This is a testharness.js-based test.
[FAIL] Should be known: '(navigation-controls)'
  assert_true: expected true got false
[FAIL] Should be known: '(navigation-controls: none)'
  assert_true: expected true got false
[FAIL] Should be known: '(navigation-controls: back-button)'
  assert_true: expected true got false
[FAIL] Check that none evaluates to false in the boolean context
  assert_equals: expected true but got false
Harness: the test ran to completion.