Function flushTicks

src/testing/platform/testing-task-queue.ts:42–69

()

 * next tick.
 */
export function flushTicks(): Promise<void> {
  return new Promise<void>((resolve, reject) => {
    function drain() {
      try {
        if (queuedTicks.length > 0) {
          const writeTasks = queuedTicks.slice();

          queuedTicks.length = 0;

          let cb: Function;
          while ((cb = writeTasks.shift())) {
            cb(Date.now());
          }
        }

        if (queuedTicks.length > 0) {
          process.nextTick(drain);
        } else {
          resolve();
        }
      } catch (e) {
        reject(`flushTicks: ${e}`);
      }
    }

    process.nextTick(drain);
  });
}

/**
 * Push a RequestAnimationFrame callback onto the {@link queuedWriteTasks} data structure