#!/usr/bin/env python3
-from functools import partial
-from io import StringIO
+import multiprocessing
+import asyncio
+import logging
+from concurrent.futures import ThreadPoolExecutor
+from contextlib import contextmanager
+from dataclasses import replace
+import inspect
+from io import BytesIO, TextIOWrapper
import os
from pathlib import Path
+from platform import system
+import regex as re
import sys
-from typing import Any, List, Tuple
+from tempfile import TemporaryDirectory
+import types
+from typing import (
+ Any,
+ BinaryIO,
+ Callable,
+ Dict,
+ Generator,
+ List,
+ Iterator,
+ TypeVar,
+)
import unittest
-from unittest.mock import patch
+from unittest.mock import patch, MagicMock
+import click
from click import unstyle
+from click.testing import CliRunner
import black
+from black import Feature, TargetVersion
+
+from pathspec import PathSpec
+
+# Import other test classes
+from tests.util import (
+ THIS_DIR,
+ read_data,
+ DETERMINISTIC_HEADER,
+ BlackBaseTestCase,
+ DEFAULT_MODE,
+ fs,
+ ff,
+ dump_to_stderr,
+)
+from .test_primer import PrimerCLITests # noqa: F401
+
-ll = 88
-ff = partial(black.format_file_in_place, line_length=ll, fast=True)
-fs = partial(black.format_str, line_length=ll)
THIS_FILE = Path(__file__)
-THIS_DIR = THIS_FILE.parent
-EMPTY_LINE = "# EMPTY LINE WITH WHITESPACE" + " (this comment will be removed)"
-
-
-def dump_to_stderr(*output: str) -> str:
- return "\n" + "\n".join(output) + "\n"
-
-
-def read_data(name: str) -> Tuple[str, str]:
- """read_data('test_name') -> 'input', 'output'"""
- if not name.endswith((".py", ".out", ".diff")):
- name += ".py"
- _input: List[str] = []
- _output: List[str] = []
- with open(THIS_DIR / name, "r", encoding="utf8") as test:
- lines = test.readlines()
- result = _input
- for line in lines:
- line = line.replace(EMPTY_LINE, "")
- if line.rstrip() == "# output":
- result = _output
- continue
-
- result.append(line)
- if _input and not _output:
- # If there's no output marker, treat the entire file as already pre-formatted.
- _output = _input[:]
- return "".join(_input).strip() + "\n", "".join(_output).strip() + "\n"
-
-
-class BlackTestCase(unittest.TestCase):
- maxDiff = None
-
- def assertFormatEqual(self, expected: str, actual: str) -> None:
- if actual != expected and not os.environ.get("SKIP_AST_PRINT"):
- bdv: black.DebugVisitor[Any]
- black.out("Expected tree:", fg="green")
- try:
- exp_node = black.lib2to3_parse(expected)
- bdv = black.DebugVisitor()
- list(bdv.visit(exp_node))
- except Exception as ve:
- black.err(str(ve))
- black.out("Actual tree:", fg="red")
+PY36_VERSIONS = {
+ TargetVersion.PY36,
+ TargetVersion.PY37,
+ TargetVersion.PY38,
+ TargetVersion.PY39,
+}
+PY36_ARGS = [f"--target-version={version.name.lower()}" for version in PY36_VERSIONS]
+T = TypeVar("T")
+R = TypeVar("R")
+
+
+@contextmanager
+def cache_dir(exists: bool = True) -> Iterator[Path]:
+ with TemporaryDirectory() as workspace:
+ cache_dir = Path(workspace)
+ if not exists:
+ cache_dir = cache_dir / "new"
+ with patch("black.CACHE_DIR", cache_dir):
+ yield cache_dir
+
+
+@contextmanager
+def event_loop() -> Iterator[None]:
+ policy = asyncio.get_event_loop_policy()
+ loop = policy.new_event_loop()
+ asyncio.set_event_loop(loop)
+ try:
+ yield
+
+ finally:
+ loop.close()
+
+
+class FakeContext(click.Context):
+ """A fake click Context for when calling functions that need it."""
+
+ def __init__(self) -> None:
+ self.default_map: Dict[str, Any] = {}
+
+
+class FakeParameter(click.Parameter):
+ """A fake click Parameter for when calling functions that need it."""
+
+ def __init__(self) -> None:
+ pass
+
+
+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) -> 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:
- exp_node = black.lib2to3_parse(actual)
- bdv = black.DebugVisitor()
- list(bdv.visit(exp_node))
- except Exception as ve:
- black.err(str(ve))
- self.assertEqual(expected, actual)
+ 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
- @patch("black.dump_to_file", dump_to_stderr)
- def test_self(self) -> None:
- source, expected = read_data("test_black")
- actual = fs(source)
- self.assertFormatEqual(expected, actual)
- black.assert_equivalent(source, actual)
- black.assert_stable(source, actual, line_length=ll)
- self.assertFalse(ff(THIS_FILE))
+
+class BlackTestCase(BlackBaseTestCase):
+ def invokeBlack(
+ self, args: List[str], exit_code: int = 0, ignore_config: bool = True
+ ) -> None:
+ runner = BlackRunner()
+ if ignore_config:
+ args = ["--verbose", "--config", str(THIS_DIR / "empty.toml"), *args]
+ result = runner.invoke(black.main, args)
+ 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"exception: {result.exception}"
+ ),
+ )
@patch("black.dump_to_file", dump_to_stderr)
- def test_black(self) -> None:
- source, expected = read_data("../black")
+ 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)
- self.assertFalse(ff(THIS_DIR / ".." / "black.py"))
+ black.assert_stable(source, actual, DEFAULT_MODE)
- def test_piping(self) -> None:
- source, expected = read_data("../black")
- hold_stdin, hold_stdout = sys.stdin, sys.stdout
+ def test_empty_ff(self) -> None:
+ expected = ""
+ tmp_file = Path(black.dump_to_file())
try:
- sys.stdin, sys.stdout = StringIO(source), StringIO()
- sys.stdin.name = "<stdin>"
- black.format_stdin_to_stdout(
- line_length=ll, fast=True, write_back=black.WriteBack.YES
- )
- sys.stdout.seek(0)
- actual = sys.stdout.read()
+ self.assertFalse(ff(tmp_file, write_back=black.WriteBack.YES))
+ with open(tmp_file, encoding="utf8") as f:
+ actual = f.read()
finally:
- sys.stdin, sys.stdout = hold_stdin, hold_stdout
+ os.unlink(tmp_file)
self.assertFormatEqual(expected, actual)
- black.assert_equivalent(source, actual)
- black.assert_stable(source, actual, line_length=ll)
+
+ def test_piping(self) -> None:
+ source, expected = read_data("src/black/__init__", data=False)
+ result = BlackRunner().invoke(
+ black.main,
+ ["-", "--fast", f"--line-length={black.DEFAULT_LINE_LENGTH}"],
+ 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, DEFAULT_MODE)
def test_piping_diff(self) -> None:
+ diff_header = re.compile(
+ r"(STDIN|STDOUT)\t\d\d\d\d-\d\d-\d\d \d\d:\d\d:\d\d\.\d\d\d\d\d\d "
+ r"\+\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, sys.stdout = StringIO(source), StringIO()
- sys.stdin.name = "<stdin>"
- 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"
+ args = [
+ "-",
+ "--fast",
+ f"--line-length={black.DEFAULT_LINE_LENGTH}",
+ "--diff",
+ f"--config={config}",
+ ]
+ result = BlackRunner().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)
+ def test_piping_diff_with_color(self) -> None:
+ source, _ = read_data("expression.py")
+ config = THIS_DIR / "data" / "empty_pyproject.toml"
+ args = [
+ "-",
+ "--fast",
+ f"--line-length={black.DEFAULT_LINE_LENGTH}",
+ "--diff",
+ "--color",
+ f"--config={config}",
+ ]
+ result = BlackRunner().invoke(
+ black.main, args, input=BytesIO(source.encode("utf8"))
+ )
+ actual = result.output
+ # Again, the contents are checked in a different test, so only look for colors.
+ self.assertIn("\033[1;37m", actual)
+ self.assertIn("\033[36m", actual)
+ self.assertIn("\033[32m", actual)
+ self.assertIn("\033[31m", actual)
+ self.assertIn("\033[0m", actual)
+
@patch("black.dump_to_file", dump_to_stderr)
- def test_setup(self) -> None:
- source, expected = read_data("../setup")
- actual = fs(source)
+ def _test_wip(self) -> None:
+ source, expected = read_data("wip")
+ sys.settrace(tracefunc)
+ mode = replace(
+ DEFAULT_MODE,
+ experimental_string_processing=False,
+ target_versions={black.TargetVersion.PY38},
+ )
+ actual = fs(source, mode=mode)
+ sys.settrace(None)
self.assertFormatEqual(expected, actual)
black.assert_equivalent(source, actual)
- black.assert_stable(source, actual, line_length=ll)
- self.assertFalse(ff(THIS_DIR / ".." / "setup.py"))
+ black.assert_stable(source, actual, black.FileMode())
+ @unittest.expectedFailure
@patch("black.dump_to_file", dump_to_stderr)
- def test_function(self) -> None:
- source, expected = read_data("function")
+ def test_trailing_comma_optional_parens_stability1(self) -> None:
+ source, _expected = read_data("trailing_comma_optional_parens1")
actual = fs(source)
- self.assertFormatEqual(expected, actual)
- black.assert_equivalent(source, actual)
- black.assert_stable(source, actual, line_length=ll)
+ black.assert_stable(source, actual, DEFAULT_MODE)
+ @unittest.expectedFailure
@patch("black.dump_to_file", dump_to_stderr)
- def test_expression(self) -> None:
- source, expected = read_data("expression")
+ def test_trailing_comma_optional_parens_stability2(self) -> None:
+ source, _expected = read_data("trailing_comma_optional_parens2")
+ actual = fs(source)
+ black.assert_stable(source, actual, DEFAULT_MODE)
+
+ @unittest.expectedFailure
+ @patch("black.dump_to_file", dump_to_stderr)
+ def test_trailing_comma_optional_parens_stability3(self) -> None:
+ source, _expected = read_data("trailing_comma_optional_parens3")
+ actual = fs(source)
+ black.assert_stable(source, actual, DEFAULT_MODE)
+
+ @patch("black.dump_to_file", dump_to_stderr)
+ def test_pep_572(self) -> None:
+ source, expected = read_data("pep_572")
actual = fs(source)
self.assertFormatEqual(expected, actual)
- black.assert_equivalent(source, actual)
- black.assert_stable(source, actual, line_length=ll)
+ black.assert_stable(source, actual, DEFAULT_MODE)
+ if sys.version_info >= (3, 8):
+ black.assert_equivalent(source, actual)
+
+ def test_pep_572_version_detection(self) -> None:
+ source, _ = read_data("pep_572")
+ root = black.lib2to3_parse(source)
+ features = black.get_features_used(root)
+ self.assertIn(black.Feature.ASSIGNMENT_EXPRESSIONS, features)
+ versions = black.detect_target_versions(root)
+ self.assertIn(black.TargetVersion.PY38, versions)
def test_expression_ff(self) -> None:
source, expected = read_data("expression")
self.assertFormatEqual(expected, actual)
with patch("black.dump_to_file", dump_to_stderr):
black.assert_equivalent(source, actual)
- black.assert_stable(source, actual, line_length=ll)
+ black.assert_stable(source, actual, DEFAULT_MODE)
def test_expression_diff(self) -> None:
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 "
+ r"\d\d:\d\d:\d\d\.\d\d\d\d\d\d \+\d\d\d\d"
+ )
try:
- sys.stdout = StringIO()
- self.assertTrue(ff(tmp_file, write_back=black.WriteBack.DIFF))
- sys.stdout.seek(0)
- actual = sys.stdout.read()
- actual = actual.replace(tmp_file.name, "<stdin>")
+ result = BlackRunner().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)
msg = (
- f"Expected diff isn't equal to the actual. If you made changes "
- f"to expression.py and this is an anticipated difference, "
- f"overwrite tests/expression.diff with {dump}"
+ "Expected diff isn't equal to the actual. If you made changes to"
+ " expression.py and this is an anticipated difference, overwrite"
+ f" tests/data/expression.diff with {dump}"
)
self.assertEqual(expected, actual, msg)
+ def test_expression_diff_with_color(self) -> None:
+ source, _ = read_data("expression.py")
+ expected, _ = read_data("expression.diff")
+ tmp_file = Path(black.dump_to_file(source))
+ try:
+ result = BlackRunner().invoke(
+ black.main, ["--diff", "--color", str(tmp_file)]
+ )
+ finally:
+ os.unlink(tmp_file)
+ actual = result.output
+ # We check the contents of the diff in `test_expression_diff`. All
+ # we need to check here is that color codes exist in the result.
+ self.assertIn("\033[1;37m", actual)
+ self.assertIn("\033[36m", actual)
+ self.assertIn("\033[32m", actual)
+ self.assertIn("\033[31m", actual)
+ self.assertIn("\033[0m", actual)
+
@patch("black.dump_to_file", dump_to_stderr)
- def test_fstring(self) -> None:
- source, expected = read_data("fstring")
+ def test_pep_570(self) -> None:
+ source, expected = read_data("pep_570")
actual = fs(source)
self.assertFormatEqual(expected, actual)
- black.assert_equivalent(source, actual)
- black.assert_stable(source, actual, line_length=ll)
+ black.assert_stable(source, actual, DEFAULT_MODE)
+ if sys.version_info >= (3, 8):
+ black.assert_equivalent(source, actual)
+
+ def test_detect_pos_only_arguments(self) -> None:
+ source, _ = read_data("pep_570")
+ root = black.lib2to3_parse(source)
+ features = black.get_features_used(root)
+ self.assertIn(black.Feature.POS_ONLY_ARGUMENTS, features)
+ versions = black.detect_target_versions(root)
+ self.assertIn(black.TargetVersion.PY38, versions)
@patch("black.dump_to_file", dump_to_stderr)
def test_string_quotes(self) -> None:
actual = fs(source)
self.assertFormatEqual(expected, actual)
black.assert_equivalent(source, actual)
- black.assert_stable(source, actual, line_length=ll)
+ black.assert_stable(source, actual, DEFAULT_MODE)
+ mode = replace(DEFAULT_MODE, string_normalization=False)
+ not_normalized = fs(source, mode=mode)
+ self.assertFormatEqual(source.replace("\\\n", ""), not_normalized)
+ black.assert_equivalent(source, not_normalized)
+ black.assert_stable(source, not_normalized, mode=mode)
@patch("black.dump_to_file", dump_to_stderr)
- def test_comments(self) -> None:
- source, expected = read_data("comments")
- actual = fs(source)
+ def test_docstring_no_string_normalization(self) -> None:
+ """Like test_docstring but with string normalization off."""
+ source, expected = read_data("docstring_no_string_normalization")
+ mode = replace(DEFAULT_MODE, string_normalization=False)
+ actual = fs(source, mode=mode)
self.assertFormatEqual(expected, actual)
black.assert_equivalent(source, actual)
- black.assert_stable(source, actual, line_length=ll)
+ black.assert_stable(source, actual, mode)
- @patch("black.dump_to_file", dump_to_stderr)
- def test_comments2(self) -> None:
- source, expected = read_data("comments2")
- actual = fs(source)
+ def test_long_strings_flag_disabled(self) -> None:
+ """Tests for turning off the string processing logic."""
+ source, expected = read_data("long_strings_flag_disabled")
+ mode = replace(DEFAULT_MODE, experimental_string_processing=False)
+ actual = fs(source, mode=mode)
self.assertFormatEqual(expected, actual)
- black.assert_equivalent(source, actual)
- black.assert_stable(source, actual, line_length=ll)
+ black.assert_stable(expected, actual, mode)
@patch("black.dump_to_file", dump_to_stderr)
- def test_comments3(self) -> None:
- source, expected = read_data("comments3")
- actual = fs(source)
+ def test_numeric_literals(self) -> None:
+ source, expected = read_data("numeric_literals")
+ mode = replace(DEFAULT_MODE, target_versions=PY36_VERSIONS)
+ actual = fs(source, mode=mode)
self.assertFormatEqual(expected, actual)
black.assert_equivalent(source, actual)
- black.assert_stable(source, actual, line_length=ll)
+ black.assert_stable(source, actual, mode)
@patch("black.dump_to_file", dump_to_stderr)
- def test_comments4(self) -> None:
- source, expected = read_data("comments4")
- actual = fs(source)
+ def test_numeric_literals_ignoring_underscores(self) -> None:
+ source, expected = read_data("numeric_literals_skip_underscores")
+ mode = replace(DEFAULT_MODE, target_versions=PY36_VERSIONS)
+ actual = fs(source, mode=mode)
self.assertFormatEqual(expected, actual)
black.assert_equivalent(source, actual)
- black.assert_stable(source, actual, line_length=ll)
+ black.assert_stable(source, actual, mode)
@patch("black.dump_to_file", dump_to_stderr)
- def test_cantfit(self) -> None:
- source, expected = read_data("cantfit")
- actual = fs(source)
+ def test_python2_print_function(self) -> None:
+ source, expected = read_data("python2_print_function")
+ mode = replace(DEFAULT_MODE, target_versions={TargetVersion.PY27})
+ actual = fs(source, mode=mode)
self.assertFormatEqual(expected, actual)
black.assert_equivalent(source, actual)
- black.assert_stable(source, actual, line_length=ll)
+ black.assert_stable(source, actual, mode)
@patch("black.dump_to_file", dump_to_stderr)
- def test_import_spacing(self) -> None:
- source, expected = read_data("import_spacing")
- actual = fs(source)
+ def test_stub(self) -> None:
+ mode = replace(DEFAULT_MODE, is_pyi=True)
+ source, expected = read_data("stub.pyi")
+ actual = fs(source, mode=mode)
self.assertFormatEqual(expected, actual)
- black.assert_equivalent(source, actual)
- black.assert_stable(source, actual, line_length=ll)
+ black.assert_stable(source, actual, mode)
@patch("black.dump_to_file", dump_to_stderr)
- def test_composition(self) -> None:
- source, expected = read_data("composition")
+ def test_async_as_identifier(self) -> None:
+ source_path = (THIS_DIR / "data" / "async_as_identifier.py").resolve()
+ source, expected = read_data("async_as_identifier")
actual = fs(source)
self.assertFormatEqual(expected, actual)
- black.assert_equivalent(source, actual)
- black.assert_stable(source, actual, line_length=ll)
+ major, minor = sys.version_info[:2]
+ if major < 3 or (major <= 3 and minor < 7):
+ black.assert_equivalent(source, actual)
+ black.assert_stable(source, actual, DEFAULT_MODE)
+ # ensure black can parse this when the target is 3.6
+ self.invokeBlack([str(source_path), "--target-version", "py36"])
+ # but not on 3.7, because async/await is no longer an identifier
+ self.invokeBlack([str(source_path), "--target-version", "py37"], exit_code=123)
@patch("black.dump_to_file", dump_to_stderr)
- def test_empty_lines(self) -> None:
- source, expected = read_data("empty_lines")
+ def test_python37(self) -> None:
+ source_path = (THIS_DIR / "data" / "python37.py").resolve()
+ source, expected = read_data("python37")
actual = fs(source)
self.assertFormatEqual(expected, actual)
- black.assert_equivalent(source, actual)
- black.assert_stable(source, actual, line_length=ll)
+ major, minor = sys.version_info[:2]
+ if major > 3 or (major == 3 and minor >= 7):
+ black.assert_equivalent(source, actual)
+ black.assert_stable(source, actual, DEFAULT_MODE)
+ # ensure black can parse this when the target is 3.7
+ self.invokeBlack([str(source_path), "--target-version", "py37"])
+ # but not on 3.6, because we use async as a reserved keyword
+ self.invokeBlack([str(source_path), "--target-version", "py36"], exit_code=123)
@patch("black.dump_to_file", dump_to_stderr)
- def test_python2(self) -> None:
- source, expected = read_data("python2")
+ def test_python38(self) -> None:
+ source, expected = read_data("python38")
actual = fs(source)
self.assertFormatEqual(expected, actual)
- # black.assert_equivalent(source, actual)
- black.assert_stable(source, actual, line_length=ll)
+ major, minor = sys.version_info[:2]
+ if major > 3 or (major == 3 and minor >= 8):
+ black.assert_equivalent(source, actual)
+ black.assert_stable(source, actual, DEFAULT_MODE)
@patch("black.dump_to_file", dump_to_stderr)
- def test_fmtonoff(self) -> None:
- source, expected = read_data("fmtonoff")
+ def test_python39(self) -> None:
+ source, expected = read_data("python39")
actual = fs(source)
self.assertFormatEqual(expected, actual)
- black.assert_equivalent(source, actual)
- black.assert_stable(source, actual, line_length=ll)
+ major, minor = sys.version_info[:2]
+ if major > 3 or (major == 3 and minor >= 9):
+ black.assert_equivalent(source, actual)
+ black.assert_stable(source, actual, DEFAULT_MODE)
- def test_report(self) -> None:
- report = black.Report()
+ def test_tab_comment_indentation(self) -> None:
+ contents_tab = "if 1:\n\tif 2:\n\t\tpass\n\t# comment\n\tpass\n"
+ contents_spc = "if 1:\n if 2:\n pass\n # comment\n pass\n"
+ self.assertFormatEqual(contents_spc, fs(contents_spc))
+ self.assertFormatEqual(contents_spc, fs(contents_tab))
+
+ contents_tab = "if 1:\n\tif 2:\n\t\tpass\n\t\t# comment\n\tpass\n"
+ contents_spc = "if 1:\n if 2:\n pass\n # comment\n pass\n"
+ self.assertFormatEqual(contents_spc, fs(contents_spc))
+ self.assertFormatEqual(contents_spc, fs(contents_tab))
+
+ # mixed tabs and spaces (valid Python 2 code)
+ contents_tab = "if 1:\n if 2:\n\t\tpass\n\t# comment\n pass\n"
+ contents_spc = "if 1:\n if 2:\n pass\n # comment\n pass\n"
+ self.assertFormatEqual(contents_spc, fs(contents_spc))
+ self.assertFormatEqual(contents_spc, fs(contents_tab))
+
+ contents_tab = "if 1:\n if 2:\n\t\tpass\n\t\t# comment\n pass\n"
+ contents_spc = "if 1:\n if 2:\n pass\n # comment\n pass\n"
+ self.assertFormatEqual(contents_spc, fs(contents_spc))
+ self.assertFormatEqual(contents_spc, fs(contents_tab))
+
+ def test_report_verbose(self) -> None:
+ report = black.Report(verbose=True)
out_lines = []
err_lines = []
err_lines.append(msg)
with patch("black.out", out), patch("black.err", err):
- report.done(Path("f1"), changed=False)
+ report.done(Path("f1"), black.Changed.NO)
self.assertEqual(len(out_lines), 1)
self.assertEqual(len(err_lines), 0)
self.assertEqual(out_lines[-1], "f1 already well formatted, good job.")
self.assertEqual(unstyle(str(report)), "1 file left unchanged.")
self.assertEqual(report.return_code, 0)
- report.done(Path("f2"), changed=True)
+ report.done(Path("f2"), black.Changed.YES)
self.assertEqual(len(out_lines), 2)
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), 3)
+ self.assertEqual(len(err_lines), 0)
+ self.assertEqual(
+ out_lines[-1], "f3 wasn't modified on disk since last run."
+ )
+ 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), 2)
+ self.assertEqual(len(out_lines), 3)
self.assertEqual(len(err_lines), 1)
self.assertEqual(err_lines[-1], "error: cannot format e1: boom")
self.assertEqual(
unstyle(str(report)),
- "1 file reformatted, 1 file left unchanged, "
- "1 file failed to reformat.",
+ "1 file reformatted, 2 files left unchanged, 1 file failed to"
+ " reformat.",
)
self.assertEqual(report.return_code, 123)
- report.done(Path("f3"), changed=True)
- self.assertEqual(len(out_lines), 3)
+ report.done(Path("f3"), black.Changed.YES)
+ self.assertEqual(len(out_lines), 4)
self.assertEqual(len(err_lines), 1)
self.assertEqual(out_lines[-1], "reformatted f3")
self.assertEqual(
unstyle(str(report)),
- "2 files reformatted, 1 file left unchanged, "
- "1 file failed to reformat.",
+ "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), 3)
+ self.assertEqual(len(out_lines), 4)
self.assertEqual(len(err_lines), 2)
self.assertEqual(err_lines[-1], "error: cannot format e2: boom")
self.assertEqual(
unstyle(str(report)),
- "2 files reformatted, 1 file left unchanged, "
- "2 files failed to reformat.",
+ "2 files reformatted, 2 files left unchanged, 2 files failed to"
+ " reformat.",
)
self.assertEqual(report.return_code, 123)
- report.done(Path("f4"), changed=False)
- self.assertEqual(len(out_lines), 4)
+ report.path_ignored(Path("wat"), "no match")
+ self.assertEqual(len(out_lines), 5)
+ self.assertEqual(len(err_lines), 2)
+ self.assertEqual(out_lines[-1], "wat ignored: no match")
+ 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), 6)
self.assertEqual(len(err_lines), 2)
self.assertEqual(out_lines[-1], "f4 already well formatted, good job.")
self.assertEqual(
unstyle(str(report)),
- "2 files reformatted, 2 files left unchanged, "
- "2 files failed to reformat.",
+ "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_quiet(self) -> None:
+ report = black.Report(quiet=True)
+ 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.out", out), patch("black.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), 0)
+ self.assertEqual(len(err_lines), 0)
+ self.assertEqual(
+ unstyle(str(report)), "1 file reformatted, 1 file left unchanged."
+ )
+ report.done(Path("f3"), black.Changed.CACHED)
+ self.assertEqual(len(out_lines), 0)
+ self.assertEqual(len(err_lines), 0)
+ 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), 0)
+ 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), 0)
+ self.assertEqual(len(err_lines), 1)
+ 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), 0)
+ 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), 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.out", out), patch("black.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, 2 files would be left unchanged, "
- "2 files would fail to reformat.",
+ "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.PY27})
+ black.lib2to3_parse(straddling, {TargetVersion.PY36})
+ black.lib2to3_parse(straddling, {TargetVersion.PY27, TargetVersion.PY36})
+
+ py2_only = "print x"
+ black.lib2to3_parse(py2_only)
+ black.lib2to3_parse(py2_only, {TargetVersion.PY27})
+ with self.assertRaises(black.InvalidInput):
+ black.lib2to3_parse(py2_only, {TargetVersion.PY36})
+ with self.assertRaises(black.InvalidInput):
+ black.lib2to3_parse(py2_only, {TargetVersion.PY27, TargetVersion.PY36})
+
+ py3_only = "exec(x, end=y)"
+ black.lib2to3_parse(py3_only)
+ with self.assertRaises(black.InvalidInput):
+ black.lib2to3_parse(py3_only, {TargetVersion.PY27})
+ black.lib2to3_parse(py3_only, {TargetVersion.PY36})
+ black.lib2to3_parse(py3_only, {TargetVersion.PY27, 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("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_is_python36(self) -> None:
+ def test_get_features_used(self) -> None:
node = black.lib2to3_parse("def f(*, arg): ...\n")
- self.assertFalse(black.is_python36(node))
+ self.assertEqual(black.get_features_used(node), set())
node = black.lib2to3_parse("def f(*, arg,): ...\n")
- self.assertTrue(black.is_python36(node))
+ 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.assertTrue(black.is_python36(node))
+ 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("function")
node = black.lib2to3_parse(source)
- self.assertTrue(black.is_python36(node))
+ 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.assertTrue(black.is_python36(node))
+ self.assertEqual(black.get_features_used(node), expected_features)
source, expected = read_data("expression")
node = black.lib2to3_parse(source)
- self.assertFalse(black.is_python36(node))
+ self.assertEqual(black.get_features_used(node), set())
node = black.lib2to3_parse(expected)
- self.assertFalse(black.is_python36(node))
+ self.assertEqual(black.get_features_used(node), set())
+
+ 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))
def test_debug_visitor(self) -> None:
source, _ = read_data("debug_visitor.py")
def test_format_file_contents(self) -> None:
empty = ""
+ mode = DEFAULT_MODE
with self.assertRaises(black.NothingChanged):
- black.format_file_contents(empty, line_length=ll, fast=False)
+ black.format_file_contents(empty, mode=mode, fast=False)
just_nl = "\n"
with self.assertRaises(black.NothingChanged):
- black.format_file_contents(just_nl, line_length=ll, fast=False)
- same = "l = [1, 2, 3]\n"
+ 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, line_length=ll, fast=False)
- different = "l = [1,2,3]"
+ black.format_file_contents(same, mode=mode, fast=False)
+ different = "j = [1,2,3]"
expected = same
- actual = black.format_file_contents(different, line_length=ll, fast=False)
+ actual = black.format_file_contents(different, mode=mode, fast=False)
self.assertEqual(expected, actual)
invalid = "return if you can"
- with self.assertRaises(ValueError) as e:
- black.format_file_contents(invalid, line_length=ll, fast=False)
+ 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")
def test_endmarker(self) -> None:
with patch("black.out", out), patch("black.err", err):
with self.assertRaises(AssertionError):
- self.assertFormatEqual("l = [1, 2, 3]", "l = [1, 2, 3,]")
+ self.assertFormatEqual("j = [1, 2, 3]", "j = [1, 2, 3,]")
out_str = "".join(out_lines)
self.assertTrue("Expected tree:" in out_str)
self.assertTrue("Actual tree:" in out_str)
self.assertEqual("".join(err_lines), "")
+ def test_cache_broken_file(self) -> None:
+ mode = DEFAULT_MODE
+ with cache_dir() as workspace:
+ cache_file = black.get_cache_file(mode)
+ with cache_file.open("w") as fobj:
+ fobj.write("this is not a pickle")
+ self.assertEqual(black.read_cache(mode), {})
+ src = (workspace / "test.py").resolve()
+ with src.open("w") as fobj:
+ fobj.write("print('hello')")
+ self.invokeBlack([str(src)])
+ cache = black.read_cache(mode)
+ self.assertIn(src, cache)
+
+ def test_cache_single_file_already_cached(self) -> None:
+ mode = DEFAULT_MODE
+ with cache_dir() as workspace:
+ src = (workspace / "test.py").resolve()
+ with src.open("w") as fobj:
+ fobj.write("print('hello')")
+ black.write_cache({}, [src], mode)
+ self.invokeBlack([str(src)])
+ with src.open("r") as fobj:
+ self.assertEqual(fobj.read(), "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)
+ self.invokeBlack([str(workspace)])
+ with one.open("r") as fobj:
+ self.assertEqual(fobj.read(), "print('hello')")
+ with two.open("r") as fobj:
+ self.assertEqual(fobj.read(), 'print("hello")\n')
+ cache = black.read_cache(mode)
+ self.assertIn(one, cache)
+ self.assertIn(two, cache)
+
+ def test_no_cache_when_writeback_diff(self) -> 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:
+ self.invokeBlack([str(src), "--diff"])
+ cache_file = black.get_cache_file(mode)
+ self.assertFalse(cache_file.exists())
+ write_cache.assert_not_called()
+ read_cache.assert_not_called()
+
+ def test_no_cache_when_writeback_color_diff(self) -> 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:
+ self.invokeBlack([str(src), "--diff", "--color"])
+ cache_file = black.get_cache_file(mode)
+ self.assertFalse(cache_file.exists())
+ write_cache.assert_not_called()
+ read_cache.assert_not_called()
+
+ @event_loop()
+ def test_output_locking_when_writeback_diff(self) -> 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:
+ self.invokeBlack(["--diff", str(workspace)], 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()
+
+ @event_loop()
+ def test_output_locking_when_writeback_color_diff(self) -> 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:
+ self.invokeBlack(["--diff", "--color", str(workspace)], 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')")
+ )
+ self.assertEqual(result.exit_code, 0)
+ cache_file = black.get_cache_file(mode)
+ self.assertFalse(cache_file.exists())
+
+ def test_read_cache_no_cachefile(self) -> None:
+ mode = DEFAULT_MODE
+ with cache_dir():
+ self.assertEqual(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)
+ self.assertIn(src, cache)
+ self.assertEqual(cache[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 = {cached: black.get_cache_info(cached), cached_but_changed: (0.0, 0)}
+ todo, done = black.filter_cached(
+ cache, {uncached, cached, cached_but_changed}
+ )
+ self.assertEqual(todo, {uncached, cached_but_changed})
+ self.assertEqual(done, {cached})
+
+ def test_write_cache_creates_directory_if_needed(self) -> None:
+ mode = DEFAULT_MODE
+ with cache_dir(exists=False) as workspace:
+ self.assertFalse(workspace.exists())
+ black.write_cache({}, [], mode)
+ self.assertTrue(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')
+ self.invokeBlack([str(workspace)], exit_code=123)
+ cache = black.read_cache(mode)
+ self.assertNotIn(failing, cache)
+ self.assertIn(clean, 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)
+
+ @event_loop()
+ @patch("black.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')
+ self.invokeBlack([str(workspace)])
+
+ @event_loop()
+ def test_check_diff_use_together(self) -> None:
+ with cache_dir():
+ # Files which will be reformatted.
+ src1 = (THIS_DIR / "data" / "string_quotes.py").resolve()
+ self.invokeBlack([str(src1), "--diff", "--check"], exit_code=1)
+ # Files which will not be reformatted.
+ src2 = (THIS_DIR / "data" / "composition.py").resolve()
+ self.invokeBlack([str(src2), "--diff", "--check"])
+ # Multi file command.
+ self.invokeBlack([str(src1), str(src2), "--diff", "--check"], exit_code=1)
+
+ def test_no_files(self) -> None:
+ with cache_dir():
+ # Without an argument, black exits with error code 0.
+ self.invokeBlack([])
+
+ def test_broken_symlink(self) -> None:
+ with cache_dir() as workspace:
+ symlink = workspace / "broken_link.py"
+ try:
+ symlink.symlink_to("nonexistent.py")
+ except OSError as e:
+ self.skipTest(f"Can't create symlinks: {e}")
+ self.invokeBlack([str(workspace.resolve())])
+
+ 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)
+ self.assertIn(path, one)
+ two = black.read_cache(short_mode)
+ self.assertNotIn(path, two)
+
+ def test_single_file_force_pyi(self) -> None:
+ pyi_mode = replace(DEFAULT_MODE, is_pyi=True)
+ contents, expected = read_data("force_pyi")
+ with cache_dir() as workspace:
+ path = (workspace / "file.py").resolve()
+ with open(path, "w") as fh:
+ fh.write(contents)
+ self.invokeBlack([str(path), "--pyi"])
+ with open(path, "r") as fh:
+ actual = fh.read()
+ # verify cache with --pyi is separate
+ pyi_cache = black.read_cache(pyi_mode)
+ self.assertIn(path, pyi_cache)
+ normal_cache = black.read_cache(DEFAULT_MODE)
+ self.assertNotIn(path, normal_cache)
+ 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("force_pyi")
+ with cache_dir() as workspace:
+ paths = [
+ (workspace / "file1.py").resolve(),
+ (workspace / "file2.py").resolve(),
+ ]
+ for path in paths:
+ with open(path, "w") as fh:
+ fh.write(contents)
+ self.invokeBlack([str(p) for p in paths] + ["--pyi"])
+ for path in paths:
+ with open(path, "r") as fh:
+ actual = fh.read()
+ self.assertEqual(actual, expected)
+ # verify cache with --pyi is separate
+ pyi_cache = black.read_cache(pyi_mode)
+ normal_cache = black.read_cache(reg_mode)
+ for path in paths:
+ self.assertIn(path, pyi_cache)
+ self.assertNotIn(path, normal_cache)
+
+ def test_pipe_force_pyi(self) -> None:
+ source, expected = read_data("force_pyi")
+ 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_single_file_force_py36(self) -> None:
+ reg_mode = DEFAULT_MODE
+ py36_mode = replace(DEFAULT_MODE, target_versions=PY36_VERSIONS)
+ source, expected = read_data("force_py36")
+ with cache_dir() as workspace:
+ path = (workspace / "file.py").resolve()
+ with open(path, "w") as fh:
+ fh.write(source)
+ self.invokeBlack([str(path), *PY36_ARGS])
+ with open(path, "r") as fh:
+ actual = fh.read()
+ # verify cache with --target-version is separate
+ py36_cache = black.read_cache(py36_mode)
+ self.assertIn(path, py36_cache)
+ normal_cache = black.read_cache(reg_mode)
+ self.assertNotIn(path, normal_cache)
+ 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("force_py36")
+ with cache_dir() as workspace:
+ paths = [
+ (workspace / "file1.py").resolve(),
+ (workspace / "file2.py").resolve(),
+ ]
+ for path in paths:
+ with open(path, "w") as fh:
+ fh.write(source)
+ self.invokeBlack([str(p) for p in paths] + PY36_ARGS)
+ for path in paths:
+ with open(path, "r") as fh:
+ actual = fh.read()
+ self.assertEqual(actual, expected)
+ # verify cache with --target-version is separate
+ pyi_cache = black.read_cache(py36_mode)
+ normal_cache = black.read_cache(reg_mode)
+ for path in paths:
+ self.assertIn(path, pyi_cache)
+ self.assertNotIn(path, normal_cache)
+
+ def test_pipe_force_py36(self) -> None:
+ source, expected = read_data("force_py36")
+ result = CliRunner().invoke(
+ black.main,
+ ["-", "-q", "--target-version=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 / "data" / "include_exclude_tests"
+ include = re.compile(r"\.pyi?$")
+ exclude = re.compile(r"/exclude/|/\.definitely_exclude/")
+ report = black.Report()
+ gitignore = PathSpec.from_lines("gitwildmatch", [])
+ sources: List[Path] = []
+ expected = [
+ Path(path / "b/dont_exclude/a.py"),
+ Path(path / "b/dont_exclude/a.pyi"),
+ ]
+ this_abs = THIS_DIR.resolve()
+ sources.extend(
+ black.gen_python_files(
+ path.iterdir(), this_abs, include, exclude, None, report, gitignore
+ )
+ )
+ self.assertEqual(sorted(expected), sorted(sources))
+
+ @patch("black.find_project_root", lambda *args: THIS_DIR.resolve())
+ def test_exclude_for_issue_1572(self) -> None:
+ # Exclude shouldn't touch files that were explicitly given to Black through the
+ # CLI. Exclude is supposed to only apply to the recursive discovery of files.
+ # https://github.com/psf/black/issues/1572
+ path = THIS_DIR / "data" / "include_exclude_tests"
+ include = ""
+ exclude = r"/exclude/|a\.py"
+ src = str(path / "b/exclude/a.py")
+ report = black.Report()
+ expected = [Path(path / "b/exclude/a.py")]
+ sources = list(
+ black.get_sources(
+ ctx=FakeContext(),
+ src=(src,),
+ quiet=True,
+ verbose=False,
+ include=include,
+ exclude=exclude,
+ force_exclude=None,
+ report=report,
+ )
+ )
+ self.assertEqual(sorted(expected), sorted(sources))
+
+ def test_gitignore_exclude(self) -> None:
+ path = THIS_DIR / "data" / "include_exclude_tests"
+ include = re.compile(r"\.pyi?$")
+ 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, report, gitignore
+ )
+ )
+ self.assertEqual(sorted(expected), sorted(sources))
+
+ def test_empty_include(self) -> None:
+ path = THIS_DIR / "data" / "include_exclude_tests"
+ report = black.Report()
+ gitignore = PathSpec.from_lines("gitwildmatch", [])
+ empty = re.compile(r"")
+ sources: List[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"),
+ ]
+ this_abs = THIS_DIR.resolve()
+ sources.extend(
+ black.gen_python_files(
+ path.iterdir(),
+ this_abs,
+ empty,
+ re.compile(black.DEFAULT_EXCLUDES),
+ None,
+ report,
+ gitignore,
+ )
+ )
+ self.assertEqual(sorted(expected), sorted(sources))
+
+ def test_empty_exclude(self) -> None:
+ path = THIS_DIR / "data" / "include_exclude_tests"
+ report = black.Report()
+ gitignore = PathSpec.from_lines("gitwildmatch", [])
+ empty = re.compile(r"")
+ sources: List[Path] = []
+ expected = [
+ Path(path / "b/dont_exclude/a.py"),
+ Path(path / "b/dont_exclude/a.pyi"),
+ Path(path / "b/exclude/a.py"),
+ Path(path / "b/exclude/a.pyi"),
+ Path(path / "b/.definitely_exclude/a.py"),
+ Path(path / "b/.definitely_exclude/a.pyi"),
+ ]
+ this_abs = THIS_DIR.resolve()
+ sources.extend(
+ black.gen_python_files(
+ path.iterdir(),
+ this_abs,
+ re.compile(black.DEFAULT_INCLUDES),
+ empty,
+ None,
+ report,
+ gitignore,
+ )
+ )
+ self.assertEqual(sorted(expected), sorted(sources))
+
+ def test_invalid_include_exclude(self) -> None:
+ for option in ["--include", "--exclude"]:
+ self.invokeBlack(["-", option, "**()(!!*)"], exit_code=2)
+
+ 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("utf8"))
+ )
+ self.assertEqual(result.exit_code, 0)
+ output = runner.stdout_bytes
+ self.assertIn(nl.encode("utf8"), output)
+ if nl == "\n":
+ self.assertNotIn(b"\r\n", output)
+
+ 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.resolve()
+ child = MagicMock()
+ include = re.compile(black.DEFAULT_INCLUDES)
+ exclude = re.compile(black.DEFAULT_EXCLUDES)
+ report = black.Report()
+ gitignore = PathSpec.from_lines("gitwildmatch", [])
+ # `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.as_posix.return_value = "/a/b/c"
+ child.is_symlink.return_value = True
+ try:
+ list(
+ black.gen_python_files(
+ path.iterdir(), root, include, exclude, None, report, gitignore
+ )
+ )
+ except ValueError as ve:
+ self.fail(f"`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(
+ path.iterdir(), root, include, exclude, None, report, gitignore
+ )
+ )
+ 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}")
+
+ 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_FILE)
+
+ 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["exclude"], r"\.pyi?$")
+ self.assertEqual(config["include"], r"\.py?$")
+
+ 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_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()
+ )
+ self.assertEqual(black.find_project_root((src_dir,)), src_dir.resolve())
+ self.assertEqual(black.find_project_root((src_python,)), src_dir.resolve())
+
+ def test_bpo_33660_workaround(self) -> None:
+ if system() == "Windows":
+ return
+
+ # https://bugs.python.org/issue33660
+
+ old_cwd = Path.cwd()
+ try:
+ root = Path("/")
+ os.chdir(str(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))
+
+
+with open(black.__file__, "r", encoding="utf-8") as _bf:
+ black_source_lines = _bf.readlines()
+
+
+def tracefunc(frame: types.FrameType, event: str, arg: Any) -> Callable:
+ """Show function calls `from black/__init__.py` as they happen.
+
+ Register this with `sys.settrace()` in a test you're debugging.
+ """
+ if event != "call":
+ return tracefunc
+
+ stack = len(inspect.stack()) - 19
+ stack *= 2
+ filename = frame.f_code.co_filename
+ lineno = frame.f_lineno
+ func_sig_lineno = lineno - 1
+ funcname = black_source_lines[func_sig_lineno].strip()
+ while funcname.startswith("@"):
+ func_sig_lineno += 1
+ funcname = black_source_lines[func_sig_lineno].strip()
+ if "black/__init__.py" in filename:
+ print(f"{' ' * stack}{lineno}:{funcname}")
+ return tracefunc
+
if __name__ == "__main__":
- unittest.main()
+ unittest.main(module="test_black")
projects / etc / vim.git / blobdiff