public void BinaryTree_LevelOrder_Should_Pass() { var root = this.CreateTestTree(); var t = new BinaryTree <int>(root); var result = t.Traverse(TraverseType.LevelOrder); result.Should().NotBeNull("result should not be null."); result.Count.Should().Be(7, "Incorrect number of items in result."); List <int> expected = new List <int> { 1, 2, 3, 4, 5, 6, 7 }; for (int i = 0; i < 7; i++) { result[i].Should().Be(expected[i], "Incorrect result at position {0}", i); } }