// 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.Threading;
using Microsoft.CodeAnalysis.CSharp.Extensions.ContextQuery;
using Microsoft.CodeAnalysis.Shared.Extensions;
using Microsoft.CodeAnalysis.Test.Utilities;
using Xunit;
 
namespace Microsoft.CodeAnalysis.Editor.CSharp.UnitTests.IntelliSense.CompletionSetSources;
 
[Trait(Traits.Feature, Traits.Features.Completion)]
public class PossibleTupleContextTests : AbstractContextTests
{
    protected override void CheckResult(bool validLocation, int position, SyntaxTree syntaxTree)
    {
        var leftToken = syntaxTree.FindTokenOnLeftOfPosition(position, CancellationToken.None);
        var isPossibleTupleContext = syntaxTree.IsPossibleTupleContext(leftToken, position);
 
        Assert.Equal(validLocation, isPossibleTupleContext);
    }
 
    private void VerifyMultipleContexts(string x)
    {
        VerifyTrue(x);
        VerifyTrue(AddInsideClass(x));
        VerifyTrue(AddInsideMethod(x));
    }
 
    [Fact]
    public void Test1()
        => VerifyMultipleContexts(@"((a, b) $$");
 
    [Fact]
    public void Test2()
        => VerifyMultipleContexts(@"(xyz, (a, b) $$");
 
    [Fact]
    public void Test3()
        => VerifyMultipleContexts(@"(a $$");
 
    [Fact]
    public void Test4()
        => VerifyMultipleContexts(@"(a, b $$");
 
    [Fact]
    public void Test5()
        => VerifyMultipleContexts(@"($$");
 
    [Fact]
    public void Test6()
        => VerifyMultipleContexts(@"(a, $$");
 
    [Fact]
    public void Test7()
        => VerifyMultipleContexts(@"(a.b $$");
 
    [Fact]
    public void Test8()
        => VerifyMultipleContexts(@"(a, a.b $$");
 
    [Fact]
    public void Test9()
        => VerifyTrue(@"class C : I<($$");
 
    [Fact]
    public void Test10()
        => VerifyTrue(@"class C : I<(a, $$");
 
    [Fact]
    public void Test11()
        => VerifyTrue(AddInsideMethod(@"(var $$)"));
 
    [Fact]
    public void Test12()
        => VerifyTrue(AddInsideMethod(@"(var a, var $$)"));
 
    [Fact]
    public void Test13()
        => VerifyTrue(AddInsideMethod(@"var str = (($$)items) as string;"));
 
    [Fact]
    public void False1()
        => VerifyFalse(@"$$");
 
    [Fact]
    public void False2()
        => VerifyFalse(AddInsideMethod(@"(int) $$"));
 
    [Fact]
    public void False3()
        => VerifyFalse(AddInsideMethod(@"(Goo()) $$"));
}