This is a testharness.js-based test.
Found 8 FAIL, 0 TIMEOUT, 0 NOTRUN.
[FAIL] GamepadHapticActuator interface: operation playEffect(GamepadHapticEffectType, optional GamepadEffectParameters)
assert_equals: property has wrong .length expected 1 but got 2
[FAIL] GamepadEvent interface object length
assert_equals: wrong value for GamepadEvent.length expected 2 but got 1
[FAIL] HTMLBodyElement interface: attribute ongamepadconnected
assert_true: The prototype object must have a property "ongamepadconnected" expected true got false
[FAIL] HTMLBodyElement interface: attribute ongamepaddisconnected
assert_true: The prototype object must have a property "ongamepaddisconnected" expected true got false
[FAIL] Window interface: attribute ongamepadconnected
assert_own_property: The global object must have a property "ongamepadconnected" expected property "ongamepadconnected" missing
[FAIL] Window interface: attribute ongamepaddisconnected
assert_own_property: The global object must have a property "ongamepaddisconnected" expected property "ongamepaddisconnected" missing
[FAIL] HTMLFrameSetElement interface: attribute ongamepadconnected
assert_true: The prototype object must have a property "ongamepadconnected" expected true got false
[FAIL] HTMLFrameSetElement interface: attribute ongamepaddisconnected
assert_true: The prototype object must have a property "ongamepaddisconnected" expected true got false
Harness: the test ran to completion.