code: async function _expectSuccessMessage(args, ...successMessages) {
    const { stdout, stderr } = await exec(getAntCommand(args));
    for (const successMessage of successMessages) {
      expect(stdout).toContain(successMessage);
    }
    expect(stderr).toEqual('');
  }
docs: Helper function to run the CLI command with args and check the expected CLI
  success message.
  @param {String} args The args to be sent to the CLI command.
  @param {String|Array<String>} successMessages The expected success messages.
  @async
  @private