/**
 * TestCase for bug 1406253
 * <https://bugzilla.mozilla.org/show_bug.cgi?id=1406253>
 *
 * Load firebird.png, redirect it to doggy.png, and verify the filename is
 * doggy.png in file picker dialog.
 */

let {WebRequest} = Cu.import("resource://gre/modules/WebRequest.jsm", {});
let MockFilePicker = SpecialPowers.MockFilePicker;
MockFilePicker.init(window);
add_task(async function() {
  const URL_FIREBIRD = "http://mochi.test:8888/browser/toolkit/content/tests/browser/firebird.png";
  const URL_DOGGY = "http://mochi.test:8888/browser/toolkit/content/tests/browser/doggy.png";
  function redirect(requestDetails) {
    info("Redirecting: " + requestDetails.url);
    return {
      redirectUrl: URL_DOGGY
    };
  }
  WebRequest.onBeforeRequest.addListener(redirect,
    {urls: new MatchPatternSet(["http://*/*firebird.png"])},
    ["blocking"]
  );

  await BrowserTestUtils.withNewTab(URL_FIREBIRD,
  async function(browser) {

    // Click image to show context menu.
    let popupShownPromise = BrowserTestUtils.waitForEvent(document, "popupshown");
    await BrowserTestUtils.synthesizeMouseAtCenter("img",
                                                    { type: "contextmenu", button: 2 },
                                                    browser);
    await popupShownPromise;

    // Prepare mock file picker.
    let showFilePickerPromise = new Promise(resolve => {
      MockFilePicker.showCallback = fp => resolve(fp.defaultString);
    });
    registerCleanupFunction(function() {
      MockFilePicker.cleanup();
    });

    // Select "Save Image As" option from context menu
    var saveImageAsCommand = document.getElementById("context-saveimage");
    saveImageAsCommand.doCommand();

    let filename = await showFilePickerPromise;
    is(filename, "doggy.png", "Verify image filename.");

    // Close context menu.
    let contextMenu = document.getElementById("contentAreaContextMenu");
    let popupHiddenPromise = BrowserTestUtils.waitForEvent(contextMenu, "popuphidden");
    contextMenu.hidePopup();
    await popupHiddenPromise;
  });

  WebRequest.onBeforeRequest.removeListener(redirect);
});
