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test_black.py
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test_black.py
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# -*- coding: utf-8 -*-
def test_help_message(testdir):
result = testdir.runpytest("--help")
result.stdout.fnmatch_lines(["*--black*enable format checking with black"])
def test_fail(testdir):
"""Assert test fails due to single quoted strings
"""
testdir.makepyfile(
"""
def hello():
print('Hello, world')
"""
)
result = testdir.runpytest("--black")
result.assert_outcomes(failed=1)
def test_pass(testdir):
"""Assert test passes when no formatting issues are found
"""
p = testdir.makepyfile(
"""
def hello():
print("Hello, world!")
"""
)
# replace trailing newline (stripped by testdir.makepyfile)
p = p.write(p.read() + "\n")
result = testdir.runpytest("--black")
result.assert_outcomes(passed=1)
def test_mtime_cache(testdir):
"""Assert test is skipped when file hasn't changed
"""
p = testdir.makepyfile(
"""
def hello():
print("Hello, world!")
"""
)
# replace trailing newline (stripped by testdir.makepyfile)
contents = p.read() + "\n"
p.write(contents)
# Test once to populate the cache
result = testdir.runpytest("--black")
result.assert_outcomes(passed=1)
# Run it again, it should be skipped
result = testdir.runpytest("--black", "-rs")
result.assert_outcomes(skipped=1)
result.stdout.fnmatch_lines(["SKIP*previously passed black format checks"])
# Update the file and test again.
p.write(contents)
result = testdir.runpytest("--black")
result.assert_outcomes(passed=1)
def test_exclude(testdir):
"""Assert test is skipped if path is excluded even if also included
"""
testdir.makefile(
"pyproject.toml",
"""
[tool.black]
include = 'test_exclude.py'
exclude = '.*'
""",
)
p = testdir.makepyfile(
"""
def hello():
print("Hello, world!")
"""
)
# replace trailing newline (stripped by testdir.makepyfile)
p = p.write(p.read() + "\n")
# Rename pyproject.toml ¯\_(ツ)_/¯
testdir.run("mv", "test_exclude.pyproject.toml", "pyproject.toml")
result = testdir.runpytest("--black")
result.assert_outcomes(skipped=1, passed=0)
def test_include(testdir):
"""Assert test is not skipped if path is included but not excluded
"""
testdir.makefile(
"pyproject.toml",
"""
[tool.black]
include = 'test_include'
""",
)
p = testdir.makepyfile(
"""
def hello():
print("Hello, world!")
"""
)
# replace trailing newline (stripped by testdir.makepyfile)
p = p.write(p.read() + "\n")
# Rename pyproject.toml ¯\_(ツ)_/¯
testdir.run("mv", "test_include.pyproject.toml", "pyproject.toml")
result = testdir.runpytest("--black")
result.assert_outcomes(skipped=0, passed=1)
def test_pytest_deprecation_warning(testdir):
"""Assert no deprecation warning is raised during test."""
p = testdir.makepyfile(
"""
def hello():
print("Hello, world!")
"""
)
# replace trailing newline (stripped by testdir.makepyfile)
p = p.write(p.read() + "\n")
result = testdir.runpytest("--black")
result.assert_outcomes(passed=1)
out = "\n".join(result.stdout.lines)
assert "PytestUnknownMarkWarning" not in out