838542 - Testing automatically generated xpidl event instance types using instanceof operator with B2G marionette throws exceptions

Status: RESOLVED WONTFIX

(Remote Protocol :: Marionette, defect)

Description

[Vicamo Yang [:vicamo][:vyang]]

See also bug 835148 and bug 813596.

Testing:

  (new ProgressEvent()) instanceof ProgressEvent.constructor

throws:

  invalid 'instanceof' operand ProgressEvent.constructor

Testing:

  (new ProgressEvent()) instanceof ProgressEvent

throws:

  'prototype' property of ProgressEvent is not an object

All these tests pass in web console of the desktop build.  Tests on other event types like Event, UIEvent, ProgressEvent, or non-event types like Audio fail with exactly the same exceptions. But XMLHttpRequest or non-autogened event types is ok.

Comment 1

[Jonathan Griffin (:jgriffin)]

Is this resolved by using instanceof window.wrappedJSObject.ProgressEvent.constructor?

Comment 2

[Vicamo Yang [:vicamo][:vyang]]

(In reply to Jonathan Griffin (:jgriffin) from comment #1)
> Is this resolved by using instanceof
> window.wrappedJSObject.ProgressEvent.constructor?

No.  I have:

> let event = new ProgressEvent("hello");
> ok(event instanceof window.wrappedJSObject.ProgressEvent.constructor,
> "ProgressEvent is instanceof " + event.constructor);

And got:

> MARIONETTE TEST RESULT:TEST-UNEXPECTED-FAIL | test_outgoing.js | ProgressEvent
> is instanceof [object XrayWrapper function ProgressEvent() {
>     [native code]
> }] - false was false, expected true

Comment 3

[Jonathan Griffin (:jgriffin)]

Do you have a test snippet I could play around with?

Comment 4

[Vicamo Yang [:vicamo][:vyang]]

(In reply to Jonathan Griffin (:jgriffin) from comment #3)
> Do you have a test snippet I could play around with?

This was first found in |dom/mobilemessage/tests/marionette/test_outgoing.js|[1].

[1]: https://mxr.mozilla.org/mozilla-central/source/dom/mobilemessage/tests/marionette/test_outgoing.js#109

Comment 5

[David Burns :automatedtester]

closing as b2g related