This is a testharness.js-based test.
[FAIL] InputDeviceCapabilities interface: attribute pointerMovementScrolls
  assert_true: The prototype object must have a property "pointerMovementScrolls" expected true got false
[FAIL] InputDeviceCapabilities interface: new InputDeviceCapabilities must inherit property "pointerMovementScrolls" with the proper type
  assert_inherits: property "pointerMovementScrolls" not found in prototype chain
Harness: the test ran to completion.