message: construction_worker: experimenting with configurations
diff: version: '{build}'
  +
  +configuration:
  + - Debug
  + - Release
  +
  os:
  - Visual Studio 2015
  - Visual Studio 2017
  +
  init: []
  +
  install: []
  +
  build_script:
  - IF "%APPVEYOR_BUILD_WORKER_IMAGE%" == "Visual Studio 2015" ( SET GEN="Visual Studio 14 2015") ELSE (SET GEN="Visual Studio 15 2017")
  - cmake . -G%GEN%
  - cmake --build . --config Release
  +
  test_script:
  - ctest -C Release -V
  