def METHOD_NAME(self, cfngin_context: MockCFNginContext) -> None:
    """Test init default values."""
    account_id = "123456789012"
    sts_stubber = cfngin_context.add_stubber("sts")
    sts_stubber.add_response(
        "get_caller_identity",
        {
            "UserId": "str",
            "Account": account_id,
            "Arn": "arn:aws:iam:::user/test-user",
        },
    )
    with sts_stubber:
        obj = ElasticContainerRegistry(context=cfngin_context)
    sts_stubber.assert_no_pending_responses()
    assert obj.account_id == account_id
    assert obj.alias is None
    assert obj.region == cfngin_context.env.aws_region
    assert not obj.public