def METHOD_NAME(self):
    resource_refs = SupportedResourceReferences()
    resource_refs.add("logicalId1", "property1", "value1")
    resource_refs.add("logicalId2", "property2", "value2")
    resource_refs.add("logicalId3", "property3", "value3")
    self.assertEqual({"property1": "value1"}, resource_refs.get_all("logicalId1"))
    self.assertEqual({"property2": "value2"}, resource_refs.get_all("logicalId2"))
    self.assertEqual({"property3": "value3"}, resource_refs.get_all("logicalId3"))