public virtual void TestToStringAndMultiAttributeImplementations()
{
AttributeSource src = new AttributeSource();
TermAttribute termAtt = (TermAttribute)src.AddAttribute(typeof(TermAttribute));
TypeAttribute typeAtt = (TypeAttribute)src.AddAttribute(typeof(TypeAttribute));
termAtt.SetTermBuffer("TestTerm");
typeAtt.SetType("TestType");
Assert.AreEqual("(" + termAtt.ToString() + "," + typeAtt.ToString() + ")", src.ToString(), "Attributes should appear in original order");
System.Collections.Generic.IEnumerator <AttributeImpl> it = src.GetAttributeImplsIterator().GetEnumerator();
Assert.IsTrue(it.MoveNext(), "Iterator should have 2 attributes left");
Assert.AreSame(termAtt, it.Current, "First AttributeImpl from iterator should be termAtt");
Assert.IsTrue(it.MoveNext(), "Iterator should have 1 attributes left");
Assert.AreSame(typeAtt, it.Current, "Second AttributeImpl from iterator should be typeAtt");
Assert.IsFalse(it.MoveNext(), "Iterator should have 0 attributes left");
src = new AttributeSource();
src.AddAttributeImpl(new Token());
// this should not add a new attribute as Token implements TermAttribute, too
termAtt = (TermAttribute)src.AddAttribute(typeof(TermAttribute));
Assert.IsTrue(termAtt is Token, "TermAttribute should be implemented by Token");
// get the Token attribute and check, that it is the only one
it = src.GetAttributeImplsIterator().GetEnumerator();
Assert.IsTrue(it.MoveNext());
Token tok = (Token)it.Current;
Assert.IsFalse(it.MoveNext(), "There should be only one attribute implementation instance");
termAtt.SetTermBuffer("TestTerm");
Assert.AreEqual("(" + tok.ToString() + ")", src.ToString(), "Token should only printed once");
}