Function assertIsPromise

test/parallel/test-primordials-promise.js:128–133

(promise)

}

function assertIsPromise(promise) {
  // Make sure the returned promise is a genuine %Promise% object and not a
  // subclass instance.
  assert.strictEqual(Object.getPrototypeOf(promise), Promise.prototype);
  PromisePrototypeThen(promise, common.mustCall());
}