private void When_passing_a_real_command()
 {
     _runner = new Runner(new[] { "create-app", "--help" }, new StringWriter(), _generators);
 }
 private void When_passing_a_non_existent_command()
 {
     _writer =  new StringBuilder();
     _runner = new Runner(new[] { "fake" }, new StringWriter(_writer), _generators);
 }