This is a testharness.js-based test.
[FAIL] TextDetector interface: operation availability(TextDetectorOptions)
  assert_own_property: interface object missing static operation expected property "availability" missing
[FAIL] TextDetector interface: operation create(optional TextDetectorCreateOptions)
  assert_own_property: interface object missing static operation expected property "create" missing
[FAIL] TextDetector interface: calling availability(TextDetectorOptions) on new TextDetector() with too few arguments must throw TypeError
  assert_own_property: interface object must have static operation as own property expected property "availability" missing
[FAIL] TextDetector interface: calling create(optional TextDetectorCreateOptions) on new TextDetector() with too few arguments must throw TypeError
  assert_own_property: interface object must have static operation as own property expected property "create" missing
Harness: the test ran to completion.