﻿// 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.CSharp.Test.Utilities;
using Microsoft.CodeAnalysis.Test.Utilities;
using Roslyn.Test.Utilities;
using Xunit;

namespace Microsoft.CodeAnalysis.Editor.CSharp.UnitTests.Recommendations
{
    [Trait(Traits.Feature, Traits.Features.KeywordRecommending)]
    public class BaseKeywordRecommenderTests : KeywordRecommenderTests
    {
        [Fact]
        public async Task TestNotAtRoot_Interactive()
        {
            await VerifyAbsenceAsync(SourceCodeKind.Script,
@"$$");
        }

        [Fact]
        public async Task TestNotInTopLevelMethod()
        {
            await VerifyAbsenceAsync(SourceCodeKind.Script,
@"void Goo()
{
    $$
}");
        }

        [Fact]
        public async Task TestNotAfterClass_Interactive()
        {
            await VerifyAbsenceAsync(SourceCodeKind.Script,
@"class C { }
$$");
        }

        [Fact]
        public async Task TestNotAfterGlobalStatement()
        {
            await VerifyAbsenceAsync(
@"System.Console.WriteLine();
$$", options: CSharp9ParseOptions);
        }

        [Fact]
        public async Task TestNotAfterGlobalVariableDeclaration()
        {
            await VerifyAbsenceAsync(
@"int i = 0;
$$", options: CSharp9ParseOptions);
        }

        [Fact]
        public async Task TestNotInUsingAlias()
        {
            await VerifyAbsenceAsync(
@"using Goo = $$");
        }

        [Fact]
        public async Task TestNotInGlobalUsingAlias()
        {
            await VerifyAbsenceAsync(
@"global using Goo = $$");
        }

        [Fact]
        public async Task TestInClassConstructorInitializer()
        {
            await VerifyKeywordAsync(
@"class C {
    public C() : $$");
        }

        [Fact]
        public async Task TestInRecordConstructorInitializer()
        {
            // The recommender doesn't work in record in script
            // Tracked by https://github.com/dotnet/roslyn/issues/44865
            await VerifyWorkerAsync(@"
record C {
    public C() : $$", absent: false, options: TestOptions.RegularPreview);
        }

        [Fact]
        public async Task TestNotInStaticClassConstructorInitializer()
        {
            await VerifyAbsenceAsync(
@"class C {
    static C() : $$");
        }

        [Fact]
        public async Task TestNotInStructConstructorInitializer()
        {
            await VerifyAbsenceAsync(
@"struct C {
    public C() : $$");
        }

        [Fact]
        public async Task TestAfterCast()
        {
            await VerifyKeywordAsync(
@"struct C {
    new internal ErrorCode Code { get { return (ErrorCode)$$");
        }

        [Fact]
        public async Task TestInEmptyMethod()
        {
            await VerifyKeywordAsync(
                SourceCodeKind.Regular,
                AddInsideMethod(
@"$$"));
        }

        [Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/538264")]
        public async Task TestNotInEnumMemberInitializer1()
        {
            await VerifyAbsenceAsync(
@"enum E {
    a = $$
}");
        }

        [Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/544219")]
        public async Task TestNotInObjectInitializerMemberContext()
        {
            await VerifyAbsenceAsync(@"
class C
{
    public int x, y;
    void M()
    {
        var c = new C { x = 2, y = 3, $$");
        }

        [Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/16335")]
        public async Task InExpressionBodyAccessor()
        {
            await VerifyKeywordAsync(@"
class B
{
    public virtual int T { get => bas$$ }
}");
        }

        [Fact]
        public async Task TestAfterRefExpression()
        {
            await VerifyKeywordAsync(AddInsideMethod(
@"ref int x = ref $$"));
        }
    }
}
