def METHOD_NAME():
    mapping = {
        "http://somewhere.org/resources/foo": "foo",
        "http://somewhere.org/resources/bar": "bar",
    }
    proxy1 = ResourceMappingProxy(mapping)
    proxy2 = ResourceMappingProxy(mapping, package_name="foo", package_version="1.2.3")
    assert proxy1 == proxy2
    assert hash(proxy1) == hash(proxy2)
    assert proxy1 != mapping
    assert proxy2 != mapping