// 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.Linq;
using System.Threading;
using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.Completion;
using Microsoft.CodeAnalysis.Completion.Providers;
using Microsoft.CodeAnalysis.Test.Utilities;
using Roslyn.Test.Utilities;
using Xunit;
 
namespace Microsoft.CodeAnalysis.Editor.CSharp.UnitTests.IntelliSense.CompletionSetSources;
 
[Trait(Traits.Feature, Traits.Features.Completion)]
public class GlobalAssemblyCacheCompletionHelperTests
{
    [ConditionalFact(typeof(WindowsOnly))]
    public void ExistingReference()
    {
        var code = "System.Windows";
        VerifyPresence(code, "System.Windows.Forms");
    }
 
    [ConditionalFact(typeof(WindowsOnly))]
    public void FullReferenceIdentity()
    {
        var code = "System,";
        VerifyPresence(code, typeof(System.Diagnostics.Process).Assembly.FullName);
    }
 
    private static void VerifyPresence(string pathSoFar, string completionItem)
    {
        var completions = GetItems(pathSoFar);
        Assert.True(completions.Any(c => c.DisplayText == completionItem));
    }
 
    private static IEnumerable<CompletionItem> GetItems(string pathSoFar)
    {
        var helper = new GlobalAssemblyCacheCompletionHelper(CompletionItemRules.Default);
        return helper.GetItems(pathSoFar, CancellationToken.None);
    }
}