Free e-book: Testing for Continuous Delivery with Visual Studio 2012

Looking for a good book about testing with Visual Studio 2012?

Microsoft released the free Testing for Continuous Delivery with Visual Studio 2012 e-book.

“This book is aimed at test engineers, managers, developers, and folks interested in understanding the changing world of test. Over the last several years, software testing has changed a great deal. In the past, test plans were on paper, filed away and out of sight. Today they are—or can be with Visual Studio—living documents, as manual and automated tests are integrating into the test workflow supported by the test infrastructure.

Today you no longer have to set up physical boxes; instead you can set up and automate virtual environments composed of virtual machines to meet your testing environment needs. With Visual Studio and Team Foundation Server, the pain of dealing with a heterogeneous test infrastructure is reduced, the cost and effectiveness of testing a product is improved, and regression testing becomes cost effective instead of a nightmare.

Knowing how to test is important, but understanding how this new infrastructure is changing the business of testing and software delivery is critical. Today's businesses require nimble teams that can support continuous delivery and deal with updates and bugs in an agile fashion. It's what your customers have come to expect.
In this guide, we follow a team as they move from a conventional approach to testing towards one more suited to the needs of present-day development. We see how they address the costs and the pain of their old methods by adopting the testing infrastructure of Visual Studio 2012.”

Podman– Command execution failed with exit code 125

After updating WSL on one of the developer machines, Podman failed to work. When we took a look through Podman Desktop, we noticed that Podman had stopped running and returned the following error message: Error: Command execution failed with exit code 125 Here are the steps we tried to fix the issue: We started by running podman info to get some extra details on what could be wrong: >podman info OS: windows/amd64 provider: wsl version: 5.3.1 Cannot connect to Podman. Please verify your connection to the Linux system using `podman system connection list`, or try `podman machine init` and `podman machine start` to manage a new Linux VM Error: unable to connect to Podman socket: failed to connect: dial tcp 127.0.0.1:2655: connectex: No connection could be made because the target machine actively refused it. That makes sense as the podman VM was not running. Let’s check the VM: >podman machine list NAME ...

Cache stampede: when our cache turned against us

While investigating some performance issues, we ran into an ASP.NET Core API that cached a fairly expensive aggregation query for 60 seconds. Under normal load, that was fine: one request rebuilds the cache, everyone else reads from it. Under peak load, dozens of requests would arrive in that same expiry window, all see a cache miss, and all fire the same expensive query in parallel. The database didn't like that. That was the moment when our caching layer stopped helping and started hurting. A burst of requests comes in at the same time, all miss the cache, and all go hammer the database or the downstream API at once. That's a cache stampede . The cache was supposed to protect our backend, and for a few hundred milliseconds it did the opposite. Why this happens IMemoryCache.GetOrCreate (and its async sibling) looks like it protects you, but it doesn't add any locking on its own. Look at the naive version: public async Task<Report> GetReportAsync(string key) ...

VS Code Planning mode

After the introduction of Plan mode in Visual Studio , it now also found its way into VS Code. Planning mode, or as I like to call it 'Hannibal mode', extends GitHub Copilot's Agent Mode capabilities to handle larger, multi-step coding tasks with a structured approach. Instead of jumping straight into code generation, Planning mode creates a detailed execution plan. If you want more details, have a look at my previous post . Putting plan mode into action VS Code takes a different approach compared to Visual Studio when using plan mode. Instead of a configuration setting that you can activate but have limited control over, planning is available as a separate chat mode/agent: I like this approach better than how Visual Studio does it as you have explicit control when plan mode is activated. Instead of immediately diving into execution, the plan agent creates a plan and asks some follow up questions: You can further edit the plan by clicking on ‘Open in Editor’: ...

The art of simplicity

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