#include "pch.h"
#include "CppUnitTest.h"
#include "SinglyLinkedList.hpp"
using namespace Microsoft::VisualStudio::CppUnitTestFramework;

namespace LinkedListUnitTests
{
	TEST_CLASS(LinkedListUnitTests)
	{
	public:
		
		TEST_METHOD(EmptyListHasZeroSize)
		{
			SinglyLinkedList<int> LinkedList{};
			Assert::AreEqual(0ull, LinkedList._size);
		}

		TEST_METHOD(AppendingLinkedListWith1Item)
		{
			SinglyLinkedList<int> LinkedList{};
			ListNode<int>* node = new ListNode<int>{ 5, nullptr };
			

			bool Success = Append(&LinkedList, node);
			Assert::AreEqual(5, LinkedList._head->_data);
			delete node;
		}
		TEST_METHOD(AppendingLinkedListWith5Items)
		{
			SinglyLinkedList<int> LinkedList{};
			ListNode<int>* node = new ListNode<int>{ 5, nullptr };
			Append(&LinkedList, node);
			Append(&LinkedList, node);
			Append(&LinkedList, node);
			Append(&LinkedList, node);
			Append(&LinkedList, node);

			Assert::AreEqual(5, LinkedList._head->_next->_next->_next->_next->_data);
			delete node;
		}

		TEST_METHOD(DeleteFirstLinkWith0)
		{
			SinglyLinkedList<int> LinkedList{};
			ListNode<int>* node = new ListNode<int>{};
			bool Success = RemoveFirst(&LinkedList, node);
			Assert::AreEqual(1, static_cast<int>(Success));
			delete node;
		}
	};
}