If you're looking to enhance your continues integration flow with awesome automatic integration tests, you should head over to the SDK section. The SDK section is all about writing test scripts that allow you to interact with your device and test different cases. Note that you can also run unit tests using any C/CPP unit testing platform (Unity UnitTest, CPPUTEST, etc.) on the Virtual Lab - just build your executables with the unit test embedded inside and run it (head over to Integrations for more details).
If you're looking to do some heavy debugging and your board has sensors and more components connected to an MCU (sensors anyone?), you'd want to visit the device configuration section. After going through that, head straight to the GDB section.