//-------------------------------------------------------------------------
public virtual void test_attributes()
{
assertEquals(sut2().getAttribute(AttributeType.NAME), "NAME");
assertEquals(sut2().findAttribute(AttributeType.NAME).get(), "NAME");
assertThrows(typeof(System.ArgumentException), () => sut2().getAttribute(AttributeType.of("Foo")));
EtdContractSpec updated = sut2().withAttribute(AttributeType.NAME, "FOO");
assertEquals(updated.getAttribute(AttributeType.NAME), "FOO");
}