This is a testharness.js-based test.
Found 2 FAIL, 0 TIMEOUT, 0 NOTRUN.
[FAIL] onbeforematch: the content attribute must be compiled into a function as the corresponding property
  assert_equals: The onbeforematch property must be a function expected "function" but got "object"
[FAIL] onbeforematch: dynamic changes on the attribute
  assert_equals: The onbeforematch property must be a function (set attribute) expected "function" but got "object"
Harness: the test ran to completion.