475088 - Can't copy to the native clipboard in xpcshell based tests

Status: NEW

(Core :: Widget, defect)

Description

[(no longer active)]

The following code, if run inside an xpcshell based test, would run without any exceptions, but will not copy anything to the native clipboard:

function copy(str) {
  Cc["@mozilla.org/widget/clipboardhelper;1"].
  getService(Ci.nsIClipboardHelper).
  copyString(str);
}

Neither does this code:

function copy(str_to_copy) {
  let str = Cc["@mozilla.org/supports-string;1"].
            createInstance(Ci.nsISupportsString);
  str.data = str_to_copy;
  let trans = Cc["@mozilla.org/widget/transferable;1"].
              createInstance(Ci.nsITransferable);
  trans.addDataFlavor("text/unicode");
  trans.setTransferData("text/unicode", str, str_to_copy.length * 2);
  let clip = Cc["@mozilla.org/widget/clipboard;1"].
             getService(Ci.nsIClipboard);
  clip.setData(trans, null, Ci.nsIClipboard.kGlobalClipboard);
}

I faced this when I was trying to write the test for bug 462106 as an xpcshell test.  Eventually I gave up.

I tried debugging the clipboard implementation while running these two pieces of code, and I went on to make sure that OleSetClipboard is being called in both cases without error.  I'm not sure what's going wrong here at all.

Comment 1

[:Gavin Sharp [email: [e-mail]]]

Probably unlikely, but I don't suppose you're relying on our APIs to detect whether it was copied? Marco's discovered some issues with that in bug 474081.

Comment 2

[(no longer active)]

(In reply to comment #1)
> Probably unlikely, but I don't suppose you're relying on our APIs to detect
> whether it was copied? Marco's discovered some issues with that in bug 474081.

Nope, I see this problem with good ol' Ctrl+V.  :-)  The contents of the clipboard do not change.