#!/usr/bin/env python3
+import asyncio
+from concurrent.futures import ThreadPoolExecutor
+from contextlib import contextmanager
from functools import partial
-from io import StringIO
+from io import BytesIO, TextIOWrapper
import os
from pathlib import Path
+import re
import sys
-from typing import Any, List, Tuple
+from tempfile import TemporaryDirectory
+from typing import Any, BinaryIO, Generator, List, Tuple, Iterator
import unittest
-from unittest.mock import patch
+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", ".out", ".diff")):
+ 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:
return "".join(_input).strip() + "\n", "".join(_output).strip() + "\n"
+@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(close: bool) -> Iterator[None]:
+ policy = asyncio.get_event_loop_policy()
+ old_loop = policy.get_event_loop()
+ loop = policy.new_event_loop()
+ asyncio.set_event_loop(loop)
+ try:
+ yield
+
+ finally:
+ policy.set_event_loop(old_loop)
+ if close:
+ 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, 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()
- 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=source
+ )
+ 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, 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"
+ stderrbuf = BytesIO()
+ args = ["-", "--fast", f"--line-length={ll}", "--diff", f"--config={config}"]
+ result = BlackRunner(stderrbuf).invoke(black.main, args, input=source)
+ 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)
black.assert_equivalent(source, actual)
black.assert_stable(source, actual, line_length=ll)
+ @patch("black.dump_to_file", dump_to_stderr)
+ def test_function2(self) -> None:
+ source, expected = read_data("function2")
+ 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_expression(self) -> None:
source, expected = read_data("expression")
tmp_file = Path(black.dump_to_file(source))
try:
self.assertTrue(ff(tmp_file, write_back=black.WriteBack.YES))
- with open(tmp_file) as f:
+ with open(tmp_file, encoding="utf8") as f:
actual = f.read()
finally:
os.unlink(tmp_file)
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 = 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(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
- self.assertEqual(expected, actual)
+ 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}"
+ )
+ self.assertEqual(expected, actual, msg)
@patch("black.dump_to_file", dump_to_stderr)
def test_fstring(self) -> None:
self.assertFormatEqual(expected, actual)
black.assert_equivalent(source, actual)
black.assert_stable(source, actual, line_length=ll)
+ mode = black.FileMode.NO_STRING_NORMALIZATION
+ not_normalized = fs(source, mode=mode)
+ self.assertFormatEqual(source, not_normalized)
+ black.assert_equivalent(source, not_normalized)
+ black.assert_stable(source, not_normalized, line_length=ll, mode=mode)
+
+ @patch("black.dump_to_file", dump_to_stderr)
+ def test_slices(self) -> None:
+ source, expected = read_data("slices")
+ 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_comments(self) -> None:
black.assert_equivalent(source, actual)
black.assert_stable(source, actual, line_length=ll)
+ @patch("black.dump_to_file", dump_to_stderr)
+ def test_comments5(self) -> None:
+ source, expected = read_data("comments5")
+ 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_cantfit(self) -> None:
source, expected = read_data("cantfit")
black.assert_equivalent(source, actual)
black.assert_stable(source, actual, line_length=ll)
+ @patch("black.dump_to_file", dump_to_stderr)
+ def test_string_prefixes(self) -> None:
+ source, expected = read_data("string_prefixes")
+ 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_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_python2_unicode_literals(self) -> None:
+ source, expected = read_data("python2_unicode_literals")
+ 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_stub(self) -> None:
+ mode = black.FileMode.PYI
+ source, expected = read_data("stub.pyi")
+ actual = fs(source, mode=mode)
+ self.assertFormatEqual(expected, actual)
+ black.assert_stable(source, actual, line_length=ll, mode=mode)
+
@patch("black.dump_to_file", dump_to_stderr)
def test_fmtonoff(self) -> None:
source, expected = read_data("fmtonoff")
black.assert_equivalent(source, actual)
black.assert_stable(source, actual, line_length=ll)
- def test_report(self) -> None:
- report = black.Report()
+ @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")
+ 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_new_line_between_class_and_code(self) -> None:
+ source, expected = read_data("class_methods_new_line")
+ actual = fs(source)
+ self.assertFormatEqual(expected, actual)
+ black.assert_equivalent(source, actual)
+ black.assert_stable(source, actual, line_length=ll)
+
+ 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 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, "
+ "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 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, 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.",
+ )
+
+ 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, 2 files would be left unchanged, "
+ "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, 3 files would be left unchanged, "
"2 files would fail to reformat.",
)
node = black.lib2to3_parse(expected)
self.assertFalse(black.is_python36(node))
+ 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")
expected, _ = read_data("debug_visitor.out")
self.assertTrue("Actual tree:" in out_str)
self.assertEqual("".join(err_lines), "")
+ def test_cache_broken_file(self) -> None:
+ mode = black.FileMode.AUTO_DETECT
+ with cache_dir() as workspace:
+ cache_file = black.get_cache_file(black.DEFAULT_LINE_LENGTH, mode)
+ with cache_file.open("w") as fobj:
+ fobj.write("this is not a pickle")
+ self.assertEqual(black.read_cache(black.DEFAULT_LINE_LENGTH, mode), {})
+ src = (workspace / "test.py").resolve()
+ with src.open("w") as fobj:
+ fobj.write("print('hello')")
+ result = CliRunner().invoke(black.main, [str(src)])
+ self.assertEqual(result.exit_code, 0)
+ cache = black.read_cache(black.DEFAULT_LINE_LENGTH, mode)
+ self.assertIn(src, cache)
+
+ def test_cache_single_file_already_cached(self) -> None:
+ mode = black.FileMode.AUTO_DETECT
+ with cache_dir() as workspace:
+ src = (workspace / "test.py").resolve()
+ with src.open("w") as fobj:
+ fobj.write("print('hello')")
+ black.write_cache({}, [src], black.DEFAULT_LINE_LENGTH, mode)
+ result = CliRunner().invoke(black.main, [str(src)])
+ self.assertEqual(result.exit_code, 0)
+ with src.open("r") as fobj:
+ self.assertEqual(fobj.read(), "print('hello')")
+
+ @event_loop(close=False)
+ def test_cache_multiple_files(self) -> None:
+ mode = black.FileMode.AUTO_DETECT
+ 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], black.DEFAULT_LINE_LENGTH, mode)
+ result = CliRunner().invoke(black.main, [str(workspace)])
+ self.assertEqual(result.exit_code, 0)
+ 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(black.DEFAULT_LINE_LENGTH, mode)
+ self.assertIn(one, cache)
+ self.assertIn(two, cache)
+
+ def test_no_cache_when_writeback_diff(self) -> None:
+ mode = black.FileMode.AUTO_DETECT
+ with cache_dir() as workspace:
+ src = (workspace / "test.py").resolve()
+ with src.open("w") as fobj:
+ fobj.write("print('hello')")
+ result = CliRunner().invoke(black.main, [str(src), "--diff"])
+ self.assertEqual(result.exit_code, 0)
+ cache_file = black.get_cache_file(black.DEFAULT_LINE_LENGTH, mode)
+ self.assertFalse(cache_file.exists())
+
+ def test_no_cache_when_stdin(self) -> None:
+ mode = black.FileMode.AUTO_DETECT
+ with cache_dir():
+ result = CliRunner().invoke(black.main, ["-"], input="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_read_cache_no_cachefile(self) -> None:
+ mode = black.FileMode.AUTO_DETECT
+ with cache_dir():
+ self.assertEqual(black.read_cache(black.DEFAULT_LINE_LENGTH, mode), {})
+
+ def test_write_cache_read_cache(self) -> None:
+ mode = black.FileMode.AUTO_DETECT
+ with cache_dir() as workspace:
+ src = (workspace / "test.py").resolve()
+ src.touch()
+ black.write_cache({}, [src], black.DEFAULT_LINE_LENGTH, mode)
+ cache = black.read_cache(black.DEFAULT_LINE_LENGTH, 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 = black.FileMode.AUTO_DETECT
+ with cache_dir(exists=False) as workspace:
+ self.assertFalse(workspace.exists())
+ black.write_cache({}, [], black.DEFAULT_LINE_LENGTH, mode)
+ self.assertTrue(workspace.exists())
+
+ @event_loop(close=False)
+ def test_failed_formatting_does_not_get_cached(self) -> None:
+ mode = black.FileMode.AUTO_DETECT
+ 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')
+ result = CliRunner().invoke(black.main, [str(workspace)])
+ self.assertEqual(result.exit_code, 123)
+ cache = black.read_cache(black.DEFAULT_LINE_LENGTH, mode)
+ self.assertNotIn(failing, cache)
+ self.assertIn(clean, cache)
+
+ def test_write_cache_write_fail(self) -> None:
+ mode = black.FileMode.AUTO_DETECT
+ with cache_dir(), patch.object(Path, "open") as mock:
+ mock.side_effect = OSError
+ black.write_cache({}, [], black.DEFAULT_LINE_LENGTH, mode)
+
+ @event_loop(close=False)
+ def test_check_diff_use_together(self) -> None:
+ with cache_dir():
+ # Files which will be reformatted.
+ src1 = (THIS_DIR / "data" / "string_quotes.py").resolve()
+ result = CliRunner().invoke(black.main, [str(src1), "--diff", "--check"])
+ self.assertEqual(result.exit_code, 1, result.output)
+ # Files which will not be reformatted.
+ src2 = (THIS_DIR / "data" / "composition.py").resolve()
+ result = CliRunner().invoke(black.main, [str(src2), "--diff", "--check"])
+ self.assertEqual(result.exit_code, 0, result.output)
+ # Multi file command.
+ result = CliRunner().invoke(
+ black.main, [str(src1), str(src2), "--diff", "--check"]
+ )
+ self.assertEqual(result.exit_code, 1, result.output)
+
+ def test_no_files(self) -> None:
+ with cache_dir():
+ # Without an argument, black exits with error code 0.
+ result = CliRunner().invoke(black.main, [])
+ self.assertEqual(result.exit_code, 0)
+
+ 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}")
+ result = CliRunner().invoke(black.main, [str(workspace.resolve())])
+ self.assertEqual(result.exit_code, 0)
+
+ def test_read_cache_line_lengths(self) -> None:
+ mode = black.FileMode.AUTO_DETECT
+ with cache_dir() as workspace:
+ path = (workspace / "file.py").resolve()
+ path.touch()
+ black.write_cache({}, [path], 1, mode)
+ one = black.read_cache(1, mode)
+ self.assertIn(path, one)
+ two = black.read_cache(2, mode)
+ self.assertNotIn(path, two)
+
+ def test_single_file_force_pyi(self) -> None:
+ reg_mode = black.FileMode.AUTO_DETECT
+ pyi_mode = black.FileMode.PYI
+ 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)
+ result = CliRunner().invoke(black.main, [str(path), "--pyi"])
+ self.assertEqual(result.exit_code, 0)
+ with open(path, "r") as fh:
+ actual = fh.read()
+ # verify cache with --pyi is separate
+ pyi_cache = black.read_cache(black.DEFAULT_LINE_LENGTH, pyi_mode)
+ self.assertIn(path, pyi_cache)
+ normal_cache = black.read_cache(black.DEFAULT_LINE_LENGTH, reg_mode)
+ self.assertNotIn(path, normal_cache)
+ self.assertEqual(actual, expected)
+
+ @event_loop(close=False)
+ def test_multi_file_force_pyi(self) -> None:
+ reg_mode = black.FileMode.AUTO_DETECT
+ pyi_mode = black.FileMode.PYI
+ 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)
+ result = CliRunner().invoke(black.main, [str(p) for p in paths] + ["--pyi"])
+ self.assertEqual(result.exit_code, 0)
+ 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(black.DEFAULT_LINE_LENGTH, pyi_mode)
+ normal_cache = black.read_cache(black.DEFAULT_LINE_LENGTH, 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=source)
+ self.assertEqual(result.exit_code, 0)
+ actual = result.output
+ self.assertFormatEqual(actual, expected)
+
+ def test_single_file_force_py36(self) -> None:
+ reg_mode = black.FileMode.AUTO_DETECT
+ py36_mode = black.FileMode.PYTHON36
+ 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)
+ result = CliRunner().invoke(black.main, [str(path), "--py36"])
+ self.assertEqual(result.exit_code, 0)
+ with open(path, "r") as fh:
+ actual = fh.read()
+ # verify cache with --py36 is separate
+ py36_cache = black.read_cache(black.DEFAULT_LINE_LENGTH, py36_mode)
+ self.assertIn(path, py36_cache)
+ normal_cache = black.read_cache(black.DEFAULT_LINE_LENGTH, reg_mode)
+ self.assertNotIn(path, normal_cache)
+ self.assertEqual(actual, expected)
+
+ @event_loop(close=False)
+ def test_multi_file_force_py36(self) -> None:
+ reg_mode = black.FileMode.AUTO_DETECT
+ py36_mode = black.FileMode.PYTHON36
+ 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)
+ result = CliRunner().invoke(
+ black.main, [str(p) for p in paths] + ["--py36"]
+ )
+ self.assertEqual(result.exit_code, 0)
+ for path in paths:
+ with open(path, "r") as fh:
+ actual = fh.read()
+ self.assertEqual(actual, expected)
+ # verify cache with --py36 is separate
+ pyi_cache = black.read_cache(black.DEFAULT_LINE_LENGTH, py36_mode)
+ normal_cache = black.read_cache(black.DEFAULT_LINE_LENGTH, 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", "--py36"], input=source)
+ 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()
+ 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_in_dir(path, this_abs, include, exclude, report)
+ )
+ self.assertEqual(sorted(expected), sorted(sources))
+
+ def test_empty_include(self) -> None:
+ path = THIS_DIR / "data" / "include_exclude_tests"
+ report = black.Report()
+ 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_in_dir(
+ path, this_abs, empty, re.compile(black.DEFAULT_EXCLUDES), report
+ )
+ )
+ self.assertEqual(sorted(expected), sorted(sources))
+
+ def test_empty_exclude(self) -> None:
+ path = THIS_DIR / "data" / "include_exclude_tests"
+ report = black.Report()
+ 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_in_dir(
+ path, this_abs, re.compile(black.DEFAULT_INCLUDES), empty, report
+ )
+ )
+ self.assertEqual(sorted(expected), sorted(sources))
+
+ def test_invalid_include_exclude(self) -> None:
+ for option in ["--include", "--exclude"]:
+ result = CliRunner().invoke(black.main, ["-", option, "**()(!!*)"])
+ self.assertEqual(result.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) # type: ignore
+ if nl == "\n":
+ self.assertNotIn(b"\r\n", updated_contents) # type: ignore
+
+ 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