// 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 WhileKeywordRecommenderTests : 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()
    {
        await VerifyKeywordAsync(
            """
            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 TestInsideWhile()
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            while (true)
                 $$
            """));
    }
 
    [Fact]
    public async Task TestInsideWhileInsideWhile()
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            while (true)
                 while (true)
                    $$
            """));
    }
 
    [Fact]
    public async Task TestInsideWhileBlock()
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            while (true) {
                 $$
            """));
    }
 
    [Fact]
    public async Task TestAfterDo()
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            do
                 Console.WriteLine();
              $$
            """));
    }
 
    [Fact]
    public async Task TestAfterDoBlock()
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            do {
            } $$
            """));
    }
 
    [Fact]
    public async Task TestNotAfterWhile1()
    {
        await VerifyAbsenceAsync(AddInsideMethod(
@"while $$"));
    }
 
    [Fact]
    public async Task TestNotAfterWhile2()
    {
        await VerifyAbsenceAsync(AddInsideMethod(
@"while ($$"));
    }
 
    [Fact]
    public async Task TestNotAfterWhile3()
    {
        await VerifyAbsenceAsync(AddInsideMethod(
@"while (true $$"));
    }
 
    [Fact]
    public async Task TestNotInClass()
    {
        await VerifyAbsenceAsync("""
            class C
            {
              $$
            }
            """);
    }
 
    [Fact]
    public async Task TestAfterUsing()
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            using (var e2 = other.TypeArguments.GetEnumerator())
                $$
            """));
    }
 
    [Fact]
    public async Task TestAfterLock()
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            lock (expr)
                $$
            """));
    }
}