Running Visual Studio tests

More detailed/verbose build instructions are available at https://github.com/microsoft/ptvs/wiki/Build-Instructions-for-PTVS

• Install Visual Studio 2017 15.7 Preview 1 or later with the following workloads:
  • .NET Desktop development
  • Desktop Development with C++
  • Visual Studio extension development
• Clone https://github.com/microsoft/ptvs or your own fork
• Run PTVS\Python\Prerequisites\EnableSkipVerification.reg
• Run as Admin PTVS\Python\Prerequisites\deploy_test_targets.cmd
• Open PTVS\Python\PythonTools.sln
• Build solution
• F5 to launch Visual Studio experimental instance
• Check experimental debugger option in Tools/Options/Python/Experimental, close and relaunch VS
  • This is only needed for manual testing, the automated tests bypass the option
• Open Python Environments window
• Select the Python environment you want to run the tests under
• Click on Make this the default environment for new projects
• Install/update ptvsd in that environment
• Close Visual Studio experimental instance
• Open Test Explorer, select Group by Class from the toolbar
• Right-click on DebugProjectUITestsExperimental and Run Tests
• This will launch the Visual Studio experimental instance and run the tests
• Wait for test run to complete

Note: We're waiting for a fix from the adapter host team. Right now, all tests are failing.