// 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 UndefKeywordRecommenderTests : 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 TestAfterHash()
    {
        await VerifyKeywordAsync(
@"#$$");
    }
 
    [Fact]
    public async Task TestAfterHashAndSpace()
    {
        await VerifyKeywordAsync(
@"# $$");
    }
 
    [Fact]
    public async Task TestNestedPreprocessor()
    {
        await VerifyKeywordAsync(
            """
            #if true
                #$$
            #endif
            """);
    }
 
    [Fact]
    public async Task TestBeforeUsing()
    {
        await VerifyKeywordAsync(
            """
            #$$
            using System;
            """);
    }
 
    [Fact]
    public async Task TestBeforeGlobalUsing()
    {
        await VerifyKeywordAsync(
            """
            #$$
            global using System;
            """);
    }
 
    [Fact]
    public async Task TestNotAfterUsing()
    {
        await VerifyAbsenceAsync(
            """
            using System;
            #$$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterGlobalUsing()
    {
        await VerifyAbsenceAsync(
            """
            global using System;
            #$$
            """);
    }
}