public ProcessCommands createAfterClean(int processNumber) {
    return createForProcess(processNumber, true);
  }
@Test
  public void getProcessCommands_fails_if_processNumber_is_less_than_0() throws Exception {
    try (AllProcessesCommands commands = new AllProcessesCommands(temp.newFolder())) {
      int processNumber = -2;

      assertThatThrownBy(() -> commands.createAfterClean(processNumber))
        .isInstanceOf(IllegalArgumentException.class)
        .hasMessage("Process number " + processNumber + " is not valid");
    }
  }