public void ListSourceContains()
{
tlog.Debug(tag, $"ListSourceContains 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!");
var ret = testingTarget.Contains(3);
Assert.IsTrue(ret, "The ListSouce should contain 3.");
testingTarget.Dispose();
tlog.Debug(tag, $"ListSourceContains END (OK)");
}