'Make sure Tag Manager filters right for not blocked tags.'

def test_not_blocked(self):

    tag1 = Tag(tag_text='abc', blocked=False)
    tag1.save()
    tag2 = Tag(tag_text='swearword', blocked=True)
    tag2.save()
    eq_(Tag.objects.all().count(), 2)
    eq_(Tag.objects.not_blocked().count(), 1)
    eq_(Tag.objects.not_blocked()[0], tag1)
