public void Contains_Test_String_True()
{
var list = new DoubleCircularLinkedList <string> {
"a", "b", "c"
};
Assert.Equal(true, list.Contains("b"));
}
public void Contains_Test_True_Int()
{
var list = new DoubleCircularLinkedList <int> {
1, 2, 3
};
Assert.Equal(true, list.Contains(3));
}