public void TestNamedExtraElementsMemberConvention() {
var convention = new NamedExtraElementsMemberConvention("ExtraElements");
var extraElementsMemberName = convention.FindExtraElementsMember(typeof(TestClassA));
Assert.IsNotNull(extraElementsMemberName);
Assert.AreEqual("ExtraElements", extraElementsMemberName);
extraElementsMemberName = convention.FindExtraElementsMember(typeof(TestClassB));
Assert.IsNull(extraElementsMemberName);
}