NewKeywordRecommenderTests.cs

// 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 NewKeywordRecommenderTests : KeywordRecommenderTests
{
    [Fact]
    public async Task TestAtRoot()
    {
        await VerifyKeywordAsync(
@"$$");
    }
 
    [Fact]
    public async Task TestAfterClass()
    {
        await VerifyKeywordAsync(
            """
            class C { }
            $$
            """);
    }
 
    [Fact]
    public async Task TestAfterGlobalStatement()
    {
        await VerifyKeywordAsync(
            """
            System.Console.WriteLine();
            $$
            """);
    }
 
    [Fact]
    public async Task TestAfterGlobalVariableDeclaration()
    {
        await VerifyKeywordAsync(
            """
            int i = 0;
            $$
            """);
    }
 
    [Fact]
    public async Task TestNotInUsingAlias()
    {
        await VerifyAbsenceAsync(
@"using Goo = $$");
    }
 
    [Fact]
    public async Task TestNotInGlobalUsingAlias()
    {
        await VerifyAbsenceAsync(
@"global using Goo = $$");
    }
 
    [Theory, CombinatorialData]
    public async Task TestEmptyStatement(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"$$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Fact]
    public async Task TestAfterNewTypeParameterConstraint()
    {
        await VerifyKeywordAsync(
@"class C<T> where T : $$");
    }
 
    [Fact]
    public async Task TestAfterTypeParameterConstraint2()
    {
        await VerifyKeywordAsync(
            """
            class C<T>
                where T : $$
                where U : U
            """);
    }
 
    [Fact]
    public async Task TestAfterMethodTypeParameterConstraint()
    {
        await VerifyKeywordAsync(
            """
            class C {
                void Goo<T>()
                  where T : $$
            """);
    }
 
    [Fact]
    public async Task TestAfterMethodTypeParameterConstraint2()
    {
        await VerifyKeywordAsync(
            """
            class C {
                void Goo<T>()
                  where T : $$
                  where U : T
            """);
    }
 
    [Fact]
    public async Task TestAfterClassTypeParameterConstraint()
    {
        await VerifyKeywordAsync(
@"class C<T> where T : class, $$");
    }
 
    [Fact]
    public async Task TestNotAfterStructTypeParameterConstraint()
    {
        await VerifyAbsenceAsync(
@"class C<T> where T : struct, $$");
    }
 
    [Fact]
    public async Task TestAfterSimpleTypeParameterConstraint()
    {
        await VerifyKeywordAsync(
@"class C<T> where T : IGoo, $$");
    }
 
    [Theory, CombinatorialData]
    public async Task TestStartOfExpression(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"var q = $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    [WorkItem("https://github.com/dotnet/roslyn/issues/34324")]
    public async Task TestAfterNullCoalescingAssignment(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"q ??= $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestInParenthesizedExpression(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"var q = ($$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestPlusEquals(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"q += $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestMinusEquals(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"q -= $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestTimesEquals(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"q *= $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestDivideEquals(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"q /= $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestModEquals(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"q %= $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestXorEquals(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"q ^= $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestAndEquals(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"q &= $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestOrEquals(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"q |= $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestLeftShiftEquals(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"q <<= $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestRightShiftEquals(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"q >>= $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestAfterMinus(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"- $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestAfterPlus(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"+ $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestAfterNot(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"! $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestAfterTilde(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"~ $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestAfterBinaryTimes(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"a * $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestAfterBinaryDivide(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"a / $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestAfterBinaryMod(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"a % $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestAfterBinaryPlus(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"a + $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestAfterBinaryMinus(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"a - $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestAfterBinaryLeftShift(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"a << $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestAfterBinaryRightShift(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"a >> $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestAfterBinaryLessThan(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"a < $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestAfterBinaryGreaterThan(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"a > $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestAfterEqualsEquals(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"a == $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestAfterNotEquals(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"a != $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestAfterLessThanEquals(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"a <= $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestAfterGreaterThanEquals(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"a >= $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestAfterNullable(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"a ?? $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestAfterArrayRankSpecifier1(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"new int[ $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestAfterArrayRankSpecifier2(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"new int[expr, $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestAfterConditional1(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"a ? $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory]
    [InlineData(false)]
    [InlineData(true, Skip = "https://github.com/dotnet/roslyn/issues/44443")]
    public async Task TestAfterConditional2(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"a ? expr | $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestInArgument1(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"Goo( $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestInArgument2(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"Goo(expr, $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestInArgument3(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"new Goo( $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestInArgument4(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"new Goo(expr, $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestAfterRef(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"Goo(ref $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestAfterOut(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"Goo(out $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestLambda(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"Action<int> a = i => $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestInCollectionInitializer1(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"new System.Collections.Generic.List<int>() { $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestInCollectionInitializer2(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"new System.Collections.Generic.List<int>() { expr, $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestInForeachIn(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"foreach (var v in $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestInAwaitForeachIn(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"await foreach (var v in $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestInFromIn(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"var q = from x in $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestInJoinIn(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            var q = from x in y
                      join a in $$
            """, topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestInJoinOn(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            var q = from x in y
                      join a in b on $$
            """, topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestInJoinEquals(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            var q = from x in y
                      join a in b on equals $$
            """, topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestWhere(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            var q = from x in y
                      where $$
            """, topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestOrderby1(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            var q = from x in y
                      orderby $$
            """, topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestOrderby2(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            var q = from x in y
                      orderby a, $$
            """, topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestOrderby3(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            var q = from x in y
                      orderby a ascending, $$
            """, topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestAfterSelect(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            var q = from x in y
                      select $$
            """, topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestAfterGroup(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            var q = from x in y
                      group $$
            """, topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestAfterGroupBy(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            var q = from x in y
                      group expr by $$
            """, topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestAfterReturn(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"return $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestAfterYieldReturn(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"yield return $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Fact]
    public async Task TestNotAfterAttributeReturn()
    {
        await VerifyAbsenceAsync(
@"[return $$");
    }
 
    [Theory, CombinatorialData]
    public async Task TestAfterThrow(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"throw $$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestInWhile(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"while ($$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestInUsing(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"using ($$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestInAwaitUsing(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"await using ($$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestInLock(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"lock ($$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestInIf(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"if ($$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Theory, CombinatorialData]
    public async Task TestInSwitch(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"switch ($$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [Fact]
    public async Task TestAfterExtern()
    {
        await VerifyKeywordAsync("""
            extern alias Goo;
            $$
            """);
    }
 
    [Fact]
    public async Task TestAfterUsing()
    {
        await VerifyKeywordAsync("""
            using Goo;
            $$
            """);
    }
 
    [Fact]
    public async Task TestAfterGlobalUsing()
    {
        await VerifyKeywordAsync(
            """
            global using Goo;
            $$
            """);
    }
 
    [Fact]
    public async Task TestAfterNamespace()
    {
        await VerifyKeywordAsync("""
            namespace N {}
            $$
            """);
    }
 
    [Fact]
    public async Task TestAfterFileScopedNamespace()
    {
        await VerifyAbsenceAsync(
            """
            namespace N;
            $$
            """);
    }
 
    [Fact]
    public async Task TestAfterDelegateDeclaration()
    {
        await VerifyKeywordAsync("""
            delegate void Goo();
            $$
            """);
    }
 
    [Fact]
    public async Task TestAfterMethodInClass()
    {
        await VerifyKeywordAsync(
            """
            class C {
              void Goo() {}
              $$
            """);
    }
 
    [Fact]
    public async Task TestAfterFieldInClass()
    {
        await VerifyKeywordAsync(
            """
            class C {
              int i;
              $$
            """);
    }
 
    [Fact]
    public async Task TestAfterPropertyInClass()
    {
        await VerifyKeywordAsync(
            """
            class C {
              int i { get; }
              $$
            """);
    }
 
    [Fact]
    public async Task TestNotBeforeUsing()
    {
        await VerifyAbsenceAsync(SourceCodeKind.Regular,
            """
            $$
            using Goo;
            """);
    }
 
    [Fact(Skip = "https://github.com/dotnet/roslyn/issues/9880")]
    public async Task TestNotBeforeUsing_Interactive()
    {
        await VerifyAbsenceAsync(SourceCodeKind.Script,
            """
            $$
            using Goo;
            """);
    }
 
    [Fact]
    public async Task TestNotBeforeGlobalUsing()
    {
        await VerifyAbsenceAsync(SourceCodeKind.Regular,
            """
            $$
            global using Goo;
            """);
    }
 
    [Fact(Skip = "https://github.com/dotnet/roslyn/issues/9880")]
    public async Task TestNotBeforeGlobalUsing_Interactive()
    {
        await VerifyAbsenceAsync(SourceCodeKind.Script,
            """
            $$
            global using Goo;
            """);
    }
 
    [Fact]
    public async Task TestAfterAssemblyAttribute()
    {
        await VerifyKeywordAsync("""
            [assembly: goo]
            $$
            """);
    }
 
    [Fact]
    public async Task TestAfterRootAttribute()
    {
        await VerifyKeywordAsync(SourceCodeKind.Regular, """
            [goo]
            $$
            """);
    }
 
    [Fact]
    public async Task TestAfterRootAttribute_Interactive()
    {
        // The global function could be hiding a member inherited from System.Object.
        await VerifyKeywordAsync(SourceCodeKind.Script, """
            [goo]
            $$
            """);
    }
 
    [Fact]
    public async Task TestAfterNestedAttribute()
    {
        await VerifyKeywordAsync(
            """
            class C {
              [goo]
              $$
            """);
    }
 
    [Fact]
    public async Task TestInsideStruct()
    {
        await VerifyKeywordAsync(
            """
            struct S {
               $$
            """);
    }
 
    [Fact]
    public async Task TestInsideInterface()
    {
        await VerifyKeywordAsync(
            """
            interface I {
               $$
            """);
    }
 
    [Fact]
    public async Task TestInsideClass()
    {
        await VerifyKeywordAsync(
            """
            class C {
               $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterPartial()
        => await VerifyAbsenceAsync(@"partial $$");
 
    [Fact]
    public async Task TestNotAfterAbstract()
        => await VerifyAbsenceAsync(@"abstract $$");
 
    [Fact]
    public async Task TestNotAfterInternal()
        => await VerifyAbsenceAsync(SourceCodeKind.Regular, @"internal $$");
 
    [Fact]
    public async Task TestAfterInternal_Interactive()
        => await VerifyKeywordAsync(SourceCodeKind.Script, @"internal $$");
 
    [Fact]
    public async Task TestNotAfterPublic()
        => await VerifyAbsenceAsync(SourceCodeKind.Regular, @"public $$");
 
    [Fact]
    public async Task TestAfterPublic_Interactive()
        => await VerifyKeywordAsync(SourceCodeKind.Script, @"public $$");
 
    [Fact]
    public async Task TestNotAfterStaticInternal()
        => await VerifyAbsenceAsync(SourceCodeKind.Regular, @"static internal $$");
 
    [Fact]
    public async Task TestAfterStaticInternal_Interactive()
        => await VerifyKeywordAsync(SourceCodeKind.Script, @"static internal $$");
 
    [Fact]
    public async Task TestNotAfterInternalStatic()
        => await VerifyAbsenceAsync(SourceCodeKind.Regular, @"internal static $$");
 
    [Fact]
    public async Task TestAfterInternalStatic_Interactive()
        => await VerifyKeywordAsync(SourceCodeKind.Script, @"internal static $$");
 
    [Fact]
    public async Task TestNotAfterInvalidInternal()
        => await VerifyAbsenceAsync(@"virtual internal $$");
 
    [Fact]
    public async Task TestNotAfterClass()
        => await VerifyAbsenceAsync(@"class $$");
 
    [Fact]
    public async Task TestNotAfterPrivate()
    {
        await VerifyAbsenceAsync(SourceCodeKind.Regular,
@"private $$");
    }
 
    [Fact]
    public async Task TestAfterPrivate_Script()
    {
        await VerifyKeywordAsync(SourceCodeKind.Script,
@"private $$");
    }
 
    [Fact]
    public async Task TestNotAfterSealed()
        => await VerifyAbsenceAsync(@"sealed $$");
 
    [Fact]
    public async Task TestNotAfterStatic()
        => await VerifyAbsenceAsync(SourceCodeKind.Regular, @"static $$");
 
    [Fact]
    public async Task TestAfterStatic_Interactive()
        => await VerifyKeywordAsync(SourceCodeKind.Script, @"static $$");
 
    [Fact]
    public async Task TestAfterNestedStatic()
    {
        await VerifyKeywordAsync(
            """
            class C {
                static $$
            """);
    }
 
    [Fact]
    public async Task TestAfterNestedInternal()
    {
        await VerifyKeywordAsync(
            """
            class C {
                internal $$
            """);
    }
 
    [Fact]
    public async Task TestAfterNestedPrivate()
    {
        await VerifyKeywordAsync(
            """
            class C {
                private $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterDelegate()
        => await VerifyAbsenceAsync(@"delegate $$");
 
    [Fact]
    public async Task TestAfterNestedAbstract()
    {
        await VerifyKeywordAsync(
            """
            class C {
                abstract $$
            """);
    }
 
    [Fact]
    public async Task TestAfterNestedVirtual()
    {
        await VerifyKeywordAsync(
            """
            class C {
                virtual $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterNestedNew()
    {
        await VerifyAbsenceAsync("""
            class C {
                new $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterNestedOverride()
    {
        await VerifyAbsenceAsync("""
            class C {
                override $$
            """);
    }
 
    [Fact]
    public async Task TestAfterNestedSealed()
    {
        await VerifyKeywordAsync(
            """
            class C {
                sealed $$
            """);
    }
 
    [Fact]
    public async Task TestNotInProperty()
    {
        await VerifyAbsenceAsync(
            """
            class C {
                int Goo { $$
            """);
    }
 
    [Fact]
    public async Task TestNotInPropertyAfterAccessor()
    {
        await VerifyAbsenceAsync(
            """
            class C {
                int Goo { get; $$
            """);
    }
 
    [Fact]
    public async Task TestNotInPropertyAfterAccessibility()
    {
        await VerifyAbsenceAsync(
            """
            class C {
                int Goo { get; protected $$
            """);
    }
 
    [Fact]
    public async Task TestNotInPropertyAfterInternal()
    {
        await VerifyAbsenceAsync(
            """
            class C {
                int Goo { get; internal $$
            """);
    }
 
    [Fact]
    public async Task TestAfterCastType1()
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"return (LeafSegment)$$"));
    }
 
    [Fact]
    public async Task TestAfterCastType2()
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"return (LeafSegment)(object)$$"));
    }
 
    [Fact]
    public async Task TestNotAfterParenthesizedExpression()
    {
        await VerifyAbsenceAsync(AddInsideMethod(
@"return (a + b)$$"));
    }
 
    [Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/538264")]
    public async Task TestInConstMemberInitializer1()
    {
        // User could say "new int()" here.
        await VerifyKeywordAsync(
            """
            class E {
                const int a = $$
            }
            """);
    }
 
    [Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/538264")]
    public async Task TestInConstLocalInitializer1()
    {
        // User could say "new int()" here.
        await VerifyKeywordAsync(
            """
            class E {
              void Goo() {
                const int a = $$
              }
            }
            """);
    }
 
    [Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/538264")]
    public async Task TestInMemberInitializer1()
    {
        await VerifyKeywordAsync(
            """
            class E {
                int a = $$
            }
            """);
    }
 
    [Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/538804")]
    public async Task TestNotInTypeOf()
    {
        await VerifyAbsenceAsync(AddInsideMethod(
@"typeof($$"));
    }
 
    [Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/538804")]
    public async Task TestNotInDefault()
    {
        await VerifyAbsenceAsync(AddInsideMethod(
@"default($$"));
    }
 
    [Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/538804")]
    public async Task TestNotInSizeOf()
    {
        await VerifyAbsenceAsync(AddInsideMethod(
@"sizeof($$"));
    }
 
    [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/544486")]
    public async Task TestInsideInitOfConstFieldDecl()
    {
        // user could say "new int()" here.
        await VerifyKeywordAsync(
            """
            class C
            {
                const int value = $$
            """);
    }
 
    [Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/544998")]
    public async Task TestInsideStructParameterInitializer()
    {
        await VerifyKeywordAsync(
            """
            struct C
            {
                void M(C c = $$
            }
            """);
    }
 
    [Fact]
    public async Task TestAfterRefExpression()
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"ref int x = ref $$"));
    }
 
    [Fact]
    public async Task TestInRawStringInterpolation_SingleLine()
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """"
            var x = $"""{$$}"""
            """"));
    }
 
    [Fact]
    public async Task TestInRawStringInterpolation_SingleLine_MultiBrace()
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """"
            var x = ${|#0:|}$"""{{$$}}"""
            """"));
    }
 
    [Fact]
    public async Task TestInRawStringInterpolation_SingleLineIncomplete()
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"var x = $""""""{$$"));
    }
 
    [Fact]
    public async Task TestInRawStringInterpolation_MultiLine()
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """"
            var x = $"""
            {$$}
            """
            """"));
    }
 
    [Fact]
    public async Task TestInRawStringInterpolation_MultiLine_MultiBrace()
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """"
            var x = ${|#0:|}$"""
            {{$$}}
            """
            """"));
    }
 
    [Fact]
    public async Task TestInRawStringInterpolation_MultiLineIncomplete()
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """"
            var x = $"""
            {$$
            """"));
    }
 
    #region Collection expressions
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/70677")]
    public async Task TestInCollectionExpressions_BeforeFirstElementToVar()
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            var x = [$$
            """));
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/70677")]
    public async Task TestInCollectionExpressions_BeforeFirstElementToReturn()
    {
        await VerifyKeywordAsync(
            """
            class C
            {
                IEnumerable<string> M() => [$$
            }
            """);
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/70677")]
    public async Task TestInCollectionExpressions_AfterFirstElementToVar()
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            var x = [new object(), $$
            """));
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/70677")]
    public async Task TestInCollectionExpressions_AfterFirstElementToReturn()
    {
        await VerifyKeywordAsync(
            """
            class C
            {
                IEnumerable<string> M() => [string.Empty, $$
            }
            """);
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/70677")]
    public async Task TestInCollectionExpressions_SpreadBeforeFirstElementToReturn()
    {
        await VerifyKeywordAsync(
            """
            class C
            {
                IEnumerable<string> M() => [.. $$
            }
            """);
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/70677")]
    public async Task TestInCollectionExpressions_SpreadAfterFirstElementToReturn()
    {
        await VerifyKeywordAsync(
            """
            class C
            {
                IEnumerable<string> M() => [string.Empty, .. $$
            }
            """);
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/70677")]
    public async Task TestInCollectionExpressions_ParenAtFirstElementToReturn()
    {
        await VerifyKeywordAsync(
            """
            class C
            {
                IEnumerable<string> M() => [($$
            }
            """);
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/70677")]
    public async Task TestInCollectionExpressions_ParenAfterFirstElementToReturn()
    {
        await VerifyKeywordAsync(
            """
            class C
            {
                IEnumerable<string> M() => [string.Empty, ($$
            }
            """);
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/70677")]
    public async Task TestInCollectionExpressions_ParenSpreadAtFirstElementToReturn()
    {
        await VerifyKeywordAsync(
            """
            class C
            {
                IEnumerable<string> M() => [.. ($$
            }
            """);
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/70677")]
    public async Task TestInCollectionExpressions_ParenSpreadAfterFirstElementToReturn()
    {
        await VerifyKeywordAsync(
            """
            class C
            {
                IEnumerable<string> M() => [string.Empty, .. ($$
            }
            """);
    }
 
    #endregion
 
    [Fact]
    public async Task TestWithinExtension()
    {
        await VerifyAbsenceAsync(
            """
            static class C
            {
                extension(string s)
                {
                    $$
                }
            }
            """,
            CSharpNextParseOptions,
            CSharpNextScriptParseOptions);
    }
}
File: Recommendations\NewKeywordRecommenderTests.cs	Web Access
Project: src\src\EditorFeatures\CSharpTest2\Microsoft.CodeAnalysis.CSharp.EditorFeatures2.UnitTests.csproj (Microsoft.CodeAnalysis.CSharp.EditorFeatures2.UnitTests)