using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;
using Microsoft.VisualStudio.TestTools.UnitTesting;

namespace UnitTests.Common.Extensions
{
	[TestClass]
	[System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
	public class IPAddressExtensionsTests
	{
		[TestMethod]
		public void ShouldIncrementLastByte()
		{
			// arrange
			var ipAddress = IPAddress.Parse("192.168.178.22");

			// act
			var incremented = ipAddress.Increment();

			// assert
			Assert.AreEqual("192.168.178.23", incremented.ToString());
		}

		[TestMethod]
		public void ShouldIncrementAllBytes()
		{
			// arrange
			var ipAddress = IPAddress.Parse("192.255.255.255");

			// act
			var incremented = ipAddress.Increment();

			// assert
			Assert.AreEqual("193.0.0.0", incremented.ToString());
		}

		[TestMethod]
		public void ShouldDecrementLastByte()
		{
			// arrange
			var ipAddress = IPAddress.Parse("192.168.178.22");

			// act
			var decremented = ipAddress.Decrement();

			// assert
			Assert.AreEqual("192.168.178.21", decremented.ToString());
		}

		[TestMethod]
		public void ShouldDecrementAllBytes()
		{
			// arrange
			var ipAddress = IPAddress.Parse("192.0.0.0");

			// act
			var decremented = ipAddress.Decrement();

			// assert
			Assert.AreEqual("191.255.255.255", decremented.ToString());
		}
	}
}