public void TestElementsEnumerator()
{
SimpleElement root = new SimpleElement();
IEnumerator child1Enum = root.GetElements("child1");
IXmlElement el1 = null;
Exception e = null;
try
{
el1 = (IXmlElement)child1Enum.Current; //without MoveNext()
}
catch (Exception ex)
{
e = ex;
}
Assert.IsNull(el1);
Assert.IsNotNull(e);
Assert.IsInstanceOf(typeof(InvalidOperationException), e);
el1 = root.AddElement("child1");
root.AddElement("child2");
root.AddElement("child3");
IXmlElement el2 = root.AddElement("child1");
root.AddElement("child2");
child1Enum = root.GetElements("child1");
Assert.IsTrue(child1Enum.MoveNext());
Assert.AreEqual(child1Enum.Current, el1);
Assert.IsTrue(child1Enum.MoveNext());
Assert.IsTrue(child1Enum.MoveNext()); //will do nothing
Assert.AreEqual(child1Enum.Current, el2);
Assert.IsFalse(child1Enum.MoveNext());
child1Enum.Reset();
Assert.IsTrue(child1Enum.MoveNext());
}
