def testRemoveAttributeRemovesAttribute(self):
        doc = dougrain.Document.empty()
        doc.set_property('foo', "bar")

        doc.delete_property('foo')

        self.assertFalse(hasattr(doc, 'foo'))
        self.assertFalse(doc.properties in 'foo')
dataset/ETHPy150Open wharris/dougrain/test/test_document.py/AttributeMutationTests.testRemoveAttributeRemovesAttribute/swapped operands of `in`