This is a testharness.js-based test.
[FAIL] Keyboard interface: existence and properties of interface object
assert_equals: prototype of Keyboard is not EventTarget expected function "function EventTarget() { [native code] }" but got function "function () { [native code] }"
[FAIL] Keyboard interface: existence and properties of interface prototype object
assert_equals: prototype of Keyboard.prototype is not EventTarget.prototype expected object "[object EventTarget]" but got object "[object Object]"
Harness: the test ran to completion.