def test_subject_is_valid(self):
subject = subject_filter("valid subject")
self.assertEqual(subject, "valid subject")
def test_subject_is_none(self):
subject = subject_filter(None)
self.assertEqual(subject, "[no subject]")
def test_subject_is_white_spaces(self):
subject = subject_filter(" ")
self.assertEqual(subject, "[no subject]")
def test_subject_is_empty(self):
subject = subject_filter("")
self.assertEqual(subject, "[no subject]")
def test_subject_is_valid(self):
subject = subject_filter('valid subject')
self.assertEqual(subject, 'valid subject')
def test_subject_is_white_spaces(self):
subject = subject_filter(' ')
self.assertEqual(subject, '[no subject]')
def test_subject_is_empty(self):
subject = subject_filter('')
self.assertEqual(subject, '[no subject]')