public void ListSourceGetItem()
{
tlog.Debug(tag, $"ListSourceGetItem START");
var para = new TestEnumerable();
var testingTarget = new ListSource(para);
Assert.IsNotNull(testingTarget, "should be not null");
Assert.IsInstanceOf <ListSource>(testingTarget, "should be an instance of testing target class!");
Assert.AreEqual(testingTarget.GetItem(0), 1, "The value of the first item of ListSouce should be 1.");
testingTarget.Dispose();
tlog.Debug(tag, $"ListSourceGetItem END (OK)");
}