from contextlib import contextmanager
from dataclasses import replace
import inspect
+import io
from io import BytesIO
import os
from pathlib import Path
import pytest
import unittest
from unittest.mock import patch, MagicMock
+from parameterized import parameterized
import click
from click import unstyle
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
# Import other test classes
from tests.util import (
THIS_DIR,
+ change_directory,
read_data,
DETERMINISTIC_HEADER,
BlackBaseTestCase,
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]:
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,
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))
)
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 = (
- result.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:
None,
report,
gitignore,
+ verbose=False,
+ quiet=False,
)
)
self.assertEqual(sorted(expected), sorted(sources))
# __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",
# __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?$")
None,
report,
gitignore,
+ verbose=False,
+ quiet=False,
)
)
self.assertEqual(sorted(expected), sorted(sources))
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()
None,
report,
gitignore,
+ verbose=False,
+ quiet=False,
)
)
self.assertEqual(sorted(expected), sorted(sources))
None,
report,
gitignore,
+ verbose=False,
+ quiet=False,
)
)
self.assertEqual(sorted(expected), sorted(sources))
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"
None,
report,
gitignore,
+ verbose=False,
+ quiet=False,
)
)
except ValueError as ve:
None,
report,
gitignore,
+ verbose=False,
+ quiet=False,
)
)
path.iterdir.assert_called()
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"):
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}")
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"
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()
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