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using System.Linq;
using MediaBrowser.Model.Extensions;
using MediaBrowser.Model.Providers;
using Xunit;
namespace Jellyfin.Model.Tests.Extensions;
public class EnumerableExtensionsTests
{
[Fact]
public void OrderByLanguageDescending_PreferredLanguageFirst()
{
var images = new[]
{
new RemoteImageInfo { Language = "en", CommunityRating = 5.0, VoteCount = 100 },
new RemoteImageInfo { Language = "de", CommunityRating = 9.0, VoteCount = 200 },
new RemoteImageInfo { Language = null, CommunityRating = 7.0, VoteCount = 50 },
new RemoteImageInfo { Language = "fr", CommunityRating = 8.0, VoteCount = 150 },
};
var result = images.OrderByLanguageDescending("de").ToList();
Assert.Equal("de", result[0].Language);
Assert.Equal("en", result[1].Language);
Assert.Null(result[2].Language);
Assert.Equal("fr", result[3].Language);
}
[Fact]
public void OrderByLanguageDescending_EnglishBeforeNoLanguage()
{
var images = new[]
{
new RemoteImageInfo { Language = null, CommunityRating = 9.0, VoteCount = 500 },
new RemoteImageInfo { Language = "en", CommunityRating = 3.0, VoteCount = 10 },
};
var result = images.OrderByLanguageDescending("de").ToList();
// English should come before no-language, even with lower rating
Assert.Equal("en", result[0].Language);
Assert.Null(result[1].Language);
}
[Fact]
public void OrderByLanguageDescending_SameLanguageSortedByRatingThenVoteCount()
{
var images = new[]
{
new RemoteImageInfo { Language = "de", CommunityRating = 5.0, VoteCount = 100 },
new RemoteImageInfo { Language = "de", CommunityRating = 9.0, VoteCount = 50 },
new RemoteImageInfo { Language = "de", CommunityRating = 9.0, VoteCount = 200 },
};
var result = images.OrderByLanguageDescending("de").ToList();
Assert.Equal(200, result[0].VoteCount);
Assert.Equal(50, result[1].VoteCount);
Assert.Equal(100, result[2].VoteCount);
}
[Fact]
public void OrderByLanguageDescending_NullRequestedLanguage_DefaultsToEnglish()
{
var images = new[]
{
new RemoteImageInfo { Language = "fr", CommunityRating = 9.0, VoteCount = 500 },
new RemoteImageInfo { Language = "en", CommunityRating = 5.0, VoteCount = 10 },
};
var result = images.OrderByLanguageDescending(null!).ToList();
// With null requested language, English becomes the preferred language (score 4)
Assert.Equal("en", result[0].Language);
Assert.Equal("fr", result[1].Language);
}
[Fact]
public void OrderByLanguageDescending_EnglishRequested_NoDoubleBoost()
{
// When requested language IS English, "en" gets score 4 (requested match),
// no-language gets score 2, others get score 0
var images = new[]
{
new RemoteImageInfo { Language = null, CommunityRating = 9.0, VoteCount = 500 },
new RemoteImageInfo { Language = "en", CommunityRating = 3.0, VoteCount = 10 },
new RemoteImageInfo { Language = "fr", CommunityRating = 8.0, VoteCount = 300 },
};
var result = images.OrderByLanguageDescending("en").ToList();
Assert.Equal("en", result[0].Language);
Assert.Null(result[1].Language);
Assert.Equal("fr", result[2].Language);
}
[Fact]
public void OrderByLanguageDescending_FullPriorityOrder()
{
var images = new[]
{
new RemoteImageInfo { Language = "fr", CommunityRating = 9.0, VoteCount = 500 },
new RemoteImageInfo { Language = null, CommunityRating = 8.0, VoteCount = 400 },
new RemoteImageInfo { Language = "en", CommunityRating = 7.0, VoteCount = 300 },
new RemoteImageInfo { Language = "de", CommunityRating = 6.0, VoteCount = 200 },
};
var result = images.OrderByLanguageDescending("de").ToList();
// Expected order: de (requested) > en > no-language > fr (other)
Assert.Equal("de", result[0].Language);
Assert.Equal("en", result[1].Language);
Assert.Null(result[2].Language);
Assert.Equal("fr", result[3].Language);
}
}
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