// 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 Roslyn.Test.Utilities;
using Xunit;
 
namespace Microsoft.CodeAnalysis.Editor.CSharp.UnitTests.Recommendations;
 
[Trait(Traits.Feature, Traits.Features.KeywordRecommending)]
public sealed class OperatorKeywordRecommenderTests : 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 TestAfterImplicit()
    {
        await VerifyKeywordAsync(
            """
            class Goo {
                public static implicit $$
            """);
    }
 
    [Fact]
    public async Task TestAfterExplicit()
    {
        await VerifyKeywordAsync(
            """
            class Goo {
                public static explicit $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterType()
    {
        await VerifyAbsenceAsync(
            """
            class Goo {
                int $$
            """);
    }
 
    [Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/542271")]
    public async Task TestAfterPublicStaticType()
    {
        await VerifyAbsenceAsync(
            """
            class Goo {
                public static int $$
            """);
    }
 
    [Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/542271")]
    public async Task TestAfterPublicStaticExternType()
    {
        await VerifyAbsenceAsync(
            """
            class Goo {
                public static extern int $$
            """);
    }
 
    [Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/542271")]
    public async Task TestAfterGenericType()
    {
        await VerifyAbsenceAsync(
            """
            class Goo {
                public static IList<int> $$
            """);
    }
 
    [Fact]
    public async Task TestNotInInterface()
    {
        await VerifyAbsenceAsync(
            """
            interface Goo {
                public static int $$
            """);
    }
 
    [Fact]
    public async Task TestWithinExtension1()
    {
        await VerifyAbsenceAsync(
            """
            static class C
            {
                extension(string s)
                {
                    $$
                }
            }
            """, CSharpNextParseOptions);
    }
 
    [Fact]
    public async Task TestWithinExtension2()
    {
        await VerifyKeywordAsync(
            """
            static class C
            {
                extension(string s)
                {
                    public static explicit $$
                }
            }
            """,
            CSharpNextParseOptions,
            CSharpNextScriptParseOptions);
    }
}