browser_dragimage.js

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const TEST_URI = "dragimage.html";

// This test checks that dragging an image onto the same document

// does not drop it, even when the page cancels the dragover event.

add_task(async function dragimage_remote_tab() {

  var tab = await BrowserTestUtils.openNewForegroundTab(

    gBrowser,

    "http://www.example.com/browser/dom/events/test/" + TEST_URI

);

  let dropHappened = false;

  let oldHandler = tab.linkedBrowser.droppedLinkHandler;

  tab.linkedBrowser.droppedLinkHandler = () => {

    dropHappened = true;

};

  await SpecialPowers.spawn(tab.linkedBrowser, [], async () => {

    let image = content.document.body.firstElementChild;

    let target = content.document.body.lastElementChild;

    await EventUtils.synthesizePlainDragAndDrop({

      srcElement: image,

      destElement: target,

      srcWindow: content,

      destWindow: content,

      id: content.windowUtils.DEFAULT_MOUSE_POINTER_ID,

});

});

  tab.linkedBrowser.droppedLinkHandler = oldHandler;

  ok(!dropHappened, "drop did not occur");

  BrowserTestUtils.removeTab(tab);

});

// This test checks the same but with an in-process page.

add_task(async function dragimage_local_tab() {

  var tab = await BrowserTestUtils.openNewForegroundTab(

    gBrowser,

    getRootDirectory(gTestPath) + TEST_URI

);

  let dropHappened = false;

  let oldHandler = tab.linkedBrowser.droppedLinkHandler;

  tab.linkedBrowser.droppedLinkHandler = () => {

    dropHappened = true;

};

  let image = tab.linkedBrowser.contentDocument.body.firstElementChild;

  let target = tab.linkedBrowser.contentDocument.body.lastElementChild;

  await EventUtils.synthesizePlainDragAndDrop({

    srcElement: image,

    destElement: target,

    srcWindow: tab.linkedBrowser.contentWindow,

    destWindow: tab.linkedBrowser.contentWindow,

});

  tab.linkedBrowser.droppedLinkHandler = oldHandler;

  ok(!dropHappened, "drop did not occur");

  BrowserTestUtils.removeTab(tab);

});