self.assertEqual(fmt(3,6), '4,6')

self.assertEqual(fmt(0,0), '0')

class TestJunkAPIs(unittest.TestCase):

def test_is_line_junk_true(self):

for line in ['#', ' ', ' #', '# ', ' # ', '']:

self.assertTrue(difflib.IS_LINE_JUNK(line), repr(line))

def test_is_line_junk_false(self):

for line in ['##', ' ##', '## ', 'abc ', 'abc #', 'Mr. Moose is up!']:

self.assertFalse(difflib.IS_LINE_JUNK(line), repr(line))

def test_is_line_junk_REDOS(self):

evil_input = ('\t' * 1000000) + '##'

self.assertFalse(difflib.IS_LINE_JUNK(evil_input))

def test_is_character_junk_true(self):

for char in [' ', '\t']:

self.assertTrue(difflib.IS_CHARACTER_JUNK(char), repr(char))

def test_is_character_junk_false(self):

for char in ['a', '#', '\n', '\f', '\r', '\v']:

self.assertFalse(difflib.IS_CHARACTER_JUNK(char), repr(char))

def test_main():

difflib.HtmlDiff._default_prefix = 0

Doctests = doctest.DocTestSuite(difflib)

run_unittest(

TestWithAscii, TestAutojunk, TestSFpatches, TestSFbugs,

TestOutputFormat, Doctests)

TestOutputFormat, TestJunkAPIs)

if __name__ == '__main__':

test_main()