OpenTelemetry

This feature requires the Microsoft.Testing.Extensions.OpenTelemetry NuGet package.

This extension integrates OpenTelemetry with Microsoft.Testing.Platform, allowing test runs to emit traces and metrics through the standard OpenTelemetry SDK.

Important

This extension is currently experimental. All public APIs are gated behind the TPEXP diagnostic ID.

Registration

Note

This extension doesn't support auto-registration. You must register it manually by disabling the auto-generated entry point (<GenerateTestingPlatformEntryPoint>false</GenerateTestingPlatformEntryPoint>) and calling AddOpenTelemetryProvider in your Main method.

var builder = await TestApplication.CreateBuilderAsync(args);

builder.AddOpenTelemetryProvider(
    withTracing: tracing => tracing
        .AddTestingPlatformInstrumentation()
        .AddConsoleExporter(),
    withMetrics: metrics => metrics
        .AddTestingPlatformInstrumentation()
        .AddConsoleExporter()
);

using var app = await builder.BuildAsync();
return await app.RunAsync();

API

AddOpenTelemetryProvider

Registers the OpenTelemetry provider on ITestApplicationBuilder. Accepts two optional callbacks:

• withTracing: configures the TracerProviderBuilder for distributed tracing.
• withMetrics: configures the MeterProviderBuilder for metrics collection.

AddTestingPlatformInstrumentation

Call on TracerProviderBuilder or MeterProviderBuilder to subscribe to the built-in Microsoft.Testing.Platform activity source and meter.

Activity source and meter

The extension emits telemetry under:

• Activity source: Microsoft.Testing.Platform
• Meter: Microsoft.Testing.Platform