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# Copyright (c) 2001-2010 Twisted Matrix Laboratories. # See LICENSE for details.
""" Tests for L{twisted.web.util}. """
from twisted.trial.unittest import TestCase from twisted.web.util import _hasSubstring
class HasSubstringTestCase(TestCase): """ Test regular expression-based substring searching. """
def test_hasSubstring(self): """ L{_hasSubstring} returns True if the specified substring is present in the text being searched. """ self.assertTrue(_hasSubstring("foo", "<foo>"))
def test_hasSubstringWithoutMatch(self): """ L{_hasSubstring} returns False if the specified substring is not present in the text being searched. """ self.assertFalse(_hasSubstring("foo", "<bar>"))
def test_hasSubstringOnlyMatchesStringsWithNonAlphnumericNeighbors(self): """ L{_hasSubstring} returns False if the specified substring is present in the text being searched but the characters surrounding the substring are alphanumeric. """ self.assertFalse(_hasSubstring("foo", "barfoobaz")) self.assertFalse(_hasSubstring("foo", "1foo2"))
def test_hasSubstringEscapesKey(self): """ L{_hasSubstring} uses a regular expression to determine if a substring exists in a text snippet. The substring is escaped to ensure that it doesn't interfere with the regular expression. """ self.assertTrue(_hasSubstring("[b-a]", "Python can generate names like [b-a]."))
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