using System.IO;
using AMWD.Common.Compression;

namespace AMWD.Common.Tests.Compression
{
	[TestClass]
	public class ArchiveFileTest
	{
		[TestMethod]
		public void ShouldSetCorrectPermissionsFromOctal()
		{
			// Arrange
			var expected = UnixFileMode.UserRead | UnixFileMode.UserWrite | UnixFileMode.UserExecute
				| UnixFileMode.GroupRead | UnixFileMode.GroupExecute
				| UnixFileMode.OtherRead | UnixFileMode.OtherExecute;
			var file = new ArchiveFile();

			// Act
			file.SetPermissions("0755");

			// Assert
			Assert.AreEqual(expected, file.Permissions);
		}

		[TestMethod]
		public void ShouldSetCorrectPermissionsFromDecimal()
		{
			// Arrange
			var expected = UnixFileMode.UserRead | UnixFileMode.UserWrite | UnixFileMode.UserExecute
				| UnixFileMode.GroupRead | UnixFileMode.GroupExecute
				| UnixFileMode.OtherRead | UnixFileMode.OtherExecute;
			var file = new ArchiveFile();

			// Act
			file.SetPermissions(493); // decimal for octal 0755

			// Assert
			Assert.AreEqual(expected, file.Permissions);
		}

		[TestMethod]
		public void ShouldSetPermissionsWithSpecialFlags()
		{
			// Arrange
			var expected = UnixFileMode.SetUser
				| UnixFileMode.UserRead | UnixFileMode.UserWrite | UnixFileMode.UserExecute
				| UnixFileMode.GroupRead | UnixFileMode.GroupExecute
				| UnixFileMode.OtherRead | UnixFileMode.OtherExecute;
			var file = new ArchiveFile();

			// Act
			file.SetPermissions("4755"); // setuid + 0755

			// Assert
			Assert.AreEqual(expected, file.Permissions);
		}

		[TestMethod]
		public void ShouldIgnoreHighBytePermissions()
		{
			// Arrange
			int input = (1 << 20) | 493;
			var expected = UnixFileMode.UserRead | UnixFileMode.UserWrite | UnixFileMode.UserExecute
				| UnixFileMode.GroupRead | UnixFileMode.GroupExecute
				| UnixFileMode.OtherRead | UnixFileMode.OtherExecute;
			var file = new ArchiveFile();

			// Act
			file.SetPermissions(input);

			// Assert
			Assert.AreEqual(expected, file.Permissions);
		}
	}
}