public async Task <IImmutableSet <string> > DetectFeaturesAsync(string projectFullPath, CancellationToken cancellationToken = default)
{
if (projectFullPath == null)
{
throw new ArgumentNullException(nameof(projectFullPath));
}
// If the workspace is uninitialized, we need to do the first access on the UI thread.
//
// This is very unlikely to occur, but doing it here for completeness.
if (!_workspace.IsValueCreated)
{
await ThreadHelper.JoinableTaskFactory.SwitchToMainThreadAsync(cancellationToken);
GC.KeepAlive(_workspace.Value);
await TaskScheduler.Default;
}
var workspace = _workspace.Value;
var solution = workspace.CurrentSolution;
var project = GetProject(solution, projectFullPath);
if (project == null)
{
// Cannot find matching project.
return(ImmutableHashSet <string> .Empty);
}
var compilation = await project.GetCompilationAsync(cancellationToken).ConfigureAwait(false);
return(await CompilationFeatureDetector.DetectFeaturesAsync(compilation, cancellationToken));
}
public async Task DetectFeaturesAsync_FindsNoFeatures()
{
// Arrange
var source = @"
using Microsoft.AspNetCore.Builder;
namespace Microsoft.AspNetCore.Analyzers.TestFiles.CompilationFeatureDetectorTest
{
public class StartupWithNoFeatures
{
public void Configure(IApplicationBuilder app)
{
app.UseRouting();
app.UseEndpoints(endpoints =>
{
endpoints.MapFallbackToFile(""index.html"");
});
}
}
}";
var compilation = TestCompilation.Create(source);
var symbols = new StartupSymbols(compilation);
var type = (INamedTypeSymbol)compilation.GetSymbolsWithName("StartupWithNoFeatures").Single();
Assert.True(StartupFacts.IsStartupClass(symbols, type));
// Act
var features = await CompilationFeatureDetector.DetectFeaturesAsync(compilation);
// Assert
Assert.Empty(features);
}
public async Task DetectFeatureAsync_StartupWithMapHub_FindsSignalR()
{
var source = @"
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.SignalR;
namespace Microsoft.AspNetCore.Analyzers.TestFiles.CompilationFeatureDetectorTest
{
public class StartupWithMapHub
{
public void Configure(IApplicationBuilder app)
{
app.UseRouting();
app.UseEndpoints(endpoints =>
{
endpoints.MapHub<MyHub>("" / test"");
});
}
}
public class MyHub : Hub
{
}
}
";
var compilation = TestCompilation.Create(source);
var symbols = new StartupSymbols(compilation);
var type = (INamedTypeSymbol)compilation.GetSymbolsWithName("StartupWithMapHub").Single();
Assert.True(StartupFacts.IsStartupClass(symbols, type));
// Act
var features = await CompilationFeatureDetector.DetectFeaturesAsync(compilation);
// Assert
Assert.Collection(features, f => Assert.Equal(WellKnownFeatures.SignalR, f));
}