124 lines
5 KiB
C#
124 lines
5 KiB
C#
using System.IO;
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using System.Linq;
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using System.Text;
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using API.Entities.Enums;
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using API.Services;
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using NetVips;
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using Xunit;
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using Image = NetVips.Image;
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namespace API.Tests.Services;
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public class ImageServiceTests
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{
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private readonly string _testDirectory = Path.Join(Directory.GetCurrentDirectory(), "../../../Services/Test Data/ImageService/Covers");
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private const string OutputPattern = "_output";
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private const string BaselinePattern = "_baseline";
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/// <summary>
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/// Run this once to get the baseline generation
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/// </summary>
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[Fact]
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public void GenerateBaseline()
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{
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GenerateFiles(BaselinePattern);
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}
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/// <summary>
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/// Change the Scaling/Crop code then run this continuously
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/// </summary>
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[Fact]
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public void TestScaling()
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{
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GenerateFiles(OutputPattern);
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GenerateHtmlFile();
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}
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private void GenerateFiles(string outputExtension)
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{
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// Step 1: Delete any images that have _output in the name
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var outputFiles = Directory.GetFiles(_testDirectory, "*_output.*");
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foreach (var file in outputFiles)
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{
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File.Delete(file);
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}
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// Step 2: Scan the _testDirectory for images
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var imageFiles = Directory.GetFiles(_testDirectory, "*.*")
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.Where(file => !file.EndsWith("html"))
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.Where(file => !file.Contains(OutputPattern) && !file.Contains(BaselinePattern))
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.ToList();
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// Step 3: Process each image
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foreach (var imagePath in imageFiles)
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{
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var fileName = Path.GetFileNameWithoutExtension(imagePath);
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var dims = CoverImageSize.Default.GetDimensions();
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using var sourceImage = Image.NewFromFile(imagePath, false, Enums.Access.SequentialUnbuffered);
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var size = ImageService.GetSizeForDimensions(sourceImage, dims.Width, dims.Height);
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var crop = ImageService.GetCropForDimensions(sourceImage, dims.Width, dims.Height);
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using var thumbnail = Image.Thumbnail(imagePath, dims.Width, dims.Height,
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size: size,
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crop: crop);
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var outputFileName = fileName + outputExtension + ".png";
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thumbnail.WriteToFile(Path.Join(_testDirectory, outputFileName));
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}
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}
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private void GenerateHtmlFile()
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{
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var imageFiles = Directory.GetFiles(_testDirectory, "*.*")
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.Where(file => !file.EndsWith("html"))
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.Where(file => !file.Contains(OutputPattern) && !file.Contains(BaselinePattern))
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.ToList();
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var htmlBuilder = new StringBuilder();
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htmlBuilder.AppendLine("<!DOCTYPE html>");
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htmlBuilder.AppendLine("<html lang=\"en\">");
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htmlBuilder.AppendLine("<head>");
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htmlBuilder.AppendLine("<meta charset=\"UTF-8\">");
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htmlBuilder.AppendLine("<meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">");
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htmlBuilder.AppendLine("<title>Image Comparison</title>");
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htmlBuilder.AppendLine("<style>");
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htmlBuilder.AppendLine("body { font-family: Arial, sans-serif; }");
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htmlBuilder.AppendLine(".container { display: flex; flex-wrap: wrap; }");
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htmlBuilder.AppendLine(".image-row { display: flex; align-items: center; margin-bottom: 20px; width: 100% }");
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htmlBuilder.AppendLine(".image-row img { margin-right: 10px; max-width: 200px; height: auto; }");
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htmlBuilder.AppendLine("</style>");
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htmlBuilder.AppendLine("</head>");
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htmlBuilder.AppendLine("<body>");
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htmlBuilder.AppendLine("<div class=\"container\">");
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foreach (var imagePath in imageFiles)
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{
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var fileName = Path.GetFileNameWithoutExtension(imagePath);
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var baselinePath = Path.Combine(_testDirectory, fileName + "_baseline.png");
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var outputPath = Path.Combine(_testDirectory, fileName + "_output.png");
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var dims = CoverImageSize.Default.GetDimensions();
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using var sourceImage = Image.NewFromFile(imagePath, false, Enums.Access.SequentialUnbuffered);
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htmlBuilder.AppendLine("<div class=\"image-row\">");
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htmlBuilder.AppendLine($"<p>{fileName} ({((double) sourceImage.Width / sourceImage.Height).ToString("F2")}) - {ImageService.WillScaleWell(sourceImage, dims.Width, dims.Height)}</p>");
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htmlBuilder.AppendLine($"<img src=\"./{Path.GetFileName(imagePath)}\" alt=\"{fileName}\">");
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if (File.Exists(baselinePath))
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{
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htmlBuilder.AppendLine($"<img src=\"./{Path.GetFileName(baselinePath)}\" alt=\"{fileName} baseline\">");
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}
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if (File.Exists(outputPath))
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{
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htmlBuilder.AppendLine($"<img src=\"./{Path.GetFileName(outputPath)}\" alt=\"{fileName} output\">");
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}
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htmlBuilder.AppendLine("</div>");
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}
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htmlBuilder.AppendLine("</div>");
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htmlBuilder.AppendLine("</body>");
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htmlBuilder.AppendLine("</html>");
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File.WriteAllText(Path.Combine(_testDirectory, "index.html"), htmlBuilder.ToString());
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}
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}
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