#!/usr/bin/env python3
from functools import partial
+from io import StringIO
+import os
from pathlib import Path
+import sys
from typing import Any, List, Tuple
import unittest
from unittest.mock import patch
import black
ll = 88
-ff = partial(black.format_file, line_length=ll, fast=True)
+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'
+ 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'):
- name += '.py'
+ 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:
+ with open(THIS_DIR / name, "r", encoding="utf8") as test:
lines = test.readlines()
result = _input
for line in lines:
- if line.rstrip() == '# output':
+ line = line.replace(EMPTY_LINE, "")
+ if line.rstrip() == "# output":
result = _output
continue
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'
+ 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:
+ if actual != expected and not os.environ.get("SKIP_AST_PRINT"):
bdv: black.DebugVisitor[Any]
- black.out('Expected tree:', fg='green')
+ 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')
+ black.out("Actual tree:", fg="red")
try:
exp_node = black.lib2to3_parse(actual)
bdv = black.DebugVisitor()
@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")
actual = fs(source)
self.assertFormatEqual(expected, actual)
black.assert_equivalent(source, actual)
black.assert_stable(source, actual, line_length=ll)
- with self.assertRaises(black.NothingChanged):
- ff(THIS_FILE)
+ self.assertFalse(ff(THIS_FILE))
@patch("black.dump_to_file", dump_to_stderr)
def test_black(self) -> None:
- source, expected = read_data('../black')
+ source, expected = read_data("../black")
actual = fs(source)
self.assertFormatEqual(expected, actual)
black.assert_equivalent(source, actual)
black.assert_stable(source, actual, line_length=ll)
- with self.assertRaises(black.NothingChanged):
- ff(THIS_FILE)
+ 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)
+
+ def test_piping_diff(self) -> None:
+ 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
+ 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")
actual = fs(source)
self.assertFormatEqual(expected, actual)
black.assert_equivalent(source, actual)
black.assert_stable(source, actual, line_length=ll)
- with self.assertRaises(black.NothingChanged):
- ff(THIS_FILE)
+ self.assertFalse(ff(THIS_DIR / ".." / "setup.py"))
@patch("black.dump_to_file", dump_to_stderr)
def test_function(self) -> None:
- source, expected = read_data('function')
+ source, expected = read_data("function")
actual = fs(source)
self.assertFormatEqual(expected, actual)
black.assert_equivalent(source, actual)
@patch("black.dump_to_file", dump_to_stderr)
def test_expression(self) -> None:
- source, expected = read_data('expression')
+ source, expected = read_data("expression")
actual = fs(source)
self.assertFormatEqual(expected, actual)
black.assert_equivalent(source, actual)
black.assert_stable(source, actual, line_length=ll)
+ def test_expression_ff(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, encoding="utf8") as f:
+ actual = f.read()
+ finally:
+ os.unlink(tmp_file)
+ 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)
+
+ 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
+ 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>")
+ finally:
+ sys.stdout = hold_stdout
+ os.unlink(tmp_file)
+ 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}"
+ )
+ self.assertEqual(expected, actual, msg)
+
@patch("black.dump_to_file", dump_to_stderr)
def test_fstring(self) -> None:
- source, expected = read_data('fstring')
+ source, expected = read_data("fstring")
+ 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_string_quotes(self) -> None:
+ source, expected = read_data("string_quotes")
actual = fs(source)
self.assertFormatEqual(expected, actual)
black.assert_equivalent(source, actual)
@patch("black.dump_to_file", dump_to_stderr)
def test_comments(self) -> None:
- source, expected = read_data('comments')
+ source, expected = read_data("comments")
actual = fs(source)
self.assertFormatEqual(expected, actual)
black.assert_equivalent(source, actual)
@patch("black.dump_to_file", dump_to_stderr)
def test_comments2(self) -> None:
- source, expected = read_data('comments2')
+ source, expected = read_data("comments2")
+ 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_comments3(self) -> None:
+ source, expected = read_data("comments3")
+ 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_comments4(self) -> None:
+ source, expected = read_data("comments4")
actual = fs(source)
self.assertFormatEqual(expected, actual)
black.assert_equivalent(source, actual)
@patch("black.dump_to_file", dump_to_stderr)
def test_cantfit(self) -> None:
- source, expected = read_data('cantfit')
+ source, expected = read_data("cantfit")
actual = fs(source)
self.assertFormatEqual(expected, actual)
black.assert_equivalent(source, actual)
@patch("black.dump_to_file", dump_to_stderr)
def test_import_spacing(self) -> None:
- source, expected = read_data('import_spacing')
+ source, expected = read_data("import_spacing")
actual = fs(source)
self.assertFormatEqual(expected, actual)
black.assert_equivalent(source, actual)
@patch("black.dump_to_file", dump_to_stderr)
def test_composition(self) -> None:
- source, expected = read_data('composition')
+ source, expected = read_data("composition")
+ 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_empty_lines(self) -> None:
+ source, expected = read_data("empty_lines")
+ 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")
+ 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_fmtonoff(self) -> None:
+ source, expected = read_data("fmtonoff")
actual = fs(source)
self.assertFormatEqual(expected, actual)
black.assert_equivalent(source, actual)
err_lines.append(msg)
with patch("black.out", out), patch("black.err", err):
- report.done(Path('f1'), changed=False)
+ report.done(Path("f1"), changed=False)
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(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"), changed=True)
self.assertEqual(len(out_lines), 2)
self.assertEqual(len(err_lines), 0)
- self.assertEqual(out_lines[-1], 'reformatted f2')
+ self.assertEqual(out_lines[-1], "reformatted f2")
self.assertEqual(
- unstyle(str(report)), '1 file reformatted, 1 file left unchanged.'
+ unstyle(str(report)), "1 file reformatted, 1 file left unchanged."
)
+ self.assertEqual(report.return_code, 0)
+ report.check = True
self.assertEqual(report.return_code, 1)
- report.failed(Path('e1'), 'boom')
+ report.check = False
+ report.failed(Path("e1"), "boom")
self.assertEqual(len(out_lines), 2)
self.assertEqual(len(err_lines), 1)
- self.assertEqual(err_lines[-1], 'error: cannot format e1: boom')
+ 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, 1 file left unchanged, "
+ "1 file failed to reformat.",
)
self.assertEqual(report.return_code, 123)
- report.done(Path('f3'), changed=True)
+ report.done(Path("f3"), changed=True)
self.assertEqual(len(out_lines), 3)
self.assertEqual(len(err_lines), 1)
- self.assertEqual(out_lines[-1], 'reformatted f3')
+ 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, 1 file left unchanged, "
+ "1 file failed to reformat.",
)
self.assertEqual(report.return_code, 123)
- report.failed(Path('e2'), 'boom')
+ report.failed(Path("e2"), "boom")
self.assertEqual(len(out_lines), 3)
self.assertEqual(len(err_lines), 2)
- self.assertEqual(err_lines[-1], 'error: cannot format e2: boom')
+ 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, 1 file left unchanged, "
+ "2 files failed to reformat.",
)
self.assertEqual(report.return_code, 123)
- report.done(Path('f4'), changed=False)
+ report.done(Path("f4"), changed=False)
self.assertEqual(len(out_lines), 4)
self.assertEqual(len(err_lines), 2)
- self.assertEqual(out_lines[-1], 'f4 already well formatted, good job.')
+ 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, 2 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.",
+ )
def test_is_python36(self) -> None:
node = black.lib2to3_parse("def f(*, arg): ...\n")
self.assertTrue(black.is_python36(node))
node = black.lib2to3_parse("def f(*, arg): f'string'\n")
self.assertTrue(black.is_python36(node))
- source, expected = read_data('function')
+ source, expected = read_data("function")
node = black.lib2to3_parse(source)
self.assertTrue(black.is_python36(node))
node = black.lib2to3_parse(expected)
self.assertTrue(black.is_python36(node))
- source, expected = read_data('expression')
+ source, expected = read_data("expression")
node = black.lib2to3_parse(source)
self.assertFalse(black.is_python36(node))
node = black.lib2to3_parse(expected)
self.assertFalse(black.is_python36(node))
+ def test_debug_visitor(self) -> None:
+ source, _ = read_data("debug_visitor.py")
+ expected, _ = read_data("debug_visitor.out")
+ 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):
+ black.DebugVisitor.show(source)
+ actual = "\n".join(out_lines) + "\n"
+ log_name = ""
+ if expected != actual:
+ log_name = black.dump_to_file(*out_lines)
+ self.assertEqual(
+ expected,
+ actual,
+ f"AST print out is different. Actual version dumped to {log_name}",
+ )
+
+ def test_format_file_contents(self) -> None:
+ empty = ""
+ with self.assertRaises(black.NothingChanged):
+ black.format_file_contents(empty, line_length=ll, 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"
+ with self.assertRaises(black.NothingChanged):
+ black.format_file_contents(same, line_length=ll, fast=False)
+ different = "l = [1,2,3]"
+ expected = same
+ actual = black.format_file_contents(different, line_length=ll, 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)
+ self.assertEqual(str(e.exception), "Cannot parse: 1:7: return if you can")
+
+ def test_endmarker(self) -> None:
+ n = black.lib2to3_parse("\n")
+ self.assertEqual(n.type, black.syms.file_input)
+ self.assertEqual(len(n.children), 1)
+ self.assertEqual(n.children[0].type, black.token.ENDMARKER)
+
+ @unittest.skipIf(os.environ.get("SKIP_AST_PRINT"), "user set SKIP_AST_PRINT")
+ def test_assertFormatEqual(self) -> None:
+ 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):
+ with self.assertRaises(AssertionError):
+ self.assertFormatEqual("l = [1, 2, 3]", "l = [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), "")
+
-if __name__ == '__main__':
+if __name__ == "__main__":
unittest.main()
projects / etc / vim.git / blobdiff