private static async Task<DiagnosticAnalysisResult> AnalyzeAsync(TestWorkspace workspace, ProjectId projectId, Type analyzerType, CancellationToken cancellationToken = default(CancellationToken))
{
var diagnosticService = workspace.ExportProvider.GetExportedValue<IDiagnosticAnalyzerService>();
var executor = new VisualStudioDiagnosticAnalyzerExecutor(diagnosticService, new MyUpdateSource(workspace));
var analyzerReference = new AnalyzerFileReference(analyzerType.Assembly.Location, new TestAnalyzerAssemblyLoader());
var project = workspace.CurrentSolution.GetProject(projectId).AddAnalyzerReference(analyzerReference);
var analyzerDriver = (await project.GetCompilationAsync()).WithAnalyzers(analyzerReference.GetAnalyzers(project.Language).Where(a => a.GetType() == analyzerType).ToImmutableArray());
var result = await executor.AnalyzeAsync(analyzerDriver, project, cancellationToken);
return result.AnalysisResult[analyzerDriver.Analyzers[0]];
}
public async Task TestHostAnalyzers()
{
var code = @"class Test
{
void Method()
{
var t = new Test();
}
}";
using (var workspace = await CreateWorkspaceAsync(LanguageNames.CSharp, code))
{
var analyzerType = typeof(CSharpUseExplicitTypeDiagnosticAnalyzer);
var analyzerReference = new AnalyzerFileReference(analyzerType.Assembly.Location, new TestAnalyzerAssemblyLoader());
var mockAnalyzerService = CreateMockDiagnosticAnalyzerService(new[] { analyzerReference });
// add host analyzer as global assets
var snapshotService = workspace.Services.GetService<ISolutionSynchronizationService>();
var assetBuilder = new CustomAssetBuilder(workspace);
foreach (var reference in mockAnalyzerService.GetHostAnalyzerReferences())
{
var asset = assetBuilder.Build(reference, CancellationToken.None);
snapshotService.AddGlobalAsset(reference, asset, CancellationToken.None);
}
// set option
workspace.Options = workspace.Options.WithChangedOption(CSharpCodeStyleOptions.UseImplicitTypeWhereApparent, new CodeStyleOption<bool>(false, NotificationOption.Suggestion));
// run analysis
var project = workspace.CurrentSolution.Projects.First();
var executor = new VisualStudioDiagnosticAnalyzerExecutor(mockAnalyzerService, new MyUpdateSource(workspace));
var analyzerDriver = (await project.GetCompilationAsync()).WithAnalyzers(analyzerReference.GetAnalyzers(project.Language).Where(a => a.GetType() == analyzerType).ToImmutableArray());
var result = await executor.AnalyzeAsync(analyzerDriver, project, CancellationToken.None);
var analyzerResult = result.AnalysisResult[analyzerDriver.Analyzers[0]];
// check result
var diagnostics = analyzerResult.SemanticLocals[analyzerResult.DocumentIds.First()];
Assert.Equal(IDEDiagnosticIds.UseExplicitTypeDiagnosticId, diagnostics[0].Id);
}
}