+ 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_cache_broken_file(self) -> None:
+ mode = DEFAULT_MODE
+ with cache_dir() as workspace:
+ cache_file = get_cache_file(mode)
+ cache_file.write_text("this is not a pickle")
+ assert black.read_cache(mode) == {}
+ src = (workspace / "test.py").resolve()
+ src.write_text("print('hello')")
+ invokeBlack([str(src)])
+ cache = black.read_cache(mode)
+ assert str(src) in cache
+
+ def test_cache_single_file_already_cached(self) -> None:
+ mode = DEFAULT_MODE
+ with cache_dir() as workspace:
+ src = (workspace / "test.py").resolve()
+ src.write_text("print('hello')")
+ black.write_cache({}, [src], mode)
+ invokeBlack([str(src)])
+ assert src.read_text() == "print('hello')"
+
+ @event_loop()
+ def test_cache_multiple_files(self) -> None:
+ mode = DEFAULT_MODE
+ with cache_dir() as workspace, patch(
+ "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)
+ invokeBlack([str(workspace)])
+ with one.open("r") as fobj:
+ assert fobj.read() == "print('hello')"
+ with two.open("r") as fobj:
+ assert fobj.read() == 'print("hello")\n'
+ cache = black.read_cache(mode)
+ assert str(one) in cache
+ assert str(two) in cache
+
+ @pytest.mark.parametrize("color", [False, True], ids=["no-color", "with-color"])
+ def test_no_cache_when_writeback_diff(self, color: bool) -> None:
+ mode = DEFAULT_MODE
+ with cache_dir() as workspace:
+ src = (workspace / "test.py").resolve()
+ with src.open("w") as fobj:
+ fobj.write("print('hello')")
+ with patch("black.read_cache") as read_cache, patch(
+ "black.write_cache"
+ ) as write_cache:
+ cmd = [str(src), "--diff"]
+ if color:
+ cmd.append("--color")
+ invokeBlack(cmd)
+ cache_file = get_cache_file(mode)
+ assert cache_file.exists() is False
+ write_cache.assert_not_called()
+ read_cache.assert_not_called()
+
+ @pytest.mark.parametrize("color", [False, True], ids=["no-color", "with-color"])
+ @event_loop()
+ def test_output_locking_when_writeback_diff(self, color: bool) -> None:
+ with cache_dir() as workspace:
+ for tag in range(0, 4):
+ src = (workspace / f"test{tag}.py").resolve()
+ with src.open("w") as fobj:
+ fobj.write("print('hello')")
+ with patch("black.Manager", wraps=multiprocessing.Manager) as mgr:
+ cmd = ["--diff", str(workspace)]
+ if color:
+ cmd.append("--color")
+ invokeBlack(cmd, exit_code=0)
+ # this isn't quite doing what we want, but if it _isn't_
+ # called then we cannot be using the lock it provides
+ mgr.assert_called()
+
+ def test_no_cache_when_stdin(self) -> None:
+ mode = DEFAULT_MODE
+ with cache_dir():
+ result = CliRunner().invoke(
+ black.main, ["-"], input=BytesIO(b"print('hello')")
+ )
+ assert not result.exit_code
+ cache_file = get_cache_file(mode)
+ assert not cache_file.exists()
+
+ def test_read_cache_no_cachefile(self) -> None:
+ mode = DEFAULT_MODE
+ with cache_dir():
+ assert black.read_cache(mode) == {}
+
+ def test_write_cache_read_cache(self) -> None:
+ mode = DEFAULT_MODE
+ with cache_dir() as workspace:
+ src = (workspace / "test.py").resolve()
+ src.touch()
+ black.write_cache({}, [src], mode)
+ cache = black.read_cache(mode)
+ assert str(src) in cache
+ assert cache[str(src)] == black.get_cache_info(src)
+
+ def test_filter_cached(self) -> None:
+ with TemporaryDirectory() as workspace:
+ path = Path(workspace)
+ uncached = (path / "uncached").resolve()
+ cached = (path / "cached").resolve()
+ cached_but_changed = (path / "changed").resolve()
+ uncached.touch()
+ cached.touch()
+ cached_but_changed.touch()
+ cache = {
+ str(cached): black.get_cache_info(cached),
+ str(cached_but_changed): (0.0, 0),
+ }
+ todo, done = black.filter_cached(
+ cache, {uncached, cached, cached_but_changed}
+ )
+ assert todo == {uncached, cached_but_changed}
+ assert done == {cached}
+
+ def test_write_cache_creates_directory_if_needed(self) -> None:
+ mode = DEFAULT_MODE
+ with cache_dir(exists=False) as workspace:
+ assert not workspace.exists()
+ black.write_cache({}, [], mode)
+ assert workspace.exists()
+
+ @event_loop()
+ def test_failed_formatting_does_not_get_cached(self) -> None:
+ mode = DEFAULT_MODE
+ with cache_dir() as workspace, patch(
+ "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')
+ invokeBlack([str(workspace)], exit_code=123)
+ cache = black.read_cache(mode)
+ assert str(failing) not in cache
+ assert str(clean) in cache
+
+ def test_write_cache_write_fail(self) -> None:
+ mode = DEFAULT_MODE
+ with cache_dir(), patch.object(Path, "open") as mock:
+ mock.side_effect = OSError
+ black.write_cache({}, [], mode)
+
+ def test_read_cache_line_lengths(self) -> None:
+ mode = DEFAULT_MODE
+ short_mode = replace(DEFAULT_MODE, line_length=1)
+ with cache_dir() as workspace:
+ path = (workspace / "file.py").resolve()
+ path.touch()
+ black.write_cache({}, [path], mode)
+ one = black.read_cache(mode)
+ assert str(path) in one
+ two = black.read_cache(short_mode)
+ assert str(path) not in two
+
+
+def assert_collected_sources(
+ src: Sequence[Union[str, Path]],
+ expected: Sequence[Union[str, Path]],
+ *,
+ ctx: Optional[FakeContext] = None,
+ exclude: Optional[str] = None,
+ include: Optional[str] = None,
+ extend_exclude: Optional[str] = None,
+ force_exclude: Optional[str] = None,
+ stdin_filename: Optional[str] = None,
+) -> None:
+ gs_src = tuple(str(Path(s)) for s in src)
+ gs_expected = [Path(s) for s in expected]
+ gs_exclude = None if exclude is None else compile_pattern(exclude)
+ gs_include = DEFAULT_INCLUDE if include is None else compile_pattern(include)
+ gs_extend_exclude = (
+ None if extend_exclude is None else compile_pattern(extend_exclude)
+ )
+ gs_force_exclude = None if force_exclude is None else compile_pattern(force_exclude)
+ collected = black.get_sources(
+ ctx=ctx or FakeContext(),
+ src=gs_src,
+ quiet=False,
+ verbose=False,
+ include=gs_include,
+ exclude=gs_exclude,
+ extend_exclude=gs_extend_exclude,
+ force_exclude=gs_force_exclude,
+ report=black.Report(),
+ stdin_filename=stdin_filename,
+ )
+ assert sorted(collected) == sorted(gs_expected)
+
+
+class TestFileCollection:
+ def test_include_exclude(self) -> None:
+ path = THIS_DIR / "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/",
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