using AMWD.Common.Comparer;

namespace AMWD.Common.Tests.Comparer
{
	[TestClass]
	public class VersionStringComparerTest
	{
		[TestMethod]
		[DataRow(null, "0")]
		[DataRow("", "0")]
		[DataRow("0", "1")]
		[DataRow("1.0", "1.1")]
		[DataRow("1.0.0", "1.0.1")]
		[DataRow("1.0.0.0", "1.0.0.1")]
		[DataRow("1.0.0.0-RC1", "1.0.0.0-RC2")]
		public void ShouldBeLessThan(string x, string y)
		{
			// Arrange
			var comparer = new VersionStringComparer();

			// Act
			int result = comparer.Compare(x, y);

			// Assert
			Assert.AreEqual(-1, result);
		}

		[TestMethod]
		[DataRow("0", null)]
		[DataRow("0", "")]
		[DataRow("1", "0")]
		[DataRow("1.1", "1.0")]
		[DataRow("1.0.1", "1.0.0")]
		[DataRow("1.0.0.1", "1.0.0.0")]
		[DataRow("1.0.0.0-RC2", "1.0.0.0-RC1")]
		public void ShouldBeGreaterThan(string x, string y)
		{
			// Arrange
			var comparer = new VersionStringComparer();

			// Act
			int result = comparer.Compare(x, y);

			// Assert
			Assert.AreEqual(1, result);
		}

		[TestMethod]
		[DataRow(null, null)]
		[DataRow("", "")]
		[DataRow("1", "1")]
		[DataRow("1.2.3", "1.2.3")]
		[DataRow("1.2.3-alpha", "1.2.3-alpha")]
		public void ShouldBeEqual(string x, string y)
		{
			// Arrange
			var comparer = new VersionStringComparer();

			// Act
			int result = comparer.Compare(x, y);

			// Assert
			Assert.AreEqual(0, result);
		}
	}
}