def test_has_id(self):
element = Element("foo", attrib={'id': '1'})
self.assertTrue(has_id(element))
element = Element("foo", attrib={'id': 'bar'})
self.assertTrue(has_id(element))
def test_no_id(self):
element = Element("foo")
self.assertFalse(has_id(element))
def test_empty_id(self):
element = Element("foo", attrib={'id': ''})
self.assertFalse(has_id(element))
element = Element("foo", attrib={'id': ' '})
self.assertFalse(has_id(element))
def test_none(self):
self.assertFalse(has_id(None))
