async-test-util/dist/es/run-forever.js

Util-functions that are be useful in async tests

import wait from './wait';
import promisify from './promisify';
export default function runForever(predicate) {
  var interval = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 100;
  var t = 1; // trick optimizers
  return new Promise(function () {
    var runLoop = function runLoop() {
      t++;
      var val = promisify(predicate());
      val.then(function () {
        return wait(interval);
      }).then(function () {
        return runLoop();
      });
    };
    runLoop(t);
  });
}