This is a testharness.js-based test.
[FAIL] Registering a new script URL while an unregistered registration is in use
  assert_equals: before activated registration.installing expected null but got object "[object ServiceWorker]"
[FAIL] Registering a new script URL that fails to install does not resurrect unregistered registration
  assert_not_equals: New registration is different got disallowed value object "[object ServiceWorkerRegistration]"
Harness: the test ran to completion.