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Tests for L{pyflakes.scripts.pyflakes}.
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from StringIO import StringIO
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from twisted.python.filepath import FilePath
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from twisted.trial.unittest import TestCase
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from pyflakes.scripts.pyflakes import checkPath
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def withStderrTo(stderr, f):
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Call C{f} with C{sys.stderr} redirected to C{stderr}.
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(outer, sys.stderr) = (sys.stderr, stderr)
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class CheckTests(TestCase):
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Tests for L{check} and L{checkPath} which check a file for flakes.
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def test_missingTrailingNewline(self):
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Source which doesn't end with a newline shouldn't cause any
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exception to be raised nor an error indicator to be returned by
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FilePath(fName).setContent("def foo():\n\tpass\n\t")
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self.assertFalse(checkPath(fName))
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def test_checkPathNonExisting(self):
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L{checkPath} handles non-existing files.
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count = withStderrTo(err, lambda: checkPath('extremo'))
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self.assertEquals(err.getvalue(), 'extremo: No such file or directory\n')
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self.assertEquals(count, 1)
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def test_multilineSyntaxError(self):
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Source which includes a syntax error which results in the raised
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L{SyntaxError.text} containing multiple lines of source are reported
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with only the last line of that source.
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# Sanity check - SyntaxError.text should be multiple lines, if it
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# isn't, something this test was unprepared for has happened.
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exc = self.assertRaises(SyntaxError, evaluate, source)
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self.assertTrue(exc.text.count('\n') > 1)
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sourcePath = FilePath(self.mktemp())
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sourcePath.setContent(source)
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count = withStderrTo(err, lambda: checkPath(sourcePath.path))
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self.assertEqual(count, 1)
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""" % (sourcePath.path,))
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def test_eofSyntaxError(self):
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The error reported for source files which end prematurely causing a
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syntax error reflects the cause for the syntax error.
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sourcePath = FilePath(self.mktemp())
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sourcePath.setContent(source)
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count = withStderrTo(err, lambda: checkPath(sourcePath.path))
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self.assertEqual(count, 1)
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%s:1: unexpected EOF while parsing
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""" % (sourcePath.path,))
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def test_nonDefaultFollowsDefaultSyntaxError(self):
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Source which has a non-default argument following a default argument
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should include the line number of the syntax error. However these
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exceptions do not include an offset.
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def foo(bar=baz, bax):
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sourcePath = FilePath(self.mktemp())
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sourcePath.setContent(source)
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count = withStderrTo(err, lambda: checkPath(sourcePath.path))
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self.assertEqual(count, 1)
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%s:1: non-default argument follows default argument
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def foo(bar=baz, bax):
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""" % (sourcePath.path,))
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def test_nonKeywordAfterKeywordSyntaxError(self):
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Source which has a non-keyword argument after a keyword argument should
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include the line number of the syntax error. However these exceptions
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do not include an offset.
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sourcePath = FilePath(self.mktemp())
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sourcePath.setContent(source)
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count = withStderrTo(err, lambda: checkPath(sourcePath.path))
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self.assertEqual(count, 1)
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%s:1: non-keyword arg after keyword arg
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""" % (sourcePath.path,))
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def test_permissionDenied(self):
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If the a source file is not readable, this is reported on standard
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sourcePath = FilePath(self.mktemp())
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sourcePath.setContent('')
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count = withStderrTo(err, lambda: checkPath(sourcePath.path))
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self.assertEquals(count, 1)
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err.getvalue(), "%s: Permission denied\n" % (sourcePath.path,))
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def test_misencodedFile(self):
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If a source file contains bytes which cannot be decoded, this is
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sourcePath = FilePath(self.mktemp())
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sourcePath.setContent(source)
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count = withStderrTo(err, lambda: checkPath(sourcePath.path))
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self.assertEquals(count, 1)
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err.getvalue(), "%s: problem decoding source\n" % (sourcePath.path,))
added
removed
pyflakes/test/test_script.py
