from io import BytesIO, TextIOWrapper
import os
from pathlib import Path
+import re
import sys
from tempfile import TemporaryDirectory
-from typing import Any, List, Tuple, Iterator
+from typing import Any, BinaryIO, Generator, List, Tuple, Iterator
import unittest
-from unittest.mock import patch
-import re
+from unittest.mock import patch, MagicMock
from click import unstyle
from click.testing import CliRunner
import black
+
ll = 88
ff = partial(black.format_file_in_place, line_length=ll, fast=True)
fs = partial(black.format_str, line_length=ll)
return "\n" + "\n".join(output) + "\n"
-def read_data(name: str) -> Tuple[str, str]:
+def read_data(name: str, data: bool = True) -> Tuple[str, str]:
"""read_data('test_name') -> 'input', 'output'"""
if not name.endswith((".py", ".pyi", ".out", ".diff")):
name += ".py"
_input: List[str] = []
_output: List[str] = []
- with open(THIS_DIR / name, "r", encoding="utf8") as test:
+ base_dir = THIS_DIR / "data" if data else THIS_DIR
+ with open(base_dir / name, "r", encoding="utf8") as test:
lines = test.readlines()
result = _input
for line in lines:
loop.close()
+class BlackRunner(CliRunner):
+ """Modify CliRunner so that stderr is not merged with stdout.
+
+ This is a hack that can be removed once we depend on Click 7.x"""
+
+ def __init__(self, stderrbuf: BinaryIO) -> None:
+ self.stderrbuf = stderrbuf
+ 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:
+ sys.stderr = hold_stderr
+
+
class BlackTestCase(unittest.TestCase):
maxDiff = None
black.err(str(ve))
self.assertEqual(expected, actual)
+ @patch("black.dump_to_file", dump_to_stderr)
+ def test_empty(self) -> None:
+ source = expected = ""
+ actual = fs(source)
+ self.assertFormatEqual(expected, actual)
+ black.assert_equivalent(source, actual)
+ black.assert_stable(source, actual, line_length=ll)
+
+ def test_empty_ff(self) -> None:
+ expected = ""
+ tmp_file = Path(black.dump_to_file())
+ try:
+ self.assertFalse(ff(tmp_file, write_back=black.WriteBack.YES))
+ with open(tmp_file, encoding="utf8") as f:
+ actual = f.read()
+ finally:
+ os.unlink(tmp_file)
+ self.assertFormatEqual(expected, actual)
+
@patch("black.dump_to_file", dump_to_stderr)
def test_self(self) -> None:
- source, expected = read_data("test_black")
+ source, expected = read_data("test_black", data=False)
actual = fs(source)
self.assertFormatEqual(expected, actual)
black.assert_equivalent(source, actual)
@patch("black.dump_to_file", dump_to_stderr)
def test_black(self) -> None:
- source, expected = read_data("../black")
+ source, expected = read_data("../black", data=False)
actual = fs(source)
self.assertFormatEqual(expected, actual)
black.assert_equivalent(source, actual)
self.assertFalse(ff(THIS_DIR / ".." / "black.py"))
def test_piping(self) -> None:
- source, expected = read_data("../black")
- hold_stdin, hold_stdout = sys.stdin, sys.stdout
- try:
- sys.stdin = TextIOWrapper(BytesIO(source.encode("utf8")), encoding="utf8")
- sys.stdout = TextIOWrapper(BytesIO(), encoding="utf8")
- sys.stdin.buffer.name = "<stdin>" # type: ignore
- black.format_stdin_to_stdout(
- line_length=ll, fast=True, write_back=black.WriteBack.YES
- )
- sys.stdout.seek(0)
- actual = sys.stdout.read()
- finally:
- sys.stdin, sys.stdout = hold_stdin, hold_stdout
- self.assertFormatEqual(expected, actual)
- black.assert_equivalent(source, actual)
- black.assert_stable(source, actual, line_length=ll)
+ source, expected = read_data("../black", data=False)
+ stderrbuf = BytesIO()
+ result = BlackRunner(stderrbuf).invoke(
+ black.main,
+ ["-", "--fast", f"--line-length={ll}"],
+ input=BytesIO(source.encode("utf8")),
+ )
+ self.assertEqual(result.exit_code, 0)
+ self.assertFormatEqual(expected, result.output)
+ black.assert_equivalent(source, result.output)
+ black.assert_stable(source, result.output, line_length=ll)
def test_piping_diff(self) -> None:
+ diff_header = re.compile(
+ rf"(STDIN|STDOUT)\t\d\d\d\d-\d\d-\d\d "
+ rf"\d\d:\d\d:\d\d\.\d\d\d\d\d\d \+\d\d\d\d"
+ )
source, _ = read_data("expression.py")
expected, _ = read_data("expression.diff")
- hold_stdin, hold_stdout = sys.stdin, sys.stdout
- try:
- sys.stdin = TextIOWrapper(BytesIO(source.encode("utf8")), encoding="utf8")
- sys.stdout = TextIOWrapper(BytesIO(), encoding="utf8")
- sys.stdin.buffer.name = "<stdin>" # type: ignore
- black.format_stdin_to_stdout(
- line_length=ll, fast=True, write_back=black.WriteBack.DIFF
- )
- sys.stdout.seek(0)
- actual = sys.stdout.read()
- finally:
- sys.stdin, sys.stdout = hold_stdin, hold_stdout
+ config = THIS_DIR / "data" / "empty_pyproject.toml"
+ stderrbuf = BytesIO()
+ args = ["-", "--fast", f"--line-length={ll}", "--diff", f"--config={config}"]
+ result = BlackRunner(stderrbuf).invoke(
+ black.main, args, input=BytesIO(source.encode("utf8"))
+ )
+ self.assertEqual(result.exit_code, 0)
+ actual = diff_header.sub("[Deterministic header]", result.output)
actual = actual.rstrip() + "\n" # the diff output has a trailing space
self.assertEqual(expected, actual)
@patch("black.dump_to_file", dump_to_stderr)
def test_setup(self) -> None:
- source, expected = read_data("../setup")
+ source, expected = read_data("../setup", data=False)
actual = fs(source)
self.assertFormatEqual(expected, actual)
black.assert_equivalent(source, actual)
source, _ = read_data("expression.py")
expected, _ = read_data("expression.diff")
tmp_file = Path(black.dump_to_file(source))
- hold_stdout = sys.stdout
+ diff_header = re.compile(
+ rf"{re.escape(str(tmp_file))}\t\d\d\d\d-\d\d-\d\d "
+ rf"\d\d:\d\d:\d\d\.\d\d\d\d\d\d \+\d\d\d\d"
+ )
+ stderrbuf = BytesIO()
try:
- sys.stdout = TextIOWrapper(BytesIO(), encoding="utf8")
- self.assertTrue(ff(tmp_file, write_back=black.WriteBack.DIFF))
- sys.stdout.seek(0)
- actual = sys.stdout.read()
- actual = actual.replace(str(tmp_file), "<stdin>")
+ result = BlackRunner(stderrbuf).invoke(
+ black.main, ["--diff", str(tmp_file)]
+ )
+ self.assertEqual(result.exit_code, 0)
finally:
- sys.stdout = hold_stdout
os.unlink(tmp_file)
+ actual = result.output
+ actual = diff_header.sub("[Deterministic header]", actual)
actual = actual.rstrip() + "\n" # the diff output has a trailing space
if expected != actual:
dump = black.dump_to_file(actual)
black.assert_equivalent(source, actual)
black.assert_stable(source, actual, line_length=ll)
+ @patch("black.dump_to_file", dump_to_stderr)
+ def test_numeric_literals(self) -> None:
+ source, expected = read_data("numeric_literals")
+ actual = fs(source, mode=black.FileMode.PYTHON36)
+ self.assertFormatEqual(expected, actual)
+ black.assert_equivalent(source, actual)
+ black.assert_stable(source, actual, line_length=ll)
+
+ @patch("black.dump_to_file", dump_to_stderr)
+ def test_numeric_literals_py2(self) -> None:
+ source, expected = read_data("numeric_literals_py2")
+ actual = fs(source)
+ self.assertFormatEqual(expected, actual)
+ black.assert_stable(source, actual, line_length=ll)
+
@patch("black.dump_to_file", dump_to_stderr)
def test_python2(self) -> None:
source, expected = read_data("python2")
black.assert_equivalent(source, actual)
black.assert_stable(source, actual, line_length=ll)
+ @patch("black.dump_to_file", dump_to_stderr)
+ def test_fmtonoff2(self) -> None:
+ source, expected = read_data("fmtonoff2")
+ actual = fs(source)
+ self.assertFormatEqual(expected, actual)
+ black.assert_equivalent(source, actual)
+ black.assert_stable(source, actual, line_length=ll)
+
@patch("black.dump_to_file", dump_to_stderr)
def test_remove_empty_parentheses_after_class(self) -> None:
source, expected = read_data("class_blank_parentheses")
self.assertEqual(set(), black.get_future_imports(node))
node = black.lib2to3_parse("from some.module import black\n")
self.assertEqual(set(), black.get_future_imports(node))
+ node = black.lib2to3_parse(
+ "from __future__ import unicode_literals as _unicode_literals"
+ )
+ self.assertEqual({"unicode_literals"}, black.get_future_imports(node))
+ node = black.lib2to3_parse(
+ "from __future__ import unicode_literals as _lol, print"
+ )
+ self.assertEqual({"unicode_literals", "print"}, black.get_future_imports(node))
def test_debug_visitor(self) -> None:
source, _ = read_data("debug_visitor.py")
def test_no_cache_when_stdin(self) -> None:
mode = black.FileMode.AUTO_DETECT
with cache_dir():
- result = CliRunner().invoke(black.main, ["-"], input="print('hello')")
+ result = CliRunner().invoke(
+ black.main, ["-"], input=BytesIO(b"print('hello')")
+ )
self.assertEqual(result.exit_code, 0)
cache_file = black.get_cache_file(black.DEFAULT_LINE_LENGTH, mode)
self.assertFalse(cache_file.exists())
def test_check_diff_use_together(self) -> None:
with cache_dir():
# Files which will be reformatted.
- src1 = (THIS_DIR / "string_quotes.py").resolve()
+ src1 = (THIS_DIR / "data" / "string_quotes.py").resolve()
result = CliRunner().invoke(black.main, [str(src1), "--diff", "--check"])
- self.assertEqual(result.exit_code, 1)
-
+ self.assertEqual(result.exit_code, 1, result.output)
# Files which will not be reformatted.
- src2 = (THIS_DIR / "composition.py").resolve()
+ src2 = (THIS_DIR / "data" / "composition.py").resolve()
result = CliRunner().invoke(black.main, [str(src2), "--diff", "--check"])
- self.assertEqual(result.exit_code, 0)
-
+ self.assertEqual(result.exit_code, 0, result.output)
# Multi file command.
result = CliRunner().invoke(
black.main, [str(src1), str(src2), "--diff", "--check"]
def test_pipe_force_pyi(self) -> None:
source, expected = read_data("force_pyi")
- result = CliRunner().invoke(black.main, ["-", "-q", "--pyi"], input=source)
+ result = CliRunner().invoke(
+ black.main, ["-", "-q", "--pyi"], input=BytesIO(source.encode("utf8"))
+ )
self.assertEqual(result.exit_code, 0)
actual = result.output
self.assertFormatEqual(actual, expected)
def test_pipe_force_py36(self) -> None:
source, expected = read_data("force_py36")
- result = CliRunner().invoke(black.main, ["-", "-q", "--py36"], input=source)
+ result = CliRunner().invoke(
+ black.main, ["-", "-q", "--py36"], input=BytesIO(source.encode("utf8"))
+ )
self.assertEqual(result.exit_code, 0)
actual = result.output
self.assertFormatEqual(actual, expected)
def test_include_exclude(self) -> None:
- path = THIS_DIR / "include_exclude_tests"
+ path = THIS_DIR / "data" / "include_exclude_tests"
include = re.compile(r"\.pyi?$")
exclude = re.compile(r"/exclude/|/\.definitely_exclude/")
report = black.Report()
sources: List[Path] = []
expected = [
- Path(THIS_DIR / "include_exclude_tests/b/dont_exclude/a.py"),
- Path(THIS_DIR / "include_exclude_tests/b/dont_exclude/a.pyi"),
+ Path(path / "b/dont_exclude/a.py"),
+ Path(path / "b/dont_exclude/a.pyi"),
]
this_abs = THIS_DIR.resolve()
sources.extend(
self.assertEqual(sorted(expected), sorted(sources))
def test_empty_include(self) -> None:
- path = THIS_DIR / "include_exclude_tests"
+ path = THIS_DIR / "data" / "include_exclude_tests"
report = black.Report()
empty = re.compile(r"")
sources: List[Path] = []
self.assertEqual(sorted(expected), sorted(sources))
def test_empty_exclude(self) -> None:
- path = THIS_DIR / "include_exclude_tests"
+ path = THIS_DIR / "data" / "include_exclude_tests"
report = black.Report()
empty = re.compile(r"")
sources: List[Path] = []
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) # type: ignore
+ self.assertIn(nl.encode(), updated_contents)
if nl == "\n":
- self.assertNotIn(b"\r\n", updated_contents) # type: ignore
+ self.assertNotIn(b"\r\n", updated_contents)
+
+ def test_assert_equivalent_different_asts(self) -> None:
+ with self.assertRaises(AssertionError):
+ black.assert_equivalent("{}", "None")
+
+ def test_symlink_out_of_root_directory(self) -> None:
+ path = MagicMock()
+ root = THIS_DIR
+ child = MagicMock()
+ include = re.compile(black.DEFAULT_INCLUDES)
+ exclude = re.compile(black.DEFAULT_EXCLUDES)
+ report = black.Report()
+ # `child` should behave like a symlink which resolved path is clearly
+ # outside of the `root` directory.
+ path.iterdir.return_value = [child]
+ child.resolve.return_value = Path("/a/b/c")
+ child.is_symlink.return_value = True
+ try:
+ list(black.gen_python_files_in_dir(path, root, include, exclude, report))
+ except ValueError as ve:
+ self.fail("`get_python_files_in_dir()` failed: {ve}")
+ path.iterdir.assert_called_once()
+ child.resolve.assert_called_once()
+ child.is_symlink.assert_called_once()
+ # `child` should behave like a strange file which resolved path is clearly
+ # outside of the `root` directory.
+ child.is_symlink.return_value = False
+ with self.assertRaises(ValueError):
+ list(black.gen_python_files_in_dir(path, root, include, exclude, report))
+ path.iterdir.assert_called()
+ self.assertEqual(path.iterdir.call_count, 2)
+ child.resolve.assert_called()
+ self.assertEqual(child.resolve.call_count, 2)
+ child.is_symlink.assert_called()
+ self.assertEqual(child.is_symlink.call_count, 2)
+
+ def test_shhh_click(self) -> None:
+ try:
+ from click import _unicodefun # type: ignore
+ except ModuleNotFoundError:
+ self.skipTest("Incompatible Click version")
+ if not hasattr(_unicodefun, "_verify_python3_env"):
+ self.skipTest("Incompatible Click version")
+ # First, let's see if Click is crashing with a preferred ASCII charset.
+ with patch("locale.getpreferredencoding") as gpe:
+ gpe.return_value = "ASCII"
+ with self.assertRaises(RuntimeError):
+ _unicodefun._verify_python3_env()
+ # Now, let's silence Click...
+ black.patch_click()
+ # ...and confirm it's silent.
+ with patch("locale.getpreferredencoding") as gpe:
+ gpe.return_value = "ASCII"
+ try:
+ _unicodefun._verify_python3_env()
+ except RuntimeError as re:
+ self.fail(f"`patch_click()` failed, exception still raised: {re}")
if __name__ == "__main__":
- unittest.main()
+ unittest.main(module="test_black")
projects / etc / vim.git / blobdiff