public async Task ReadImageSizeTest()
{
await using var fileStream = ImageTestsHelper.OpenFileForReading(Path.Combine(ImageTestsHelper.JpegImagesDirectory, "1043-1200x900.jpg"));
var imageSize = _imageMetadataReader.ReadSize(fileStream);
Assert.Equal(1200, imageSize.Width);
Assert.Equal(900, imageSize.Height);
Assert.Equal(265504, imageSize.Bytes);
}
private async Task DetectionTest(string directory, ImageType expectedImageType)
{
foreach (var file in Directory.EnumerateFiles(directory))
{
await using var fileStream = ImageTestsHelper.OpenFileForReading(file);
var imageFormat = _imageMetadataReader.DetectFormat(fileStream);
Assert.Equal(expectedImageType, imageFormat.ImageType);
}
}
public async Task NotImageDetectionTest()
{
await using var fileStream = ImageTestsHelper.OpenFileForReading("textFile.txt");
var imageFormat = _imageMetadataReader.DetectFormat(fileStream);
Assert.Null(imageFormat);
var imageSize = _imageMetadataReader.ReadSize(fileStream);
Assert.Null(imageSize);
}
public async Task UnsupportedImageFormatTest()
{
await using var fileStream = ImageTestsHelper.OpenFileForReading("Images\\556-200x300.webp");
var imageFormat = _imageMetadataReader.DetectFormat(fileStream);
Assert.Null(imageFormat);
var imageSize = _imageMetadataReader.ReadSize(fileStream);
Assert.Null(imageSize);
}
private void ResizingTest(string directory)
{
var images = SelectImages(directory);
var originalImageStream = ImageTestsHelper.OpenFileForReading(images[0].FilePath);
for (int i = 1; i < images.Count; i++)
{
var imageResizingResult = _imageResizing.Resize(originalImageStream, ImageType.JPEG, images[i].Width);
Assert.Equal(images[i].Height, imageResizingResult.Size.Height);
}
}
