This is a testharness.js-based test.
[FAIL] Test that calling setAppBadge in a cross-origin iframe throws a SecurityError
  promise_test: Unhandled rejection with value: object "TypeError: iframe.postMessage is not a function"
[FAIL] Test that calling clearAppBadge in a cross-origin iframe throws a SecurityError
  promise_test: Unhandled rejection with value: object "TypeError: iframe.postMessage is not a function"
[FAIL] Test that calling setAppBadge in a same-origin iframe succeeds
  promise_test: Unhandled rejection with value: object "TypeError: iframe.postMessage is not a function"
[FAIL] Test that calling clearAppBadge in a same-origin iframe succeeds
  promise_test: Unhandled rejection with value: object "TypeError: iframe.postMessage is not a function"
[FAIL] Test calling setAppBadge and clearAppBadge in a same-origin iframe after setting badge on the top level frame
  promise_test: Unhandled rejection with value: object "TypeError: iframe.postMessage is not a function"
[FAIL] Test badge behavior in multiple same-origin iframes
  promise_test: Unhandled rejection with value: object "TypeError: iframe.postMessage is not a function"
Harness: the test ran to completion.