DiagnosticAnalyzerDriverTests.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;
using System.Collections.Generic;
using System.Collections.Immutable;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis.CodeActions;
using Microsoft.CodeAnalysis.CSharp;
using Microsoft.CodeAnalysis.CSharp.Test.Utilities;
using Microsoft.CodeAnalysis.Diagnostics;
using Microsoft.CodeAnalysis.Editor.UnitTests;
using Microsoft.CodeAnalysis.Editor.UnitTests.Diagnostics;
using Microsoft.CodeAnalysis.Editor.UnitTests.Workspaces;
using Microsoft.CodeAnalysis.Options;
using Microsoft.CodeAnalysis.PooledObjects;
using Microsoft.CodeAnalysis.Shared.Extensions;
using Microsoft.CodeAnalysis.Simplification;
using Microsoft.CodeAnalysis.Test.Utilities;
using Microsoft.CodeAnalysis.Text;
using Microsoft.CodeAnalysis.UnitTests.Diagnostics;
using Roslyn.Test.Utilities;
using Roslyn.Utilities;
using Xunit;
using static Roslyn.Test.Utilities.TestBase;
 
namespace Microsoft.CodeAnalysis.Editor.CSharp.UnitTests.Diagnostics.UserDiagnosticProviderEngine
{
    [UseExportProvider]
    public class DiagnosticAnalyzerDriverTests
    {
        private static readonly TestComposition s_compositionWithMockDiagnosticUpdateSourceRegistrationService = EditorTestCompositions.EditorFeatures
            .AddExcludedPartTypes(typeof(IDiagnosticUpdateSourceRegistrationService))
            .AddParts(typeof(MockDiagnosticUpdateSourceRegistrationService));
 
        [Fact]
        public async Task DiagnosticAnalyzerDriverAllInOne()
        {
            var source = TestResource.AllInOneCSharpCode;
 
            // AllInOneCSharpCode has no properties with initializers or named types with primary constructors.
            var symbolKindsWithNoCodeBlocks = new HashSet<SymbolKind>();
            symbolKindsWithNoCodeBlocks.Add(SymbolKind.Property);
            symbolKindsWithNoCodeBlocks.Add(SymbolKind.NamedType);
 
            var missingSyntaxNodes = new HashSet<SyntaxKind>();
            // https://github.com/dotnet/roslyn/issues/44682 - Add to all in one
            missingSyntaxNodes.Add(SyntaxKind.WithExpression);
            missingSyntaxNodes.Add(SyntaxKind.RecordDeclaration);
 
            var analyzer = new CSharpTrackingDiagnosticAnalyzer();
            using var workspace = TestWorkspace.CreateCSharp(source, TestOptions.Regular, composition: s_compositionWithMockDiagnosticUpdateSourceRegistrationService);
 
            var analyzerReference = new AnalyzerImageReference(ImmutableArray.Create<DiagnosticAnalyzer>(analyzer));
            var newSolution = workspace.CurrentSolution.WithAnalyzerReferences(new[] { analyzerReference })
                .Projects.Single().AddAdditionalDocument(name: "dummy.txt", text: "", filePath: "dummy.txt").Project.Solution;
            workspace.TryApplyChanges(newSolution);
 
            var document = workspace.CurrentSolution.Projects.Single().Documents.Single();
            AccessSupportedDiagnostics(analyzer);
            await DiagnosticProviderTestUtilities.GetAllDiagnosticsAsync(workspace, document, new TextSpan(0, document.GetTextAsync().Result.Length));
            analyzer.VerifyAllAnalyzerMembersWereCalled();
            analyzer.VerifyAnalyzeSymbolCalledForAllSymbolKinds();
            analyzer.VerifyAnalyzeNodeCalledForAllSyntaxKinds(missingSyntaxNodes);
            analyzer.VerifyOnCodeBlockCalledForAllSymbolAndMethodKinds(symbolKindsWithNoCodeBlocks, true);
        }
 
        [Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/908658")]
        public async Task DiagnosticAnalyzerDriverVsAnalyzerDriverOnCodeBlock()
        {
            var methodNames = new string[] { "Initialize", "AnalyzeCodeBlock" };
            var source = @"
[System.Obsolete]
class C
{
    int P { get; set; }
    delegate void A();
    delegate string F();
}
";
 
            var ideEngineAnalyzer = new CSharpTrackingDiagnosticAnalyzer();
            using (var ideEngineWorkspace = TestWorkspace.CreateCSharp(source, composition: s_compositionWithMockDiagnosticUpdateSourceRegistrationService))
            {
                var analyzerReference = new AnalyzerImageReference(ImmutableArray.Create<DiagnosticAnalyzer>(ideEngineAnalyzer));
                ideEngineWorkspace.TryApplyChanges(ideEngineWorkspace.CurrentSolution.WithAnalyzerReferences(new[] { analyzerReference }));
 
                var ideEngineDocument = ideEngineWorkspace.CurrentSolution.Projects.Single().Documents.Single();
                await DiagnosticProviderTestUtilities.GetAllDiagnosticsAsync(ideEngineWorkspace, ideEngineDocument, new TextSpan(0, ideEngineDocument.GetTextAsync().Result.Length));
                foreach (var method in methodNames)
                {
                    Assert.False(ideEngineAnalyzer.CallLog.Any(e => e.CallerName == method && e.MethodKind == MethodKind.DelegateInvoke && e.ReturnsVoid));
                    Assert.False(ideEngineAnalyzer.CallLog.Any(e => e.CallerName == method && e.MethodKind == MethodKind.DelegateInvoke && !e.ReturnsVoid));
                    Assert.True(ideEngineAnalyzer.CallLog.Any(e => e.CallerName == method && e.SymbolKind == SymbolKind.NamedType));
                    Assert.False(ideEngineAnalyzer.CallLog.Any(e => e.CallerName == method && e.SymbolKind == SymbolKind.Property));
                }
            }
 
            var compilerEngineAnalyzer = new CSharpTrackingDiagnosticAnalyzer();
            using var compilerEngineWorkspace = TestWorkspace.CreateCSharp(source, composition: s_compositionWithMockDiagnosticUpdateSourceRegistrationService);
            var compilerEngineCompilation = (CSharpCompilation)compilerEngineWorkspace.CurrentSolution.Projects.Single().GetRequiredCompilationAsync(CancellationToken.None).Result;
            compilerEngineCompilation.GetAnalyzerDiagnostics(new[] { compilerEngineAnalyzer });
            foreach (var method in methodNames)
            {
                Assert.False(compilerEngineAnalyzer.CallLog.Any(e => e.CallerName == method && e.MethodKind == MethodKind.DelegateInvoke && e.ReturnsVoid));
                Assert.False(compilerEngineAnalyzer.CallLog.Any(e => e.CallerName == method && e.MethodKind == MethodKind.DelegateInvoke && !e.ReturnsVoid));
                Assert.True(compilerEngineAnalyzer.CallLog.Any(e => e.CallerName == method && e.SymbolKind == SymbolKind.NamedType));
                Assert.False(compilerEngineAnalyzer.CallLog.Any(e => e.CallerName == method && e.SymbolKind == SymbolKind.Property));
            }
        }
 
        [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/759")]
        public async Task DiagnosticAnalyzerDriverIsSafeAgainstAnalyzerExceptions()
        {
            var source = TestResource.AllInOneCSharpCode;
 
            await ThrowingDiagnosticAnalyzer<SyntaxKind>.VerifyAnalyzerEngineIsSafeAgainstExceptionsAsync(async analyzer =>
            {
                using var workspace = TestWorkspace.CreateCSharp(source, TestOptions.Regular, composition: s_compositionWithMockDiagnosticUpdateSourceRegistrationService);
 
                var analyzerReference = new AnalyzerImageReference(ImmutableArray.Create(analyzer));
                workspace.TryApplyChanges(workspace.CurrentSolution.WithAnalyzerReferences(new[] { analyzerReference }));
 
                var document = workspace.CurrentSolution.Projects.Single().Documents.Single();
                return await DiagnosticProviderTestUtilities.GetAllDiagnosticsAsync(workspace, document, new TextSpan(0, document.GetTextAsync().Result.Length));
            });
        }
 
        [Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/908621")]
        public void DiagnosticServiceIsSafeAgainstAnalyzerExceptions_1()
        {
            var analyzer = new ThrowingDiagnosticAnalyzer<SyntaxKind>();
            analyzer.ThrowOn(typeof(DiagnosticAnalyzer).GetProperties().Single().Name);
            AccessSupportedDiagnostics(analyzer);
        }
 
        [Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/908621")]
        public void DiagnosticServiceIsSafeAgainstAnalyzerExceptions_2()
        {
            var analyzer = new ThrowingDoNotCatchDiagnosticAnalyzer<SyntaxKind>();
            analyzer.ThrowOn(typeof(DiagnosticAnalyzer).GetProperties().Single().Name);
            var exceptions = new List<Exception>();
            try
            {
                AccessSupportedDiagnostics(analyzer);
            }
            catch (Exception e)
            {
                exceptions.Add(e);
            }
 
            Assert.True(exceptions.Count == 0);
        }
 
        [Fact]
        public async Task AnalyzerOptionsArePassedToAllAnalyzers()
        {
            using var workspace = TestWorkspace.CreateCSharp(TestResource.AllInOneCSharpCode, TestOptions.Regular, composition: s_compositionWithMockDiagnosticUpdateSourceRegistrationService);
 
            var additionalDocId = DocumentId.CreateNewId(workspace.CurrentSolution.Projects.Single().Id);
            var additionalText = new TestAdditionalText("add.config", SourceText.From("random text"));
            var options = new AnalyzerOptions(ImmutableArray.Create<AdditionalText>(additionalText));
            var analyzer = new OptionsDiagnosticAnalyzer<SyntaxKind>(expectedOptions: options);
            var analyzerReference = new AnalyzerImageReference(ImmutableArray.Create<DiagnosticAnalyzer>(analyzer));
 
            workspace.TryApplyChanges(workspace.CurrentSolution
                .WithAnalyzerReferences(new[] { analyzerReference })
                .AddAdditionalDocument(additionalDocId, "add.config", additionalText.GetText()!));
 
            var sourceDocument = workspace.CurrentSolution.Projects.Single().Documents.Single();
            await DiagnosticProviderTestUtilities.GetAllDiagnosticsAsync(workspace, sourceDocument, new TextSpan(0, sourceDocument.GetTextAsync().Result.Length));
            analyzer.VerifyAnalyzerOptions();
        }
 
        private static void AccessSupportedDiagnostics(DiagnosticAnalyzer analyzer)
        {
            var diagnosticService = new HostDiagnosticAnalyzers(new[] { new AnalyzerImageReference(ImmutableArray.Create(analyzer)) });
            diagnosticService.GetDiagnosticDescriptorsPerReference(new DiagnosticAnalyzerInfoCache());
        }
 
        private class ThrowingDoNotCatchDiagnosticAnalyzer<TLanguageKindEnum> : ThrowingDiagnosticAnalyzer<TLanguageKindEnum>, IBuiltInAnalyzer where TLanguageKindEnum : struct
        {
            public CodeActionRequestPriority RequestPriority => CodeActionRequestPriority.Normal;
 
            public bool OpenFileOnly(SimplifierOptions? options) => false;
 
            public DiagnosticAnalyzerCategory GetAnalyzerCategory()
                => DiagnosticAnalyzerCategory.SyntaxTreeWithoutSemanticsAnalysis | DiagnosticAnalyzerCategory.SemanticDocumentAnalysis | DiagnosticAnalyzerCategory.ProjectAnalysis;
        }
 
        [Fact]
        public async Task AnalyzerCreatedAtCompilationLevelNeedNotBeCompilationAnalyzer()
        {
            var source = @"x";
 
            using var workspace = TestWorkspace.CreateCSharp(source, composition: s_compositionWithMockDiagnosticUpdateSourceRegistrationService);
 
            var analyzer = new CompilationAnalyzerWithSyntaxTreeAnalyzer();
            var analyzerReference = new AnalyzerImageReference(ImmutableArray.Create<DiagnosticAnalyzer>(analyzer));
            workspace.TryApplyChanges(workspace.CurrentSolution.WithAnalyzerReferences(new[] { analyzerReference }));
 
            var ideEngineDocument = workspace.CurrentSolution.Projects.Single().Documents.Single();
            var diagnostics = await DiagnosticProviderTestUtilities.GetAllDiagnosticsAsync(workspace, ideEngineDocument, new TextSpan(0, ideEngineDocument.GetTextAsync().Result.Length));
 
            var diagnosticsFromAnalyzer = diagnostics.Where(d => d.Id == "SyntaxDiagnostic");
 
            Assert.Equal(1, diagnosticsFromAnalyzer.Count());
        }
 
        private class CompilationAnalyzerWithSyntaxTreeAnalyzer : DiagnosticAnalyzer
        {
            private const string ID = "SyntaxDiagnostic";
 
            private static readonly DiagnosticDescriptor s_syntaxDiagnosticDescriptor =
                new DiagnosticDescriptor(ID, title: "Syntax", messageFormat: "Syntax", category: "Test", defaultSeverity: DiagnosticSeverity.Warning, isEnabledByDefault: true);
 
            public override ImmutableArray<DiagnosticDescriptor> SupportedDiagnostics
            {
                get
                {
                    return ImmutableArray.Create(s_syntaxDiagnosticDescriptor);
                }
            }
 
            public override void Initialize(AnalysisContext context)
                => context.RegisterCompilationStartAction(CreateAnalyzerWithinCompilation);
 
            public void CreateAnalyzerWithinCompilation(CompilationStartAnalysisContext context)
                => context.RegisterSyntaxTreeAction(SyntaxTreeAnalyzer.AnalyzeSyntaxTree);
 
            private class SyntaxTreeAnalyzer
            {
                public static void AnalyzeSyntaxTree(SyntaxTreeAnalysisContext context)
                    => context.ReportDiagnostic(Diagnostic.Create(s_syntaxDiagnosticDescriptor, context.Tree.GetRoot().GetFirstToken().GetLocation()));
            }
        }
 
        [Fact]
        public async Task CodeBlockAnalyzersOnlyAnalyzeExecutableCode()
        {
            var source = @"
using System;
class C
{
    void F(int x = 0)
    {
        Console.WriteLine(0);
    }
}
";
 
            var analyzer = new CodeBlockAnalyzerFactory();
            using (var ideEngineWorkspace = TestWorkspace.CreateCSharp(source, composition: s_compositionWithMockDiagnosticUpdateSourceRegistrationService))
            {
                var analyzerReference = new AnalyzerImageReference(ImmutableArray.Create<DiagnosticAnalyzer>(analyzer));
                ideEngineWorkspace.TryApplyChanges(ideEngineWorkspace.CurrentSolution.WithAnalyzerReferences(new[] { analyzerReference }));
 
                var ideEngineDocument = ideEngineWorkspace.CurrentSolution.Projects.Single().Documents.Single();
                var diagnostics = await DiagnosticProviderTestUtilities.GetAllDiagnosticsAsync(ideEngineWorkspace, ideEngineDocument, new TextSpan(0, ideEngineDocument.GetTextAsync().Result.Length));
                var diagnosticsFromAnalyzer = diagnostics.Where(d => d.Id == CodeBlockAnalyzerFactory.Descriptor.Id);
                Assert.Equal(2, diagnosticsFromAnalyzer.Count());
            }
 
            source = @"
using System;
class C
{
    void F(int x = 0, int y = 1, int z = 2)
    {
        Console.WriteLine(0);
    }
}
";
 
            using (var compilerEngineWorkspace = TestWorkspace.CreateCSharp(source, composition: s_compositionWithMockDiagnosticUpdateSourceRegistrationService))
            {
                var compilerEngineCompilation = (CSharpCompilation)compilerEngineWorkspace.CurrentSolution.Projects.Single().GetRequiredCompilationAsync(CancellationToken.None).Result;
                var diagnostics = compilerEngineCompilation.GetAnalyzerDiagnostics(new[] { analyzer });
                var diagnosticsFromAnalyzer = diagnostics.Where(d => d.Id == CodeBlockAnalyzerFactory.Descriptor.Id);
                Assert.Equal(4, diagnosticsFromAnalyzer.Count());
            }
        }
 
        private class CodeBlockAnalyzerFactory : DiagnosticAnalyzer
        {
            public static DiagnosticDescriptor Descriptor = DescriptorFactory.CreateSimpleDescriptor("DummyDiagnostic");
 
            public override ImmutableArray<DiagnosticDescriptor> SupportedDiagnostics
            {
                get
                {
                    return ImmutableArray.Create(Descriptor);
                }
            }
 
            public override void Initialize(AnalysisContext context)
                => context.RegisterCodeBlockStartAction<SyntaxKind>(CreateAnalyzerWithinCodeBlock);
 
            public void CreateAnalyzerWithinCodeBlock(CodeBlockStartAnalysisContext<SyntaxKind> context)
            {
                var blockAnalyzer = new CodeBlockAnalyzer();
                context.RegisterCodeBlockEndAction(CodeBlockAnalyzer.AnalyzeCodeBlock);
                context.RegisterSyntaxNodeAction(CodeBlockAnalyzer.AnalyzeNode, CodeBlockAnalyzer.SyntaxKindsOfInterest.ToArray());
            }
 
            private class CodeBlockAnalyzer
            {
                public static ImmutableArray<SyntaxKind> SyntaxKindsOfInterest
                {
                    get
                    {
                        return ImmutableArray.Create(SyntaxKind.MethodDeclaration, SyntaxKind.ExpressionStatement, SyntaxKind.EqualsValueClause);
                    }
                }
 
                public static void AnalyzeCodeBlock(CodeBlockAnalysisContext _)
                {
                }
 
                public static void AnalyzeNode(SyntaxNodeAnalysisContext context)
                {
                    // Ensure only executable nodes are analyzed.
                    Assert.NotEqual(SyntaxKind.MethodDeclaration, context.Node.Kind());
                    context.ReportDiagnostic(Diagnostic.Create(Descriptor, context.Node.GetLocation()));
                }
            }
        }
 
        [Fact]
        public async Task TestDiagnosticSpan()
        {
            var source = @"// empty code";
 
            var analyzer = new InvalidSpanAnalyzer();
            using var compilerEngineWorkspace = TestWorkspace.CreateCSharp(source);
            var compilerEngineCompilation = (CSharpCompilation)(await compilerEngineWorkspace.CurrentSolution.Projects.Single().GetRequiredCompilationAsync(CancellationToken.None));
 
            var diagnostics = compilerEngineCompilation.GetAnalyzerDiagnostics(new[] { analyzer });
            AssertEx.Any(diagnostics, d => d.Id == DocumentAnalysisExecutor.AnalyzerExceptionDiagnosticId);
        }
 
        private class InvalidSpanAnalyzer : DiagnosticAnalyzer
        {
            public static DiagnosticDescriptor Descriptor = DescriptorFactory.CreateSimpleDescriptor("DummyDiagnostic");
 
            public override ImmutableArray<DiagnosticDescriptor> SupportedDiagnostics
                => ImmutableArray.Create(Descriptor);
 
            public override void Initialize(AnalysisContext context)
                => context.RegisterSyntaxTreeAction(Analyze);
 
            private void Analyze(SyntaxTreeAnalysisContext context)
                => context.ReportDiagnostic(Diagnostic.Create(Descriptor, Location.Create(context.Tree, TextSpan.FromBounds(1000, 2000))));
        }
 
        [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/18818")]
        public async Task TestNuGetAndVsixAnalyzer_ReportsSameId()
        {
            // NuGet and VSIX analyzer reporting same diagnostic IDs.
            var reportedDiagnosticIds = new[] { "A", "B", "C" };
            var nugetAnalyzer = new NuGetAnalyzer(reportedDiagnosticIds);
            var vsixAnalyzer = new VsixAnalyzer(reportedDiagnosticIds);
            Assert.Equal(reportedDiagnosticIds, nugetAnalyzer.SupportedDiagnostics.Select(d => d.Id).Order());
            Assert.Equal(reportedDiagnosticIds, vsixAnalyzer.SupportedDiagnostics.Select(d => d.Id).Order());
 
            // No NuGet or VSIX analyzer - no diagnostics.
            await TestNuGetAndVsixAnalyzerCoreAsync(
                nugetAnalyzer: null,
                expectedNugetAnalyzerExecuted: false,
                vsixAnalyzer: null,
                expectedVsixAnalyzerExecuted: false);
 
            // Only NuGet analyzer - verify diagnostics.
            await TestNuGetAndVsixAnalyzerCoreAsync(
                nugetAnalyzer,
                expectedNugetAnalyzerExecuted: true,
                vsixAnalyzer: null,
                expectedVsixAnalyzerExecuted: false,
                new[]
                {
                    (Diagnostic("A", "Class").WithLocation(1, 7), nameof(NuGetAnalyzer)),
                    (Diagnostic("B", "Class").WithLocation(1, 7), nameof(NuGetAnalyzer)),
                    (Diagnostic("C", "Class").WithLocation(1, 7), nameof(NuGetAnalyzer)),
                });
 
            // Only VSIX analyzer - verify diagnostics.
            await TestNuGetAndVsixAnalyzerCoreAsync(
                nugetAnalyzer: null,
                expectedNugetAnalyzerExecuted: false,
                vsixAnalyzer,
                expectedVsixAnalyzerExecuted: true,
                new[]
                {
                    (Diagnostic("A", "Class").WithLocation(1, 7), nameof(VsixAnalyzer)),
                    (Diagnostic("B", "Class").WithLocation(1, 7), nameof(VsixAnalyzer)),
                    (Diagnostic("C", "Class").WithLocation(1, 7), nameof(VsixAnalyzer)),
                });
 
            // Both NuGet and VSIX analyzer, verify the following:
            //   1) No duplicate diagnostics
            //   2) Only NuGet analyzer executes
            await TestNuGetAndVsixAnalyzerCoreAsync(
                nugetAnalyzer,
                expectedNugetAnalyzerExecuted: true,
                vsixAnalyzer,
                expectedVsixAnalyzerExecuted: false,
                new[]
                {
                    (Diagnostic("A", "Class").WithLocation(1, 7), nameof(NuGetAnalyzer)),
                    (Diagnostic("B", "Class").WithLocation(1, 7), nameof(NuGetAnalyzer)),
                    (Diagnostic("C", "Class").WithLocation(1, 7), nameof(NuGetAnalyzer)),
                });
        }
 
        [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/18818")]
        public async Task TestNuGetAndVsixAnalyzer_NuGetAnalyzerReportsSubsetOfVsixAnalyzerIds()
        {
            // NuGet analyzer reports subset of diagnostic IDs reported by VSIX analyzer.
            var nugetAnalyzerDiagnosticIds = new[] { "B" };
            var vsixAnalyzerDiagnosticIds = new[] { "A", "B", "C" };
            var nugetAnalyzer = new NuGetAnalyzer(nugetAnalyzerDiagnosticIds);
            var vsixAnalyzer = new VsixAnalyzer(vsixAnalyzerDiagnosticIds);
            Assert.Equal(nugetAnalyzerDiagnosticIds, nugetAnalyzer.SupportedDiagnostics.Select(d => d.Id).Order());
            Assert.Equal(vsixAnalyzerDiagnosticIds, vsixAnalyzer.SupportedDiagnostics.Select(d => d.Id).Order());
 
            // Only NuGet analyzer - verify diagnostics.
            await TestNuGetAndVsixAnalyzerCoreAsync(
                nugetAnalyzer,
                expectedNugetAnalyzerExecuted: true,
                vsixAnalyzer: null,
                expectedVsixAnalyzerExecuted: false,
                new[]
                {
                    (Diagnostic("B", "Class").WithLocation(1, 7), nameof(NuGetAnalyzer))
                });
 
            // Only VSIX analyzer - verify diagnostics.
            await TestNuGetAndVsixAnalyzerCoreAsync(
                nugetAnalyzer: null,
                expectedNugetAnalyzerExecuted: false,
                vsixAnalyzer,
                expectedVsixAnalyzerExecuted: true,
                new[]
                {
                    (Diagnostic("A", "Class").WithLocation(1, 7), nameof(VsixAnalyzer)),
                    (Diagnostic("B", "Class").WithLocation(1, 7), nameof(VsixAnalyzer)),
                    (Diagnostic("C", "Class").WithLocation(1, 7), nameof(VsixAnalyzer)),
                });
 
            // Both NuGet and VSIX analyzer, verify the following:
            //   1) No duplicate diagnostics
            //   2) Both NuGet and Vsix analyzers execute
            //   3) Appropriate diagnostic filtering is done - NuGet analyzer reported diagnostic IDs are filtered from Vsix analyzer execution.
            await TestNuGetAndVsixAnalyzerCoreAsync(
                nugetAnalyzer,
                expectedNugetAnalyzerExecuted: true,
                vsixAnalyzer,
                expectedVsixAnalyzerExecuted: true,
                new[]
                {
                    (Diagnostic("A", "Class").WithLocation(1, 7), nameof(VsixAnalyzer)),
                    (Diagnostic("B", "Class").WithLocation(1, 7), nameof(NuGetAnalyzer)),
                    (Diagnostic("C", "Class").WithLocation(1, 7), nameof(VsixAnalyzer)),
                });
        }
 
        [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/18818")]
        public async Task TestNuGetAndVsixAnalyzer_VsixAnalyzerReportsSubsetOfNuGetAnalyzerIds()
        {
            // VSIX analyzer reports subset of diagnostic IDs reported by NuGet analyzer.
            var nugetAnalyzerDiagnosticIds = new[] { "A", "B", "C" };
            var vsixAnalyzerDiagnosticIds = new[] { "B" };
            var nugetAnalyzer = new NuGetAnalyzer(nugetAnalyzerDiagnosticIds);
            var vsixAnalyzer = new VsixAnalyzer(vsixAnalyzerDiagnosticIds);
            Assert.Equal(nugetAnalyzerDiagnosticIds, nugetAnalyzer.SupportedDiagnostics.Select(d => d.Id).Order());
            Assert.Equal(vsixAnalyzerDiagnosticIds, vsixAnalyzer.SupportedDiagnostics.Select(d => d.Id).Order());
 
            // Only NuGet analyzer - verify diagnostics.
            await TestNuGetAndVsixAnalyzerCoreAsync(
                nugetAnalyzer,
                expectedNugetAnalyzerExecuted: true,
                vsixAnalyzer: null,
                expectedVsixAnalyzerExecuted: false,
                new[]
                {
                    (Diagnostic("A", "Class").WithLocation(1, 7), nameof(NuGetAnalyzer)),
                    (Diagnostic("B", "Class").WithLocation(1, 7), nameof(NuGetAnalyzer)),
                    (Diagnostic("C", "Class").WithLocation(1, 7), nameof(NuGetAnalyzer))
                });
 
            // Only VSIX analyzer - verify diagnostics.
            await TestNuGetAndVsixAnalyzerCoreAsync(
                nugetAnalyzer: null,
                expectedNugetAnalyzerExecuted: false,
                vsixAnalyzer,
                expectedVsixAnalyzerExecuted: true,
                new[]
                {
                    (Diagnostic("B", "Class").WithLocation(1, 7), nameof(VsixAnalyzer))
                });
 
            // Both NuGet and VSIX analyzer, verify the following:
            //   1) No duplicate diagnostics
            //   2) Only NuGet analyzer executes
            await TestNuGetAndVsixAnalyzerCoreAsync(
                nugetAnalyzer,
                expectedNugetAnalyzerExecuted: true,
                vsixAnalyzer,
                expectedVsixAnalyzerExecuted: false,
                new[]
                {
                    (Diagnostic("A", "Class").WithLocation(1, 7), nameof(NuGetAnalyzer)),
                    (Diagnostic("B", "Class").WithLocation(1, 7), nameof(NuGetAnalyzer)),
                    (Diagnostic("C", "Class").WithLocation(1, 7), nameof(NuGetAnalyzer)),
                });
        }
 
        [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/18818")]
        public async Task TestNuGetAndVsixAnalyzer_MultipleNuGetAnalyzersCollectivelyReportSameIds()
        {
            // Multiple NuGet analyzers collectively report same diagnostic IDs reported by Vsix analyzer.
            var firstNugetAnalyzerDiagnosticIds = new[] { "B" };
            var secondNugetAnalyzerDiagnosticIds = new[] { "A", "C" };
            var vsixAnalyzerDiagnosticIds = new[] { "A", "B", "C" };
            var firstNugetAnalyzer = new NuGetAnalyzer(firstNugetAnalyzerDiagnosticIds);
            var secondNugetAnalyzer = new NuGetAnalyzer(secondNugetAnalyzerDiagnosticIds);
            var vsixAnalyzer = new VsixAnalyzer(vsixAnalyzerDiagnosticIds);
            Assert.Equal(firstNugetAnalyzerDiagnosticIds, firstNugetAnalyzer.SupportedDiagnostics.Select(d => d.Id).Order());
            Assert.Equal(secondNugetAnalyzerDiagnosticIds, secondNugetAnalyzer.SupportedDiagnostics.Select(d => d.Id).Order());
            Assert.Equal(vsixAnalyzerDiagnosticIds, vsixAnalyzer.SupportedDiagnostics.Select(d => d.Id).Order());
 
            // All NuGet analyzers and no Vsix analyzer, verify the following:
            //   1) No duplicate diagnostics
            //   2) Only NuGet analyzers execute
            await TestNuGetAndVsixAnalyzerCoreAsync(
                nugetAnalyzers: ImmutableArray.Create(firstNugetAnalyzer, secondNugetAnalyzer),
                expectedNugetAnalyzersExecuted: true,
                vsixAnalyzers: ImmutableArray<VsixAnalyzer>.Empty,
                expectedVsixAnalyzersExecuted: false,
                nugetSuppressors: ImmutableArray<NuGetSuppressor>.Empty,
                expectedNugetSuppressorsExecuted: false,
                vsixSuppressors: ImmutableArray<VsixSuppressor>.Empty,
                expectedVsixSuppressorsExecuted: false,
                new[]
                {
                    (Diagnostic("A", "Class").WithLocation(1, 7), nameof(NuGetAnalyzer)),
                    (Diagnostic("B", "Class").WithLocation(1, 7), nameof(NuGetAnalyzer)),
                    (Diagnostic("C", "Class").WithLocation(1, 7), nameof(NuGetAnalyzer))
                });
 
            // All NuGet analyzers and Vsix analyzer, verify the following:
            //   1) No duplicate diagnostics
            //   2) Only NuGet analyzers execute
            await TestNuGetAndVsixAnalyzerCoreAsync(
                nugetAnalyzers: ImmutableArray.Create(firstNugetAnalyzer, secondNugetAnalyzer),
                expectedNugetAnalyzersExecuted: true,
                vsixAnalyzers: ImmutableArray.Create(vsixAnalyzer),
                expectedVsixAnalyzersExecuted: false,
                nugetSuppressors: ImmutableArray<NuGetSuppressor>.Empty,
                expectedNugetSuppressorsExecuted: false,
                vsixSuppressors: ImmutableArray<VsixSuppressor>.Empty,
                expectedVsixSuppressorsExecuted: false,
                new[]
                {
                    (Diagnostic("A", "Class").WithLocation(1, 7), nameof(NuGetAnalyzer)),
                    (Diagnostic("B", "Class").WithLocation(1, 7), nameof(NuGetAnalyzer)),
                    (Diagnostic("C", "Class").WithLocation(1, 7), nameof(NuGetAnalyzer))
                });
 
            // Subset of NuGet analyzers and Vsix analyzer, verify the following:
            //   1) No duplicate diagnostics
            //   2) Both NuGet and Vsix analyzers execute
            //   3) Appropriate diagnostic filtering is done - NuGet analyzer reported diagnostic IDs are filtered from Vsix analyzer execution.
            await TestNuGetAndVsixAnalyzerCoreAsync(
                nugetAnalyzers: ImmutableArray.Create(firstNugetAnalyzer),
                expectedNugetAnalyzersExecuted: true,
                vsixAnalyzers: ImmutableArray.Create(vsixAnalyzer),
                expectedVsixAnalyzersExecuted: true,
                nugetSuppressors: ImmutableArray<NuGetSuppressor>.Empty,
                expectedNugetSuppressorsExecuted: false,
                vsixSuppressors: ImmutableArray<VsixSuppressor>.Empty,
                expectedVsixSuppressorsExecuted: false,
                new[]
                {
                    (Diagnostic("A", "Class").WithLocation(1, 7), nameof(VsixAnalyzer)),
                    (Diagnostic("B", "Class").WithLocation(1, 7), nameof(NuGetAnalyzer)),
                    (Diagnostic("C", "Class").WithLocation(1, 7), nameof(VsixAnalyzer))
                });
        }
 
        [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/46942")]
        public async Task TestNuGetAndVsixAnalyzer_SuppressorSuppressesVsixAnalyzer()
        {
            // Multiple NuGet analyzers do not overlap with the VSIX analyzer or suppressor
            var firstNugetAnalyzerDiagnosticIds = new[] { "A" };
            var secondNugetAnalyzerDiagnosticIds = new[] { "B", "C" };
            var vsixAnalyzerDiagnosticIds = new[] { "X", "Y", "Z" };
            var firstNugetAnalyzer = new NuGetAnalyzer(firstNugetAnalyzerDiagnosticIds);
            var secondNugetAnalyzer = new NuGetAnalyzer(secondNugetAnalyzerDiagnosticIds);
            var vsixAnalyzer = new VsixAnalyzer(vsixAnalyzerDiagnosticIds);
            var vsixSuppressor = new VsixSuppressor(vsixAnalyzerDiagnosticIds);
            var nugetSuppressor = new NuGetSuppressor(vsixAnalyzerDiagnosticIds);
            var partialNugetSuppressor = new NuGetSuppressor(new[] { "Y", "Z" });
 
            Assert.Equal(firstNugetAnalyzerDiagnosticIds, firstNugetAnalyzer.SupportedDiagnostics.Select(d => d.Id).Order());
            Assert.Equal(secondNugetAnalyzerDiagnosticIds, secondNugetAnalyzer.SupportedDiagnostics.Select(d => d.Id).Order());
            Assert.Equal(vsixAnalyzerDiagnosticIds, vsixAnalyzer.SupportedDiagnostics.Select(d => d.Id).Order());
            Assert.Equal(vsixAnalyzerDiagnosticIds, vsixSuppressor.SupportedSuppressions.Select(s => s.SuppressedDiagnosticId).Order());
            Assert.Equal(vsixAnalyzerDiagnosticIds, nugetSuppressor.SupportedSuppressions.Select(s => s.SuppressedDiagnosticId).Order());
 
            // Verify the following:
            //   1) No duplicate diagnostics
            //   2) The VSIX diagnostics are suppressed by the VSIX suppressor
            await TestNuGetAndVsixAnalyzerCoreAsync(
                nugetAnalyzers: ImmutableArray<NuGetAnalyzer>.Empty,
                expectedNugetAnalyzersExecuted: false,
                vsixAnalyzers: ImmutableArray.Create(vsixAnalyzer),
                expectedVsixAnalyzersExecuted: true,
                nugetSuppressors: ImmutableArray<NuGetSuppressor>.Empty,
                expectedNugetSuppressorsExecuted: false,
                vsixSuppressors: ImmutableArray.Create(vsixSuppressor),
                expectedVsixSuppressorsExecuted: true,
                new[]
                {
                    (Diagnostic("X", "Class", isSuppressed: true).WithLocation(1, 7), nameof(VsixAnalyzer)),
                    (Diagnostic("Y", "Class", isSuppressed: true).WithLocation(1, 7), nameof(VsixAnalyzer)),
                    (Diagnostic("Z", "Class", isSuppressed: true).WithLocation(1, 7), nameof(VsixAnalyzer))
                });
 
            // All without overlap, the VSIX analyzer and suppressor still work when nuget analyzers are present:
            //   1) No duplicate diagnostics
            //   2) All analyzers execute
            //   3) VSIX diagnostics are suppressed.
            await TestNuGetAndVsixAnalyzerCoreAsync(
                nugetAnalyzers: ImmutableArray.Create(firstNugetAnalyzer, secondNugetAnalyzer),
                expectedNugetAnalyzersExecuted: true,
                vsixAnalyzers: ImmutableArray.Create(vsixAnalyzer),
                expectedVsixAnalyzersExecuted: true,
                nugetSuppressors: ImmutableArray<NuGetSuppressor>.Empty,
                expectedNugetSuppressorsExecuted: false,
                vsixSuppressors: ImmutableArray.Create(vsixSuppressor),
                expectedVsixSuppressorsExecuted: true,
                new[]
                {
                    (Diagnostic("A", "Class").WithLocation(1, 7), nameof(NuGetAnalyzer)),
                    (Diagnostic("B", "Class").WithLocation(1, 7), nameof(NuGetAnalyzer)),
                    (Diagnostic("C", "Class").WithLocation(1, 7), nameof(NuGetAnalyzer)),
                    (Diagnostic("X", "Class", isSuppressed: true).WithLocation(1, 7), nameof(VsixAnalyzer)),
                    (Diagnostic("Y", "Class", isSuppressed: true).WithLocation(1, 7), nameof(VsixAnalyzer)),
                    (Diagnostic("Z", "Class", isSuppressed: true).WithLocation(1, 7), nameof(VsixAnalyzer))
                });
 
            // All without overlap, verify the following:
            //   1) No duplicate diagnostics
            //   2) Both NuGet and Vsix analyzers execute
            //   3) Appropriate diagnostic filtering is done - Nuget suppressor suppresses VSIX analyzer.
            await TestNuGetAndVsixAnalyzerCoreAsync(
                nugetAnalyzers: ImmutableArray.Create(firstNugetAnalyzer),
                expectedNugetAnalyzersExecuted: true,
                vsixAnalyzers: ImmutableArray.Create(vsixAnalyzer),
                expectedVsixAnalyzersExecuted: true,
                nugetSuppressors: ImmutableArray.Create(nugetSuppressor),
                expectedNugetSuppressorsExecuted: true,
                vsixSuppressors: ImmutableArray<VsixSuppressor>.Empty,
                expectedVsixSuppressorsExecuted: false,
                new[]
                {
                    (Diagnostic("A", "Class").WithLocation(1, 7), nameof(NuGetAnalyzer)),
                    (Diagnostic("X", "Class", isSuppressed: true).WithLocation(1, 7), nameof(VsixAnalyzer)),
                    (Diagnostic("Y", "Class", isSuppressed: true).WithLocation(1, 7), nameof(VsixAnalyzer)),
                    (Diagnostic("Z", "Class", isSuppressed: true).WithLocation(1, 7), nameof(VsixAnalyzer))
                });
 
            // Suppressors with duplicate support for VsixAnalyzer, but not 100% overlap. Verify the following:
            //   1) No duplicate diagnostics
            //   2) Both NuGet and Vsix analyzers execute
            //   3) Only Nuget suppressor executes
            //   4) Appropriate diagnostic filtering is done - Nuget suppressor suppresses VSIX analyzer.
            await TestNuGetAndVsixAnalyzerCoreAsync(
                nugetAnalyzers: ImmutableArray.Create(firstNugetAnalyzer),
                expectedNugetAnalyzersExecuted: true,
                vsixAnalyzers: ImmutableArray.Create(vsixAnalyzer),
                expectedVsixAnalyzersExecuted: true,
                nugetSuppressors: ImmutableArray.Create(partialNugetSuppressor),
                expectedNugetSuppressorsExecuted: true,
                vsixSuppressors: ImmutableArray.Create(vsixSuppressor),
                expectedVsixSuppressorsExecuted: false,
                new[]
                {
                    (Diagnostic("A", "Class").WithLocation(1, 7), nameof(NuGetAnalyzer)),
                    (Diagnostic("X", "Class", isSuppressed: false).WithLocation(1, 7), nameof(VsixAnalyzer)),
                    (Diagnostic("Y", "Class", isSuppressed: true).WithLocation(1, 7), nameof(VsixAnalyzer)),
                    (Diagnostic("Z", "Class", isSuppressed: true).WithLocation(1, 7), nameof(VsixAnalyzer))
                });
 
            // Suppressors with duplicate support for VsixAnalyzer, with 100% overlap. Verify the following:
            //   1) No duplicate diagnostics
            //   2) Both NuGet and Vsix analyzers execute
            //   3) Only Nuget suppressor executes
            //   4) Appropriate diagnostic filtering is done - Nuget suppressor suppresses VSIX analyzer.
            await TestNuGetAndVsixAnalyzerCoreAsync(
                nugetAnalyzers: ImmutableArray.Create(firstNugetAnalyzer),
                expectedNugetAnalyzersExecuted: true,
                vsixAnalyzers: ImmutableArray.Create(vsixAnalyzer),
                expectedVsixAnalyzersExecuted: true,
                nugetSuppressors: ImmutableArray.Create(nugetSuppressor),
                expectedNugetSuppressorsExecuted: true,
                vsixSuppressors: ImmutableArray.Create(vsixSuppressor),
                expectedVsixSuppressorsExecuted: false,
                new[]
                {
                    (Diagnostic("A", "Class").WithLocation(1, 7), nameof(NuGetAnalyzer)),
                    (Diagnostic("X", "Class", isSuppressed: true).WithLocation(1, 7), nameof(VsixAnalyzer)),
                    (Diagnostic("Y", "Class", isSuppressed: true).WithLocation(1, 7), nameof(VsixAnalyzer)),
                    (Diagnostic("Z", "Class", isSuppressed: true).WithLocation(1, 7), nameof(VsixAnalyzer))
                });
        }
 
        private static Task TestNuGetAndVsixAnalyzerCoreAsync(
            NuGetAnalyzer? nugetAnalyzer,
            bool expectedNugetAnalyzerExecuted,
            VsixAnalyzer? vsixAnalyzer,
            bool expectedVsixAnalyzerExecuted,
            params (DiagnosticDescription diagnostic, string message)[] expectedDiagnostics)
            => TestNuGetAndVsixAnalyzerCoreAsync(
                nugetAnalyzer != null ? ImmutableArray.Create(nugetAnalyzer) : ImmutableArray<NuGetAnalyzer>.Empty,
                expectedNugetAnalyzerExecuted,
                vsixAnalyzer != null ? ImmutableArray.Create(vsixAnalyzer) : ImmutableArray<VsixAnalyzer>.Empty,
                expectedVsixAnalyzerExecuted,
                ImmutableArray<NuGetSuppressor>.Empty,
                false,
                ImmutableArray<VsixSuppressor>.Empty,
                false,
                expectedDiagnostics);
 
        private static async Task TestNuGetAndVsixAnalyzerCoreAsync(
            ImmutableArray<NuGetAnalyzer> nugetAnalyzers,
            bool expectedNugetAnalyzersExecuted,
            ImmutableArray<VsixAnalyzer> vsixAnalyzers,
            bool expectedVsixAnalyzersExecuted,
            ImmutableArray<NuGetSuppressor> nugetSuppressors,
            bool expectedNugetSuppressorsExecuted,
            ImmutableArray<VsixSuppressor> vsixSuppressors,
            bool expectedVsixSuppressorsExecuted,
            params (DiagnosticDescription diagnostic, string message)[] expectedDiagnostics)
        {
            // First clear out the analyzer state for all analyzers.
            foreach (var nugetAnalyzer in nugetAnalyzers)
            {
                nugetAnalyzer.SymbolActionInvoked = false;
            }
 
            foreach (var vsixAnalyzer in vsixAnalyzers)
            {
                vsixAnalyzer.SymbolActionInvoked = false;
            }
 
            foreach (var nugetSuppressor in nugetSuppressors)
            {
                nugetSuppressor.SuppressorInvoked = false;
            }
 
            foreach (var vsixSuppressor in vsixSuppressors)
            {
                vsixSuppressor.SuppressorInvoked = false;
            }
 
            using var workspace = TestWorkspace.CreateCSharp("class Class { }", TestOptions.Regular, composition: s_compositionWithMockDiagnosticUpdateSourceRegistrationService);
            var vsixAnalyzerReferences = new List<DiagnosticAnalyzer>(vsixAnalyzers.CastArray<DiagnosticAnalyzer>());
            vsixAnalyzerReferences.AddRange(vsixSuppressors.CastArray<DiagnosticAnalyzer>());
 
            Assert.True(workspace.TryApplyChanges(workspace.CurrentSolution.WithAnalyzerReferences(new[]
            {
                new AnalyzerImageReference(vsixAnalyzerReferences.ToImmutableArray())
            })));
 
            var project = workspace.CurrentSolution.Projects.Single();
 
            var nugetAnalyzerReferences = new List<DiagnosticAnalyzer>();
            if (!nugetAnalyzers.IsEmpty)
            {
                nugetAnalyzerReferences.AddRange(nugetAnalyzers.As<DiagnosticAnalyzer>());
            }
 
            if (!nugetSuppressors.IsEmpty)
            {
                nugetAnalyzerReferences.AddRange(nugetSuppressors.As<DiagnosticAnalyzer>());
            }
 
            if (nugetAnalyzerReferences.Count > 0)
            {
                project = project.WithAnalyzerReferences(new[] { new AnalyzerImageReference(nugetAnalyzerReferences.ToImmutableArray()) });
            }
 
            var document = project.Documents.Single();
            var root = await document.GetRequiredSyntaxRootAsync(CancellationToken.None);
 
            var diagnostics = (await DiagnosticProviderTestUtilities.GetAllDiagnosticsAsync(workspace, document, root.FullSpan, includeSuppressedDiagnostics: true))
                .OrderBy(d => d.Id).ToImmutableArray();
 
            diagnostics.Verify(expectedDiagnostics.Select(d => d.diagnostic).ToArray());
 
            var index = 0;
            foreach (var (d, expectedMessage) in expectedDiagnostics)
            {
                Assert.Equal(expectedMessage, diagnostics[index].GetMessage());
                Assert.Equal(d.IsSuppressed, diagnostics[index].IsSuppressed);
                index++;
            }
 
            foreach (var nugetAnalyzer in nugetAnalyzers)
            {
                Assert.Equal(expectedNugetAnalyzersExecuted, nugetAnalyzer.SymbolActionInvoked);
            }
 
            foreach (var vsixAnalyzer in vsixAnalyzers)
            {
                Assert.Equal(expectedVsixAnalyzersExecuted, vsixAnalyzer.SymbolActionInvoked);
            }
 
            foreach (var nugetSuppressor in nugetSuppressors)
            {
                Assert.Equal(expectedNugetSuppressorsExecuted, nugetSuppressor.SuppressorInvoked);
            }
 
            foreach (var vsixSuppressor in vsixSuppressors)
            {
                Assert.Equal(expectedVsixSuppressorsExecuted, vsixSuppressor.SuppressorInvoked);
            }
        }
 
        [DiagnosticAnalyzer(LanguageNames.CSharp, LanguageNames.VisualBasic)]
        private sealed class NuGetAnalyzer : AbstractNuGetOrVsixAnalyzer
        {
            public NuGetAnalyzer(string[] reportedIds)
                : base(nameof(NuGetAnalyzer), reportedIds)
            {
            }
        }
 
        [DiagnosticAnalyzer(LanguageNames.CSharp, LanguageNames.VisualBasic)]
        private sealed class VsixAnalyzer : AbstractNuGetOrVsixAnalyzer
        {
            public VsixAnalyzer(string[] reportedIds)
                : base(nameof(VsixAnalyzer), reportedIds)
            {
            }
        }
 
        private abstract class AbstractNuGetOrVsixAnalyzer : DiagnosticAnalyzer
        {
            protected AbstractNuGetOrVsixAnalyzer(string analyzerName, params string[] reportedIds)
                => SupportedDiagnostics = CreateSupportedDiagnostics(analyzerName, reportedIds);
 
            private static ImmutableArray<DiagnosticDescriptor> CreateSupportedDiagnostics(string analyzerName, string[] reportedIds)
            {
                var builder = ArrayBuilder<DiagnosticDescriptor>.GetInstance(reportedIds.Length);
                foreach (var id in reportedIds)
                {
                    var descriptor = new DiagnosticDescriptor(id, "Title", messageFormat: analyzerName, "Category", DiagnosticSeverity.Warning, isEnabledByDefault: true);
                    builder.Add(descriptor);
                }
 
                return builder.ToImmutableAndFree();
            }
 
            public bool SymbolActionInvoked { get; set; }
            public sealed override ImmutableArray<DiagnosticDescriptor> SupportedDiagnostics { get; }
            public sealed override void Initialize(AnalysisContext context)
                => context.RegisterSymbolAction(OnSymbol, SymbolKind.NamedType);
 
            private void OnSymbol(SymbolAnalysisContext context)
            {
                SymbolActionInvoked = true;
                foreach (var descriptor in SupportedDiagnostics)
                {
                    var diagnostic = Diagnostic.Create(descriptor, context.Symbol.Locations[0]);
                    context.ReportDiagnostic(diagnostic);
                }
            }
        }
 
        private sealed class NuGetSuppressor : AbstractNugetOrVsixSuppressor
        {
            public NuGetSuppressor(string[] reportIds)
                : base(nameof(NuGetSuppressor), reportIds)
            {
            }
        }
 
        private sealed class VsixSuppressor : AbstractNugetOrVsixSuppressor
        {
            public VsixSuppressor(string[] reportIds)
                : base(nameof(VsixSuppressor), reportIds)
            {
            }
        }
 
        private abstract class AbstractNugetOrVsixSuppressor : DiagnosticSuppressor
        {
            private readonly Dictionary<string, SuppressionDescriptor> mapping = new Dictionary<string, SuppressionDescriptor>();
 
            protected AbstractNugetOrVsixSuppressor(string analyzerName, params string[] reportedIds)
                => SupportedSuppressions = CreateSupportedSuppressions(analyzerName, this.mapping, reportedIds);
 
            private static ImmutableArray<SuppressionDescriptor> CreateSupportedSuppressions(
                string analyzerName,
                Dictionary<string, SuppressionDescriptor> mapping,
                string[] reportedIds)
            {
                var builder = ArrayBuilder<SuppressionDescriptor>.GetInstance(reportedIds.Length);
                foreach (var id in reportedIds)
                {
                    var descriptor = new SuppressionDescriptor("SPR" + id, id, justification: analyzerName);
                    mapping.Add(descriptor.SuppressedDiagnosticId, descriptor);
                    builder.Add(descriptor);
                }
 
                return builder.ToImmutableAndFree();
            }
 
            public bool SuppressorInvoked { get; set; }
 
            public sealed override ImmutableArray<SuppressionDescriptor> SupportedSuppressions { get; }
 
            public override void ReportSuppressions(SuppressionAnalysisContext context)
            {
                SuppressorInvoked = true;
 
                foreach (var diagnostic in context.ReportedDiagnostics)
                {
                    if (this.mapping.TryGetValue(diagnostic.Id, out var descriptor))
                    {
                        context.ReportSuppression(
                            Microsoft.CodeAnalysis.Diagnostics.Suppression.Create(descriptor, diagnostic));
                    }
                }
            }
        }
    }
}
File: Diagnostics\DiagnosticAnalyzerDriver\DiagnosticAnalyzerDriverTests.cs	Web Access
Project: ..\..\..\src\EditorFeatures\CSharpTest\Microsoft.CodeAnalysis.CSharp.EditorFeatures.UnitTests.csproj (Microsoft.CodeAnalysis.CSharp.EditorFeatures.UnitTests)