Running your testcases concurrently

System- and integration tests can take a lot of time to complete. If you want to speed this up then you can choose to run multiple test cases at the same time in parallel.

Unit Testcases in Visual Studio

You can configure Visual Studio to run unit concurrent testcases on your local machine using the following procedure:

  1. Ensure your project is using a .testsettings file
  2. Open it in an XML editor (Notepad++ or visual Studio’s “Open With” command)
  3. Set the parallelTestCount attribute on the Execution entity some some integer value

This will only work for situations where all the following is true:

  • The testcases and related frameworks are thread-safe
  • The testcases are of type unit testcase. It really won’t work for coded-ui tests
  • Its NOT a Data-Driven Unit Test
  • There are 0 diagnostic adapters included in the .testsettings file
  • Your machine has multiple cores

Controller and Agents with Visual Studio

If you have enough Physical or Virtual Machines available, then its always possible to configure a Controller and multiple agents. That will allow you to distribute your testcases over the machines. There’s no limitation on the type of testcases here. The only thing to take into account that running testcases that interact with a User Interface will require specific configuration on part of the agent machines. I use this setup mainly for running a lot of performance-tests against my client’s SharePoint farm.

See Configuring Test Controllers and Test Agents for Load Testing for details.

SpecFlow / SpecRun

SpecRun is a test-runner from the makers of SpecFlow that will allow you to run many concurrent SpecFlow scenarios. Its easy to setup and doesn’t really have any significant limitations. I use a combination of SpecFlow, SpecRun and an on-premise Selenium Grid to run my 250+ automated regression tests.