source: class CountEventsProjectionTest {
  
      @Test
      public void projectSingleQuestionQuiz() {
  
target:         final CountEventsProjection projection = new CountEventsProjection();
          final int nrOfPlayers = projection.project(EventStreamFactory.buildSingleQuestionEventSream());
          assertEquals(8, nrOfPlayers);
  
      }
  
  }