Troubleshoot test in vscode

Troubleshooting

Testing in Visual Studio Code is a streamlined process that can enhance your development workflow. However, sometimes tests may not appear as expected. If this occurs, restarting OmniSharp can often resolve the issue (F1 + Command "Restart Omnisharp
"). OmniSharp is an integral part of the C# extension for Visual Studio Code, providing a comprehensive development experience, including features such as intelligent code completion (IntelliSense), debugging, and more.

Restarting OmniSharp
If your tests are not showing up in Visual Studio Code, try restarting OmniSharp. Here's how:

1. Open the Command Palette with Ctrl+Shift+P.
2. Type OmniSharp: Restart OmniSharp.
3. Hit Enter, and wait for OmniSharp to reload.

Command Line

When specific tests need to be run, the command line can be a powerful ally. Utilizing the "dotnet test --filter" command allows for running selective tests that match a given expression. This is particularly useful in large projects where running every test is time-consuming.

Using Command Line Filters
To run a subset of tests, use the dotnet test --filter command. For instance, if you want to run tests that contain the word "Login":

dotnet test --filter "FullyQualifiedName~Login"

This command will run all tests with "Login" in their fully qualified name.

Debug test

For a deeper dive into test issues, setting the environment variable VSTEST_HOST_DEBUG=1 triggers a debug prompt before the test host starts, as detailed in the Visual Studio Test Platform documentation. This allows developers to attach a debugger to the test host process, providing insight into the test execution and facilitating a more thorough investigation of any underlying issues.

Debugging Test Platform Components
For debugging, set the VSTEST_HOST_DEBUG=1 environment variable. When you run your tests, a prompt will appear to attach a debugger. Here's how to set the variable in Windows:

1. Open Command Prompt as an administrator.
2. Type set VSTEST_HOST_DEBUG=1 and press Enter.
3. Run your tests in the same Command Prompt session.

Incorporating these practices into your testing routine can significantly improve efficiency and ensure a robust codebase. Remember, a well-tested application is a cornerstone of software reliability and user trust.