X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/f2ea461e9e9fa5c47bb61fd72d512c748928badc..7b153936587e17b9db992a2d8c8b6cfba3ef7209:/tests/test_black.py

diff --git a/tests/test_black.py b/tests/test_black.py
index 29a0731..398a528 100644
--- a/tests/test_black.py
+++ b/tests/test_black.py
@@ -6,7 +6,8 @@ from concurrent.futures import ThreadPoolExecutor
 from contextlib import contextmanager
 from dataclasses import replace
 import inspect
-from io import BytesIO, TextIOWrapper
+import io
+from io import BytesIO
 import os
 from pathlib import Path
 from platform import system
@@ -16,10 +17,8 @@ from tempfile import TemporaryDirectory
 import types
 from typing import (
     Any,
-    BinaryIO,
     Callable,
     Dict,
-    Generator,
     List,
     Iterator,
     TypeVar,
@@ -27,6 +26,7 @@ from typing import (
 import pytest
 import unittest
 from unittest.mock import patch, MagicMock
+from parameterized import parameterized
 
 import click
 from click import unstyle
@@ -36,6 +36,7 @@ import black
 from black import Feature, TargetVersion
 from black.cache import get_cache_file
 from black.debug import DebugVisitor
+from black.output import diff, color_diff
 from black.report import Report
 import black.files
 
@@ -44,6 +45,7 @@ from pathspec import PathSpec
 # Import other test classes
 from tests.util import (
     THIS_DIR,
+    change_directory,
     read_data,
     DETERMINISTIC_HEADER,
     BlackBaseTestCase,
@@ -52,7 +54,6 @@ from tests.util import (
     ff,
     dump_to_stderr,
 )
-from .test_primer import PrimerCLITests  # noqa: F401
 
 
 THIS_FILE = Path(__file__)
@@ -66,6 +67,9 @@ PY36_ARGS = [f"--target-version={version.name.lower()}" for version in PY36_VERS
 T = TypeVar("T")
 R = TypeVar("R")
 
+# Match the time output in a diff, but nothing else
+DIFF_TIME = re.compile(r"\t[\d-:+\. ]+")
+
 
 @contextmanager
 def cache_dir(exists: bool = True) -> Iterator[Path]:
@@ -104,28 +108,10 @@ class FakeParameter(click.Parameter):
 
 
 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"""
+    """Make sure STDOUT and STDERR are kept separate when testing Black via its CLI."""
 
     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
+        super().__init__(mix_stderr=False)
 
 
 class BlackTestCase(BlackBaseTestCase):
@@ -136,13 +122,15 @@ class BlackTestCase(BlackBaseTestCase):
         if ignore_config:
             args = ["--verbose", "--config", str(THIS_DIR / "empty.toml"), *args]
         result = runner.invoke(black.main, args)
+        assert result.stdout_bytes is not None
+        assert result.stderr_bytes is not None
         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"stdout: {result.stdout_bytes.decode()!r}\n"
+                f"stderr: {result.stderr_bytes.decode()!r}\n"
                 f"exception: {result.exception}"
             ),
         )
@@ -175,8 +163,9 @@ class BlackTestCase(BlackBaseTestCase):
         )
         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)
+        if source != result.output:
+            black.assert_equivalent(source, result.output)
+            black.assert_stable(source, result.output, DEFAULT_MODE)
 
     def test_piping_diff(self) -> None:
         diff_header = re.compile(
@@ -311,6 +300,14 @@ class BlackTestCase(BlackBaseTestCase):
         versions = black.detect_target_versions(root)
         self.assertIn(black.TargetVersion.PY38, versions)
 
+    @parameterized.expand([(3, 9), (3, 10)])
+    def test_pep_572_newer_syntax(self, major: int, minor: int) -> None:
+        source, expected = read_data(f"pep_572_py{major}{minor}")
+        actual = fs(source, mode=DEFAULT_MODE)
+        self.assertFormatEqual(expected, actual)
+        if sys.version_info >= (major, minor):
+            black.assert_equivalent(source, actual)
+
     def test_expression_ff(self) -> None:
         source, expected = read_data("expression")
         tmp_file = Path(black.dump_to_file(source))
@@ -464,37 +461,6 @@ class BlackTestCase(BlackBaseTestCase):
             )
             self.assertEqual(expected, actual, msg)
 
-    @pytest.mark.no_python2
-    def test_python2_should_fail_without_optional_install(self) -> None:
-        if sys.version_info < (3, 8):
-            self.skipTest(
-                "Python 3.6 and 3.7 will install typed-ast to work and as such will be"
-                " able to parse Python 2 syntax without explicitly specifying the"
-                " python2 extra"
-            )
-
-        source = "x = 1234l"
-        tmp_file = Path(black.dump_to_file(source))
-        try:
-            runner = BlackRunner()
-            result = runner.invoke(black.main, [str(tmp_file)])
-            self.assertEqual(result.exit_code, 123)
-        finally:
-            os.unlink(tmp_file)
-        actual = (
-            runner.stderr_bytes.decode()
-            .replace("\n", "")
-            .replace("\\n", "")
-            .replace("\\r", "")
-            .replace("\r", "")
-        )
-        msg = (
-            "The requested source code has invalid Python 3 syntax."
-            "If you are trying to format Python 2 files please reinstall Black"
-            " with the 'python2' extra: `python3 -m pip install black[python2]`."
-        )
-        self.assertIn(msg, actual)
-
     @pytest.mark.python2
     @patch("black.dump_to_file", dump_to_stderr)
     def test_python2_print_function(self) -> None:
@@ -1422,11 +1388,13 @@ class BlackTestCase(BlackBaseTestCase):
                 None,
                 report,
                 gitignore,
+                verbose=False,
+                quiet=False,
             )
         )
         self.assertEqual(sorted(expected), sorted(sources))
 
-    def test_gitingore_used_as_default(self) -> None:
+    def test_gitignore_used_as_default(self) -> None:
         path = Path(THIS_DIR / "data" / "include_exclude_tests")
         include = re.compile(r"\.pyi?$")
         extend_exclude = re.compile(r"/exclude/")
@@ -1528,7 +1496,7 @@ class BlackTestCase(BlackBaseTestCase):
 
     @patch("black.find_project_root", lambda *args: THIS_DIR.resolve())
     def test_get_sources_with_stdin_filename_and_exclude(self) -> None:
-        # Exclude shouldn't exclude stdin_filename since it is mimicing the
+        # 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 = THIS_DIR / "data" / "include_exclude_tests"
@@ -1671,6 +1639,30 @@ class BlackTestCase(BlackBaseTestCase):
             # __BLACK_STDIN_FILENAME__ should have been stripped
             report.done.assert_called_with(expected, black.Changed.YES)
 
+    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)
+
     def test_reformat_one_with_stdin_and_existing_path(self) -> None:
         with patch(
             "black.format_stdin_to_stdout",
@@ -1695,6 +1687,20 @@ class BlackTestCase(BlackBaseTestCase):
             # __BLACK_STDIN_FILENAME__ should have been stripped
             report.done.assert_called_with(expected, black.Changed.YES)
 
+    def test_reformat_one_with_stdin_empty(self) -> None:
+        output = io.StringIO()
+        with patch("io.TextIOWrapper", lambda *args, **kwargs: output):
+            try:
+                black.format_stdin_to_stdout(
+                    fast=True,
+                    content="",
+                    write_back=black.WriteBack.YES,
+                    mode=DEFAULT_MODE,
+                )
+            except io.UnsupportedOperation:
+                pass  # StringIO does not support detach
+            assert output.getvalue() == ""
+
     def test_gitignore_exclude(self) -> None:
         path = THIS_DIR / "data" / "include_exclude_tests"
         include = re.compile(r"\.pyi?$")
@@ -1719,10 +1725,65 @@ class BlackTestCase(BlackBaseTestCase):
                 None,
                 report,
                 gitignore,
+                verbose=False,
+                quiet=False,
             )
         )
         self.assertEqual(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,
+                root_gitignore,
+                verbose=False,
+                quiet=False,
+            )
+        )
+        self.assertEqual(sorted(expected), sorted(sources))
+
+    def test_invalid_gitignore(self) -> None:
+        path = THIS_DIR / "data" / "invalid_gitignore_tests"
+        empty_config = path / "pyproject.toml"
+        result = BlackRunner().invoke(
+            black.main, ["--verbose", "--config", str(empty_config), str(path)]
+        )
+        assert result.exit_code == 1
+        assert result.stderr_bytes is not None
+
+        gitignore = path / ".gitignore"
+        assert f"Could not parse {gitignore}" in result.stderr_bytes.decode()
+
+    def test_invalid_nested_gitignore(self) -> None:
+        path = THIS_DIR / "data" / "invalid_nested_gitignore_tests"
+        empty_config = path / "pyproject.toml"
+        result = BlackRunner().invoke(
+            black.main, ["--verbose", "--config", str(empty_config), str(path)]
+        )
+        assert result.exit_code == 1
+        assert result.stderr_bytes is not None
+
+        gitignore = path / "a" / ".gitignore"
+        assert f"Could not parse {gitignore}" in result.stderr_bytes.decode()
+
     def test_empty_include(self) -> None:
         path = THIS_DIR / "data" / "include_exclude_tests"
         report = black.Report()
@@ -1753,6 +1814,8 @@ class BlackTestCase(BlackBaseTestCase):
                 None,
                 report,
                 gitignore,
+                verbose=False,
+                quiet=False,
             )
         )
         self.assertEqual(sorted(expected), sorted(sources))
@@ -1777,6 +1840,8 @@ class BlackTestCase(BlackBaseTestCase):
                 None,
                 report,
                 gitignore,
+                verbose=False,
+                quiet=False,
             )
         )
         self.assertEqual(sorted(expected), sorted(sources))
@@ -1785,6 +1850,16 @@ class BlackTestCase(BlackBaseTestCase):
         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__], exit_code=0, ignore_config=True
+        )
+
+    def test_required_version_does_not_match_version(self) -> None:
+        self.invokeBlack(
+            ["--required-version", "20.99b"], exit_code=1, ignore_config=True
+        )
+
     def test_preserves_line_endings(self) -> None:
         with TemporaryDirectory() as workspace:
             test_file = Path(workspace) / "test.py"
@@ -1805,7 +1880,7 @@ class BlackTestCase(BlackBaseTestCase):
                 black.main, ["-", "--fast"], input=BytesIO(contents.encode("utf8"))
             )
             self.assertEqual(result.exit_code, 0)
-            output = runner.stdout_bytes
+            output = result.stdout_bytes
             self.assertIn(nl.encode("utf8"), output)
             if nl == "\n":
                 self.assertNotIn(b"\r\n", output)
@@ -1839,6 +1914,8 @@ class BlackTestCase(BlackBaseTestCase):
                     None,
                     report,
                     gitignore,
+                    verbose=False,
+                    quiet=False,
                 )
             )
         except ValueError as ve:
@@ -1860,6 +1937,8 @@ class BlackTestCase(BlackBaseTestCase):
                     None,
                     report,
                     gitignore,
+                    verbose=False,
+                    quiet=False,
                 )
             )
         path.iterdir.assert_called()
@@ -1871,7 +1950,7 @@ class BlackTestCase(BlackBaseTestCase):
 
     def test_shhh_click(self) -> None:
         try:
-            from click import _unicodefun  # type: ignore
+            from click import _unicodefun
         except ModuleNotFoundError:
             self.skipTest("Incompatible Click version")
         if not hasattr(_unicodefun, "_verify_python3_env"):
@@ -1880,14 +1959,14 @@ class BlackTestCase(BlackBaseTestCase):
         with patch("locale.getpreferredencoding") as gpe:
             gpe.return_value = "ASCII"
             with self.assertRaises(RuntimeError):
-                _unicodefun._verify_python3_env()
+                _unicodefun._verify_python3_env()  # type: ignore
         # 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()
+                _unicodefun._verify_python3_env()  # type: ignore
             except RuntimeError as re:
                 self.fail(f"`patch_click()` failed, exception still raised: {re}")
 
@@ -1904,7 +1983,7 @@ class BlackTestCase(BlackBaseTestCase):
             critical=fail,
             log=fail,
         ):
-            ff(THIS_FILE)
+            ff(THIS_DIR / "util.py")
 
     def test_invalid_config_return_code(self) -> None:
         tmp_file = Path(black.dump_to_file())
@@ -2002,17 +2081,12 @@ class BlackTestCase(BlackBaseTestCase):
             return
 
         # https://bugs.python.org/issue33660
-
-        old_cwd = Path.cwd()
-        try:
-            root = Path("/")
-            os.chdir(str(root))
+        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")
-        finally:
-            os.chdir(str(old_cwd))
 
     def test_newline_comment_interaction(self) -> None:
         source = "class A:\\\r\n# type: ignore\n pass\n"
@@ -2062,6 +2136,139 @@ class BlackTestCase(BlackBaseTestCase):
         actual = result.output
         self.assertFormatEqual(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."
+
+    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)
+
+    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"]
+            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."
+
+    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(Path("tests")):
+                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."
+
 
 with open(black.__file__, "r", encoding="utf-8") as _bf:
     black_source_lines = _bf.readlines()