﻿// 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 class ForKeywordRecommenderTests : KeywordRecommenderTests
    {
        [Fact]
        public async Task TestAtRoot_Interactive()
        {
            await VerifyKeywordAsync(SourceCodeKind.Script,
@"$$");
        }

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

        [Fact]
        public async Task TestAfterGlobalStatement_Interactive()
        {
            await VerifyKeywordAsync(SourceCodeKind.Script,
@"System.Console.WriteLine();
$$");
        }

        [Fact]
        public async Task TestAfterGlobalVariableDeclaration_Interactive()
        {
            await VerifyKeywordAsync(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 TestEmptyStatement()
        {
            await VerifyKeywordAsync(AddInsideMethod(
@"$$"));
        }

        [Fact]
        public async Task TestBeforeStatement()
        {
            await VerifyKeywordAsync(AddInsideMethod(
@"$$
return true;"));
        }

        [Fact]
        public async Task TestAfterStatement()
        {
            await VerifyKeywordAsync(AddInsideMethod(
@"return true;
$$"));
        }

        [Fact]
        public async Task TestAfterBlock()
        {
            await VerifyKeywordAsync(AddInsideMethod(
@"if (true) {
}
$$"));
        }

        [Fact]
        public async Task TestInsideFor()
        {
            await VerifyKeywordAsync(AddInsideMethod(
@"for (;;)
     $$"));
        }

        [Fact]
        public async Task TestInsideForInsideFor()
        {
            await VerifyKeywordAsync(AddInsideMethod(
@"for (;;)
     for (;;)
        $$"));
        }

        [Fact]
        public async Task TestInsideForBlock()
        {
            await VerifyKeywordAsync(AddInsideMethod(
@"for (;;) {
     $$"));
        }

        [Fact]
        public async Task TestNotAfterFor1()
        {
            await VerifyAbsenceAsync(AddInsideMethod(
@"for $$"));
        }

        [Fact]
        public async Task TestNotAfterFor2()
        {
            await VerifyAbsenceAsync(AddInsideMethod(
@"for ($$"));
        }

        [Fact]
        public async Task TestNotAfterFor3()
        {
            await VerifyAbsenceAsync(AddInsideMethod(
@"for (;$$"));
        }

        [Fact]
        public async Task TestNotAfterFor4()
        {
            await VerifyAbsenceAsync(AddInsideMethod(
@"for (;;$$"));
        }

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