ImageSharp/tests/ImageSharp.Tests/Processors/Samplers/AutoOrientTests.cs

// <copyright file="RotateFlipTest.cs" company="James Jackson-South">
// Copyright (c) James Jackson-South and contributors.
// Licensed under the Apache License, Version 2.0.
// </copyright>

namespace ImageSharp.Tests
{
    using System.IO;
    using Xunit;

    public class AutoOrientTests : FileTestBase
    {
        public static readonly TheoryData<RotateType, FlipType, ushort> OrientationValues
            = new TheoryData<RotateType, FlipType, ushort>
        {
            { RotateType.None,      FlipType.None,       0 },
            { RotateType.None,      FlipType.None,       1 },
            { RotateType.None,      FlipType.Horizontal, 2 },
            { RotateType.Rotate180, FlipType.None,       3 },
            { RotateType.Rotate180, FlipType.Horizontal, 4 },
            { RotateType.Rotate90,  FlipType.Horizontal, 5 },
            { RotateType.Rotate270, FlipType.None,       6 },
            { RotateType.Rotate90,  FlipType.Vertical,   7 },
            { RotateType.Rotate90,  FlipType.None,       8 },
        };

        [Theory]
        [MemberData("OrientationValues")]
        public void ImageShouldFlip(RotateType rotateType, FlipType flipType, ushort orientation)
        {
            string path = CreateOutputDirectory("AutoOrient");

            string file = TestImages.Bmp.F;

            using (FileStream stream = File.OpenRead(file))
            {
                string filename = Path.GetFileNameWithoutExtension(file) + "-" + orientation + Path.GetExtension(file);

                Image image = new Image(stream);
                image.ExifProfile = new ExifProfile();
                image.ExifProfile.SetValue(ExifTag.Orientation, orientation);

                using (FileStream before = File.OpenWrite($"{path}/before-{filename}"))
                {
                    using (FileStream after = File.OpenWrite($"{path}/after-{filename}"))
                    {
                        image.RotateFlip(rotateType, flipType)
                             .Save(before)
                             .AutoOrient()
                             .Save(after);
                    }
                }
            }
        }
    }
}