sharpemu/tests/SharpEmu.Libs.Tests/GUI/PerGameSettingsTests.cs

// Copyright (C) 2026 SharpEmu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later

using SharpEmu.GUI;
using Xunit;

namespace SharpEmu.Libs.Tests.GUI;

public sealed class PerGameSettingsTests
{
    // Invalid entries must not reach Environment.SetEnvironmentVariable.
    [Fact]
    public void NormalizeFromJson_NullOrEmptyToggleEntries_AreFilteredOut()
    {
        const string json = """
            { "EnvironmentToggles": [null, "SHARPEMU_TRACE", ""] }
            """;

        var settings = PerGameSettings.NormalizeFromJson(json);

        Assert.NotNull(settings);
        Assert.Equal(["SHARPEMU_TRACE"], settings.EnvironmentToggles);
    }

    // A null list means that the global setting should be inherited.
    [Fact]
    public void NormalizeFromJson_NullToggleList_StaysNull()
    {
        const string json = """{ "EnvironmentToggles": null }""";

        var settings = PerGameSettings.NormalizeFromJson(json);

        Assert.NotNull(settings);
        Assert.Null(settings.EnvironmentToggles);
    }

    [Fact]
    public void NormalizeFromJson_EmptyToggleList_StaysEmpty()
    {
        const string json = """{ "EnvironmentToggles": [] }""";

        var settings = PerGameSettings.NormalizeFromJson(json);

        Assert.NotNull(settings);
        Assert.Empty(Assert.IsType<List<string>>(settings.EnvironmentToggles));
    }

    [Fact]
    public void NormalizeFromJson_ValidToggles_ArePreserved()
    {
        const string json = """
            { "EnvironmentToggles": ["SHARPEMU_TRACE", "SHARPEMU_NO_JIT"] }
            """;

        var settings = PerGameSettings.NormalizeFromJson(json);

        Assert.NotNull(settings);
        Assert.Equal(["SHARPEMU_TRACE", "SHARPEMU_NO_JIT"], settings.EnvironmentToggles);
    }
}