// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
 
#nullable disable
 
using System.Collections.Generic;
using System.Collections.Immutable;
using Microsoft.CodeAnalysis.Wrapping;
using Xunit;
 
namespace Microsoft.CodeAnalysis.Editor.CSharp.UnitTests.Wrapping;
 
public class SortingTests
{
    [Fact]
    public void FirstNotInMruSecondNotInMru()
    {
        var items = ImmutableArray.Create("Action1", "Action2");
 
        var sorted = WrapItemsAction.SortByMostRecentlyUsed(
            items, [], a => a);
 
        // Shouldn't change order
        Assert.Equal((IEnumerable<string>)items, sorted);
    }
 
    [Fact]
    public void FirstInMruSecondNotInMru()
    {
        var items = ImmutableArray.Create("Action1", "Action2");
 
        var sorted = WrapItemsAction.SortByMostRecentlyUsed(
            items, ImmutableArray.Create("Action1"), a => a);
 
        // Shouldn't change order
        Assert.Equal((IEnumerable<string>)items, sorted);
    }
 
    [Fact]
    public void FirstNotInMruSecondInMru()
    {
        var items = ImmutableArray.Create("Action1", "Action2");
 
        var sorted = WrapItemsAction.SortByMostRecentlyUsed(
            items, ImmutableArray.Create("Action2"), a => a);
 
        // Should swap order.
        Assert.Equal((IEnumerable<string>)ImmutableArray.Create("Action2", "Action1"), sorted);
    }
 
    [Fact]
    public void FirstInMruSecondInMru1()
    {
        var items = ImmutableArray.Create("Action1", "Action2");
 
        var sorted = WrapItemsAction.SortByMostRecentlyUsed(
            items, ImmutableArray.Create("Action1", "Action2"), a => a);
 
        // Shouldn't change order
        Assert.Equal((IEnumerable<string>)items, sorted);
    }
 
    [Fact]
    public void FirstInMruSecondInMru2()
    {
        var items = ImmutableArray.Create("Action1", "Action2");
 
        var sorted = WrapItemsAction.SortByMostRecentlyUsed(
            items, ImmutableArray.Create("Action2", "Action1"), a => a);
 
        // Should swap order.
        Assert.Equal((IEnumerable<string>)ImmutableArray.Create("Action2", "Action1"), sorted);
    }
}