This is a testharness.js-based test.
[FAIL] Accessing child browsing contexts 1
  assert_equals: The top browsing context should have 3 child browsing contexts. expected 3 but got 1
[FAIL] Accessing child browsing contexts 3
  assert_equals: The top browsing context should have 3 child browsing contexts. expected 3 but got 1
Harness: the test ran to completion.