def test_get_attr_value():
t = Tag('<t n1=v1 n2=v2 n1=v3 n2=v4>c</t>')
assert t.get_attr('n1') == 'v3'
assert t.get_attr('n2') == 'v4'
t = Tag('<t a>c</t>')
assert t.get_attr('a') == ''
assert t.get_attr('z') is None
def test_get_attr_value(self):
t = Tag('<t n1=v1 n2=v2 n1=v3 n2=v4>c</t>')
self.assertEqual(t.get_attr('n1'), 'v3')
self.assertEqual(t.get_attr('n2'), 'v4')
t = Tag('<t a>c</t>')
self.assertEqual(t.get_attr('a'), '')
self.assertEqual(t.get_attr('z'), None)