Alexander Zeitler

Alexander Zeitler

Inspecting ASP.NET integration testing logs made easy with JetBrains Rider

Published on Wednesday, April 5, 2023

Photo by Nathan Bingle on Unsplash

Trying to spot something meaningful

The other day I was integration testing a Saga in the kliento code base. The tests failed and I wanted to skim through the logs to find something meaningful.

Scrolling through thousands of lines of log in a monochrome style is no fun... (to me this approach sometimes is easier than debugging anyway).

First things first: how do I get this output?

When spinning up my tests in Alba, I'm registering a XUnit sink for Serilog, so I get my logs redirected to the test output window in Rider:

public class When_recording_a_lead_inquiry_from_email : IAsyncLifetime
public When_recording_a_lead_inquiry_from_email(
ITestOutputHelper testOutputHelper
_testOutputHelper = testOutputHelper;

public async Task InitializeAsync()
var testServices = new TestServices();
var configuration = await testServices.GetTestConfigurationRoot();

var serilogLogger = Log.Logger = new LoggerConfiguration()

var dotnetILogger = new SerilogLoggerFactory(serilogLogger)

var builder = ConfigureHost.GetHostBuilder(
services =>

// arrange act assert...

My test output looks like this then:

The joy of black text on white background

While scrolling through the look I was thinking "would be nice if there would be some color coding for the log in Rider...".

And the next step was to spin up a search which eventually ended up on the landing page for "GrepConsole", a plugin for IntelliJ based IDEs like Rider which does exactly what I was looking for: colorize my test output logs.

After playing around with some settings, my logs now look like this:

much better, isn't it?

Much easier to spot exceptions, isn't it?

What's even better: you can add arbitrary expressions to filter and colorize fragments or lines.

So I set up a section for regular .NET log output colors and I added another one for Wolverine status messages. That way I can easily spot successful or failed messages.

That's my GrepConsole config so far:

GrepConsole settings

Right now, there's only one downside: I didn't find a way in Rider to export/import these settings although this seems to work in other JetBrains IDEs.


Looks like the settings get synced using repository sync 🎉️

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