def test_include_exclude(self) -> None:
+ path = THIS_DIR / "data" / "include_exclude_tests"
+ src = [path]
+ expected = [
+ Path(path / "b/dont_exclude/a.py"),
+ Path(path / "b/dont_exclude/a.pyi"),
+ ]
+ assert_collected_sources(
+ src,
+ expected,
+ include=r"\.pyi?$",
+ exclude=r"/exclude/|/\.definitely_exclude/",
+ )
+
+ def test_gitignore_used_as_default(self) -> None:
+ base = Path(DATA_DIR / "include_exclude_tests")
+ expected = [
+ base / "b/.definitely_exclude/a.py",
+ base / "b/.definitely_exclude/a.pyi",
+ ]
+ src = [base / "b/"]
+ assert_collected_sources(src, expected, root=base, extend_exclude=r"/exclude/")
+
+ def test_gitignore_used_on_multiple_sources(self) -> None:
+ root = Path(DATA_DIR / "gitignore_used_on_multiple_sources")
+ expected = [
+ root / "dir1" / "b.py",
+ root / "dir2" / "b.py",
+ ]
+ src = [root / "dir1", root / "dir2"]
+ assert_collected_sources(src, expected, root=root)
+
+ @patch("black.find_project_root", lambda *args: (THIS_DIR.resolve(), None))
+ def test_exclude_for_issue_1572(self) -> None:
+ # Exclude shouldn't touch files that were explicitly given to Black through the
+ # CLI. Exclude is supposed to only apply to the recursive discovery of files.
+ # https://github.com/psf/black/issues/1572
+ path = DATA_DIR / "include_exclude_tests"
+ src = [path / "b/exclude/a.py"]
+ expected = [path / "b/exclude/a.py"]
+ assert_collected_sources(src, expected, include="", exclude=r"/exclude/|a\.py")
+
+ def test_gitignore_exclude(self) -> None:
+ path = THIS_DIR / "data" / "include_exclude_tests"
+ include = re.compile(r"\.pyi?$")
+ exclude = re.compile(r"")
+ 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,
+ None,
+ report,
+ {path: gitignore},
+ verbose=False,
+ quiet=False,
+ )
+ )
+ assert sorted(expected) == sorted(sources)
+
+ def test_nested_gitignore(self) -> None:
+ path = Path(THIS_DIR / "data" / "nested_gitignore_tests")
+ include = re.compile(r"\.pyi?$")
+ exclude = re.compile(r"")
+ root_gitignore = black.files.get_gitignore(path)
+ report = black.Report()
+ expected: List[Path] = [
+ Path(path / "x.py"),
+ Path(path / "root/b.py"),
+ Path(path / "root/c.py"),
+ Path(path / "root/child/c.py"),
+ ]
+ this_abs = THIS_DIR.resolve()
+ sources = list(
+ black.gen_python_files(
+ path.iterdir(),
+ this_abs,
+ include,
+ exclude,
+ None,
+ None,
+ report,
+ {path: root_gitignore},
+ verbose=False,
+ quiet=False,
+ )
+ )
+ assert sorted(expected) == sorted(sources)
+
+ def test_nested_gitignore_directly_in_source_directory(self) -> None:
+ # https://github.com/psf/black/issues/2598
+ path = Path(DATA_DIR / "nested_gitignore_tests")
+ src = Path(path / "root" / "child")
+ expected = [src / "a.py", src / "c.py"]
+ assert_collected_sources([src], expected)
+
+ def test_invalid_gitignore(self) -> None:
+ path = THIS_DIR / "data" / "invalid_gitignore_tests"
+ empty_config = path / "pyproject.toml"
+ result = BlackRunner().invoke(
+ black.main, ["--verbose", "--config", str(empty_config), str(path)]
+ )
+ assert result.exit_code == 1
+ assert result.stderr_bytes is not None
+
+ gitignore = path / ".gitignore"
+ assert f"Could not parse {gitignore}" in result.stderr_bytes.decode()
+
+ def test_invalid_nested_gitignore(self) -> None:
+ path = THIS_DIR / "data" / "invalid_nested_gitignore_tests"
+ empty_config = path / "pyproject.toml"
+ result = BlackRunner().invoke(
+ black.main, ["--verbose", "--config", str(empty_config), str(path)]
+ )
+ assert result.exit_code == 1
+ assert result.stderr_bytes is not None
+
+ gitignore = path / "a" / ".gitignore"
+ assert f"Could not parse {gitignore}" in result.stderr_bytes.decode()
+
+ def test_gitignore_that_ignores_subfolders(self) -> None:
+ # If gitignore with */* is in root
+ root = Path(DATA_DIR / "ignore_subfolders_gitignore_tests" / "subdir")
+ expected = [root / "b.py"]
+ assert_collected_sources([root], expected, root=root)
+
+ # If .gitignore with */* is nested
+ root = Path(DATA_DIR / "ignore_subfolders_gitignore_tests")
+ expected = [
+ root / "a.py",
+ root / "subdir" / "b.py",
+ ]
+ assert_collected_sources([root], expected, root=root)
+
+ # If command is executed from outer dir
+ root = Path(DATA_DIR / "ignore_subfolders_gitignore_tests")
+ target = root / "subdir"
+ expected = [target / "b.py"]
+ assert_collected_sources([target], expected, root=root)
+
+ def test_empty_include(self) -> None:
+ path = DATA_DIR / "include_exclude_tests"
+ src = [path]
+ expected = [
+ Path(path / "b/exclude/a.pie"),
+ Path(path / "b/exclude/a.py"),
+ 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"),
+ Path(path / ".gitignore"),
+ Path(path / "pyproject.toml"),
+ ]
+ # Setting exclude explicitly to an empty string to block .gitignore usage.
+ assert_collected_sources(src, expected, include="", exclude="")
+
+ def test_extend_exclude(self) -> None:
+ path = DATA_DIR / "include_exclude_tests"
+ src = [path]
+ expected = [
+ Path(path / "b/exclude/a.py"),
+ Path(path / "b/dont_exclude/a.py"),
+ ]
+ assert_collected_sources(
+ src, expected, exclude=r"\.pyi$", extend_exclude=r"\.definitely_exclude"
+ )
+
+ @pytest.mark.incompatible_with_mypyc
+ def test_symlinks(self) -> None:
+ path = MagicMock()
+ root = THIS_DIR.resolve()
+ include = re.compile(black.DEFAULT_INCLUDES)
+ exclude = re.compile(black.DEFAULT_EXCLUDES)
+ report = black.Report()
+ gitignore = PathSpec.from_lines("gitwildmatch", [])
+
+ regular = MagicMock()
+ outside_root_symlink = MagicMock()
+ ignored_symlink = MagicMock()
+
+ path.iterdir.return_value = [regular, outside_root_symlink, ignored_symlink]
+
+ regular.absolute.return_value = root / "regular.py"
+ regular.resolve.return_value = root / "regular.py"
+ regular.is_dir.return_value = False
+
+ outside_root_symlink.absolute.return_value = root / "symlink.py"
+ outside_root_symlink.resolve.return_value = Path("/nowhere")
+
+ ignored_symlink.absolute.return_value = root / ".mypy_cache" / "symlink.py"
+
+ files = list(
+ black.gen_python_files(
+ path.iterdir(),
+ root,
+ include,
+ exclude,
+ None,
+ None,
+ report,
+ {path: gitignore},
+ verbose=False,
+ quiet=False,
+ )
+ )
+ assert files == [regular]
+
+ path.iterdir.assert_called_once()
+ outside_root_symlink.resolve.assert_called_once()
+ ignored_symlink.resolve.assert_not_called()
+
+ @patch("black.find_project_root", lambda *args: (THIS_DIR.resolve(), None))
+ def test_get_sources_with_stdin(self) -> None:
+ src = ["-"]
+ expected = ["-"]
+ assert_collected_sources(src, expected, include="", exclude=r"/exclude/|a\.py")
+
+ @patch("black.find_project_root", lambda *args: (THIS_DIR.resolve(), None))
+ def test_get_sources_with_stdin_filename(self) -> None:
+ src = ["-"]
+ stdin_filename = str(THIS_DIR / "data/collections.py")
+ expected = [f"__BLACK_STDIN_FILENAME__{stdin_filename}"]
+ assert_collected_sources(
+ src,
+ expected,
+ exclude=r"/exclude/a\.py",
+ stdin_filename=stdin_filename,
+ )
+
+ @patch("black.find_project_root", lambda *args: (THIS_DIR.resolve(), None))
+ def test_get_sources_with_stdin_filename_and_exclude(self) -> None:
+ # Exclude shouldn't exclude stdin_filename since it is mimicking the
+ # file being passed directly. This is the same as
+ # test_exclude_for_issue_1572
+ path = DATA_DIR / "include_exclude_tests"
+ src = ["-"]
+ stdin_filename = str(path / "b/exclude/a.py")
+ expected = [f"__BLACK_STDIN_FILENAME__{stdin_filename}"]
+ assert_collected_sources(
+ src,
+ expected,
+ exclude=r"/exclude/|a\.py",
+ stdin_filename=stdin_filename,
+ )
+
+ @patch("black.find_project_root", lambda *args: (THIS_DIR.resolve(), None))
+ def test_get_sources_with_stdin_filename_and_extend_exclude(self) -> None:
+ # Extend exclude shouldn't exclude stdin_filename since it is mimicking the
+ # file being passed directly. This is the same as
+ # test_exclude_for_issue_1572
+ src = ["-"]
+ path = THIS_DIR / "data" / "include_exclude_tests"
+ stdin_filename = str(path / "b/exclude/a.py")
+ expected = [f"__BLACK_STDIN_FILENAME__{stdin_filename}"]
+ assert_collected_sources(
+ src,
+ expected,
+ extend_exclude=r"/exclude/|a\.py",
+ stdin_filename=stdin_filename,
+ )
+
+ @patch("black.find_project_root", lambda *args: (THIS_DIR.resolve(), None))
+ def test_get_sources_with_stdin_filename_and_force_exclude(self) -> None:
+ # Force exclude should exclude the file when passing it through
+ # stdin_filename
+ path = THIS_DIR / "data" / "include_exclude_tests"
+ stdin_filename = str(path / "b/exclude/a.py")
+ assert_collected_sources(
+ src=["-"],
+ expected=[],
+ force_exclude=r"/exclude/|a\.py",
+ stdin_filename=stdin_filename,
+ )
+
+
+try:
+ with open(black.__file__, "r", encoding="utf-8") as _bf:
+ black_source_lines = _bf.readlines()
+except UnicodeDecodeError:
+ if not black.COMPILED:
+ raise
+
+
+def tracefunc(
+ frame: types.FrameType, event: str, arg: Any
+) -> Callable[[types.FrameType, str, Any], Any]:
+ """Show function calls `from black/__init__.py` as they happen.
projects / etc / vim.git / blobdiff