Function runPromptWithAnswers

test/utils/test-utils.js:143–235

(cwd, args, answers = [], options = {})

 * @returns {Promise<{ stdout: string, stderr: string }>} result
 */
const runPromptWithAnswers = async (cwd, args, answers = [], options = {}) => {
  const execa = await import("execa");
  const proc = createProcess(execa, cwd, args, {
    ...options,
    // TODO remove me when node@18 will be removed from support
    cleanup: false,
  });

  proc.stdin.setDefaultEncoding("utf8");

  let currentAnswer = 0;
  let waitAnswer = true;

  const writeAnswer = (output) => {
    if (answers.length === 0) {
      proc.stdin.write(output);
      processKill(proc);

      return;
    }

    if (currentAnswer < answers.length) {
      const answer = answers[currentAnswer];

      proc.stdin.write(answer);
      waitAnswer = true;
      currentAnswer++;
    }
  };

  // Uncomment for debugging
  // proc.stderr.pipe(process.stdout);

  proc.stdout.pipe(
    new Writable({
      write(chunk, encoding, callback) {
        const output = chunk.toString("utf8");

        if (!output) {
          callback("No output");
          return;
        }

        const text = stripVTControlCharacters(output).trim();

        if (text.length <= 0) {
          callback();
          return;
        }

        if (waitAnswer && /\(.+\)$/m.test(text)) {
          waitAnswer = false;
          writeAnswer(output);
        }

        callback();
      },
    }),