Function gcUntil

test/common/gc.js:52–65

* Repeatedly triggers garbage collection until a specified condition is met or a maximum number of attempts is reached. * This utillity must be run in a Node.js instance that enables --expose-gc. * @param {string|Function} [name] - Optional name, used in the rejection message if the condition is n

(name, condition, maxCount = 10, gcOptions)

 * @returns {Promise} A promise that resolves when the condition is met, or rejects after 10 failed attempts.
 */
async function gcUntil(name, condition, maxCount = 10, gcOptions) {
  for (let count = 0; count < maxCount; ++count) {
    await setImmediatePromisified();
    if (gcOptions) {
      await global.gc(gcOptions);
    } else {
      await global.gc();  // Passing in undefined is not the same as empty.
    }
    if (condition()) {
      return;
    }
  }
  throw new Error(`Test ${name} failed`);
}

// This function can be used to check if an object factor leaks or not,
// but it needs to be used with care: