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"""Tests for the FilenameOnly formatter object."""
import optparse
from flake8 import style_guide
from flake8.formatting import default
def options(**kwargs):
"""Create an optparse.Values instance."""
kwargs.setdefault('output_file', None)
kwargs.setdefault('tee', False)
return optparse.Values(kwargs)
def test_caches_filenames_already_printed():
"""Verify we cache filenames when we format them."""
formatter = default.FilenameOnly(options())
assert formatter.filenames_already_printed == set()
formatter.format(
style_guide.Violation('code', 'file.py', 1, 1, 'text', 'l'))
assert formatter.filenames_already_printed == {'file.py'}
def test_only_returns_a_string_once_from_format():
"""Verify format ignores the second error with the same filename."""
formatter = default.FilenameOnly(options())
error = style_guide.Violation('code', 'file.py', 1, 1, 'text', '1')
assert formatter.format(error) == 'file.py'
assert formatter.format(error) is None
def test_show_source_returns_nothing():
"""Verify show_source returns nothing."""
formatter = default.FilenameOnly(options())
error = style_guide.Violation('code', 'file.py', 1, 1, 'text', '1')
assert formatter.show_source(error) is None
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