Function isMocking

src/test-utils.ts:32–48

* Check if the IntersectionObserver is currently being mocked. * @return boolean

()

 * @return boolean
 */
function isMocking() {
  const util = testLibraryUtil();
  if (util && typeof util.isMockFunction === "function") {
    return util.isMockFunction(window.IntersectionObserver);
  }

  // No global test utility found. Check if the IntersectionObserver was manually mocked.
  if (
    typeof window !== "undefined" &&
    window.IntersectionObserver &&
    "mockClear" in window.IntersectionObserver
  ) {
    return true;
  }

  return false;
}

/*
 ** If we are running in a valid testing environment, we can automate mocking the IntersectionObserver.