public void TestContentTypeDetection()
{
var pngBytes = Convert.FromBase64String("iVBORw0KGgoAAAANSUhEUgAAAAEAAAABAQMAAAAl21bKAAAAA1BMVEX/TQBcNTh/AAAAAXRSTlPM0jRW/QAAAApJREFUeJxjYgAAAAYAAzY3fKgAAAAASUVORK5CYII=");
Assert.Equal("image/png", ImageJob.GetContentTypeForBytes(pngBytes));
Assert.True(ImageJob.CanDecodeBytes(pngBytes));
var jpegBytes = new byte[] { 0xFF, 0xD8, 0xFF, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
Assert.Equal("image/jpeg", ImageJob.GetContentTypeForBytes(jpegBytes));
Assert.True(ImageJob.CanDecodeBytes(jpegBytes));
var gifBytes = new byte[] { (byte)'G', (byte)'I', (byte)'F', (byte)'8', (byte)'9', (byte)'a', 0, 0, 0, 0, 0, 0, 0 };
Assert.Equal("image/gif", ImageJob.GetContentTypeForBytes(gifBytes));
Assert.True(ImageJob.CanDecodeBytes(gifBytes));
var webpBytes = new byte[] { (byte)'R', (byte)'I', (byte)'F', (byte)'F', 0, 0, 0, 0, (byte)'W', (byte)'E', (byte)'B', (byte)'P' };
Assert.Equal("image/webp", ImageJob.GetContentTypeForBytes(webpBytes));
Assert.True(ImageJob.CanDecodeBytes(webpBytes));
var nonsenseBytes = new byte[] { (byte)'A', (byte)'B', (byte)'C', (byte)'D', (byte)'E', (byte)'F', 0, 0, 0, 0, 0, 0, 0 };
Assert.Equal(null, ImageJob.GetContentTypeForBytes(nonsenseBytes));
Assert.False(ImageJob.CanDecodeBytes(nonsenseBytes));
}