// 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.
 
using System.Threading.Tasks;
using Microsoft.CodeAnalysis.Test.Utilities;
using Xunit;
 
namespace Microsoft.CodeAnalysis.Editor.CSharp.UnitTests.Recommendations;
 
[Trait(Traits.Feature, Traits.Features.KeywordRecommending)]
public sealed class TypeVarKeywordRecommenderTests : KeywordRecommenderTests
{
    [Fact]
    public async Task TestNotAtRoot_Interactive()
    {
        await VerifyAbsenceAsync(SourceCodeKind.Script,
@"$$");
    }
 
    [Fact]
    public async Task TestNotAfterClass_Interactive()
    {
        await VerifyAbsenceAsync(SourceCodeKind.Script,
            """
            class C { }
            $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterGlobalStatement_Interactive()
    {
        await VerifyAbsenceAsync(SourceCodeKind.Script,
            """
            System.Console.WriteLine();
            $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterGlobalVariableDeclaration_Interactive()
    {
        await VerifyAbsenceAsync(SourceCodeKind.Script,
            """
            int i = 0;
            $$
            """);
    }
 
    [Fact]
    public async Task TestNotInUsingAlias()
    {
        await VerifyAbsenceAsync(
@"using Goo = $$");
    }
 
    [Fact]
    public async Task TestNotInGlobalUsingAlias()
    {
        await VerifyAbsenceAsync(
@"global using Goo = $$");
    }
 
    [Fact]
    public async Task TestNotInEmptyStatement()
    {
        await VerifyAbsenceAsync(AddInsideMethod(
@"$$"));
    }
 
    [Fact]
    public async Task TestNotInAttributeInsideClass()
    {
        await VerifyAbsenceAsync(
            """
            class C {
                [$$
            """);
    }
 
    [Fact]
    public async Task TestNotInAttributeAfterAttributeInsideClass()
    {
        await VerifyAbsenceAsync(
            """
            class C {
                [Goo]
                [$$
            """);
    }
 
    [Fact]
    public async Task TestNotInAttributeAfterMethod()
    {
        await VerifyAbsenceAsync(
            """
            class C {
                void Goo() {
                }
                [$$
            """);
    }
 
    [Fact]
    public async Task TestNotInAttributeAfterProperty()
    {
        await VerifyAbsenceAsync(
            """
            class C {
                int Goo {
                    get;
                }
                [$$
            """);
    }
 
    [Fact]
    public async Task TestNotInAttributeAfterField()
    {
        await VerifyAbsenceAsync(
            """
            class C {
                int Goo;
                [$$
            """);
    }
 
    [Fact]
    public async Task TestNotInAttributeAfterEvent()
    {
        await VerifyAbsenceAsync(
            """
            class C {
                event Action<int> Goo;
                [$$
            """);
    }
 
    [Fact]
    public async Task TestNotInOuterAttribute()
    {
        await VerifyAbsenceAsync(
@"[$$");
    }
 
    [Fact]
    public async Task TestNotInParameterAttribute()
    {
        await VerifyAbsenceAsync(
            """
            class C {
                void Goo([$$
            """);
    }
 
    [Fact]
    public async Task TestNotInPropertyAttribute()
    {
        await VerifyAbsenceAsync(
            """
            class C {
                int Goo { [$$
            """);
    }
 
    [Fact]
    public async Task TestNotInEventAttribute()
    {
        await VerifyAbsenceAsync(
            """
            class C {
                event Action<int> Goo { [$$
            """);
    }
 
    [Fact]
    public async Task TestInClassTypeParameters()
    {
        await VerifyKeywordAsync(
@"class C<[$$");
    }
 
    [Fact]
    public async Task TestInDelegateTypeParameters()
    {
        await VerifyKeywordAsync(
@"delegate void D<[$$");
    }
 
    [Fact]
    public async Task TestInMethodTypeParameters()
    {
        await VerifyKeywordAsync(
            """
            class C {
                void M<[$$
            """);
    }
 
    [Fact]
    public async Task TestNotInInterface()
    {
        await VerifyAbsenceAsync(
            """
            interface I {
                [$$
            """);
    }
 
    [Fact]
    public async Task TestNotInStruct()
    {
        await VerifyAbsenceAsync(
            """
            struct S {
                [$$
            """);
    }
 
    [Fact]
    public async Task TestNotInEnum()
    {
        await VerifyAbsenceAsync(
            """
            enum E {
                [$$
            """);
    }
}