Verify to work - unit tests

Figure out a verification method. Either manual or automated.

• Qt Gradle Plugin tests:
  • Plugin is applied
  • Extension is registered
  • Build task is found
  • Extension properties go to the task

• Qt Build Task tests:
  • commands 
    • configCommand
    • buildCommand
    • These are better to be tested some other way. Reason: Uses variables configured during runtime, that would need to be configured in the test. aka: long test.
  • Helper functions
    • Others
      • build directory is appended with "qt_generated/'projectName'" 
      • empty settings.gradle gets created
      • QtBuildTask dependency gest added
    • Exec 
      • produces success with valid input
      • produces error with failing input 
    • JSON
      • read json file
      • extract value from json
    • CMake & Ninja
      • qt-cmake returns correct path
      • ninja returns correct path
    • SDK & NDK
      • works with valid sdk
      • produces error with invalid sdk
      • ndk gets found