ImageSharp/tests/ImageSharp.Tests/Formats/Jpg/JpegMetadataTests.cs

// Copyright (c) Six Labors.
// Licensed under the Six Labors Split License.

using SixLabors.ImageSharp.Formats.Jpeg;

namespace SixLabors.ImageSharp.Tests.Formats.Jpg;

[Trait("Format", "Jpg")]
public class JpegMetadataTests
{
    [Fact]
    public void CloneIsDeep()
    {
        var meta = new JpegMetadata { ColorType = JpegEncodingColor.Luminance };
        var clone = (JpegMetadata)meta.DeepClone();

        clone.ColorType = JpegEncodingColor.YCbCrRatio420;

        Assert.False(meta.ColorType.Equals(clone.ColorType));
    }

    [Fact]
    public void Quality_DefaultQuality()
    {
        var meta = new JpegMetadata();

        Assert.Equal(meta.Quality, ImageSharp.Formats.Jpeg.Components.Quantization.DefaultQualityFactor);
    }

    [Fact]
    public void Quality_LuminanceOnlyQuality()
    {
        int quality = 50;

        var meta = new JpegMetadata { LuminanceQuality = quality };

        Assert.Equal(meta.Quality, quality);
    }

    [Fact]
    public void Quality_BothComponentsQuality()
    {
        int quality = 50;

        var meta = new JpegMetadata { LuminanceQuality = quality, ChrominanceQuality = quality };

        Assert.Equal(meta.Quality, quality);
    }

    [Fact]
    public void Quality_ReturnsMaxQuality()
    {
        int qualityLuma = 50;
        int qualityChroma = 30;

        var meta = new JpegMetadata { LuminanceQuality = qualityLuma, ChrominanceQuality = qualityChroma };

        Assert.Equal(meta.Quality, qualityLuma);
    }
}