[ModuleInitializer]
public static void Initialize()
{
    VerifyDocNet.Initialize();
    VerifyImageMagick.RegisterComparers(
        threshold: 0.13,
        ImageMagick.ErrorMetric.PerceptualHash);
}

[Test]
public Task VerifyPdf() =>
    VerifyFile("sample.pdf");

[Test]
public Task VerifyPdfStream()
{
    var stream = File.OpenRead("sample.pdf");
    return Verify(stream, "pdf");
}

[Test]
public Task VerifyPreserveTransparency() =>
    VerifyFile("sample.pdf")
        .PreserveTransparency();

[Test]
public Task VerifyPageDimensions() =>
    VerifyFile("sample.pdf")
        .PageDimensions(new(1080, 1920));

[Test]
public Task VerifyFirstPage()
{
    var stream = File.OpenRead("sample.pdf");
    return Verify(stream, "pdf").SinglePage(0);
}
[Test]
public Task VerifySecondPage()
{
    var stream = File.OpenRead("sample.pdf");
    return Verify(stream, "pdf").SinglePage(1);
}