public class SimpleLinkedListTests { [Fact] public void Empty_list_has_no_elements() { var list = new SimpleLinkedList(); Assert.Equal(0, list.Count); } [Fact(Skip = "Remove this Skip property to run this test")] public void Count_cannot_be_changed_from_the_outside() { var count = typeof(SimpleLinkedList<>).GetProperty("Count"); Assert.NotNull(count); Assert.True(count.GetGetMethod() is { IsPublic: true }); Assert.False(count.GetSetMethod(true) is { IsPublic: true }); } [Fact(Skip = "Remove this Skip property to run this test")] public void Pushing_elements_to_the_list_increases_the_count() { var list = new SimpleLinkedList(); list.Push(0); Assert.Equal(1, list.Count); list.Push(0); Assert.Equal(2, list.Count); } [Fact(Skip = "Remove this Skip property to run this test")] public void Popping_elements_from_the_list_decreases_the_count() { var list = new SimpleLinkedList(); list.Push(0); list.Push(0); Assert.Equal(2, list.Count); list.Pop(); Assert.Equal(1, list.Count); } [Fact(Skip = "Remove this Skip property to run this test")] public void Elements_pop_back_in_lifo_order() { var list = new SimpleLinkedList(); list.Push(3); list.Push(5); Assert.Equal(5, list.Pop()); list.Push(7); Assert.Equal(7, list.Pop()); Assert.Equal(3, list.Pop()); } private static SimpleLinkedList CreateSimpleLinkedList(int value) { var type = typeof(SimpleLinkedList<>).MakeGenericType(typeof(int)); var constructor = type.GetConstructor([typeof(int)]); return (SimpleLinkedList?)constructor?.Invoke([value]) ?? CreateSimpleLinkedList([value]); } private static SimpleLinkedList CreateSimpleLinkedList(params int[] values) { var type = typeof(SimpleLinkedList<>).MakeGenericType(typeof(int)); var constructor = type.GetConstructor([typeof(int[])]); Assert.NotNull(constructor); return (SimpleLinkedList)constructor.Invoke([values]); } [Fact(Skip = "Remove this Skip property to run this test")] public void Single_value_initialisation() { var list = CreateSimpleLinkedList(7); Assert.Equal(1, list.Count); Assert.Equal(7, list.Pop()); } [Fact(Skip = "Remove this Skip property to run this test")] public void Multi_value_initialisation() { var list = CreateSimpleLinkedList(2, 1, 3); Assert.Equal(3, list.Pop()); Assert.Equal(1, list.Pop()); Assert.Equal(2, list.Pop()); } [Fact(Skip = "Remove this Skip property to run this test")] public void From_enumerable() { var list = CreateSimpleLinkedList(new[] { 11, 7, 5, 3, 2 }); Assert.Equal(2, list.Pop()); Assert.Equal(3, list.Pop()); Assert.Equal(5, list.Pop()); Assert.Equal(7, list.Pop()); Assert.Equal(11, list.Pop()); } [Fact(Skip = "Remove this Skip property to run this test")] public void Reverse_enumerable() { var values = Enumerable.Range(1, 5).ToArray(); var list = CreateSimpleLinkedList(values); var enumerable = Assert.IsAssignableFrom>(list); var reversed = enumerable.Reverse(); Assert.Equal(values, reversed); } [Fact(Skip = "Remove this Skip property to run this test")] public void Roundtrip() { var values = Enumerable.Range(1, 7); var list = CreateSimpleLinkedList(values.ToArray()); var enumerable = Assert.IsAssignableFrom>(list); Assert.Equal(values.Reverse(), enumerable); } }