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"use strict";
const PAGE = "http://example.com/browser/browser/base/content/test/general/page_style_sample.html";
/**
* Stylesheets are updated for a browser after the pageshow event.
* This helper function returns a Promise that waits for that pageshow
* event, and then resolves on the next tick to ensure that gPageStyleMenu
* has had a chance to update the stylesheets.
*
* @param browser
* The <xul:browser> to wait for.
* @return Promise
*/
function promiseStylesheetsUpdated(browser) {
return ContentTask.spawn(browser, { PAGE }, function*(args) {
return new Promise((resolve) => {
addEventListener("pageshow", function onPageShow(e) {
if (e.target.location == args.PAGE) {
removeEventListener("pageshow", onPageShow);
content.setTimeout(resolve, 0);
}
});
})
});
}
/**
* Tests that the Page Style menu shows the currently
* selected Page Style after a new one has been selected.
*/
add_task(function*() {
let tab = yield BrowserTestUtils.openNewForegroundTab(gBrowser, "about:blank", false);
let browser = tab.linkedBrowser;
yield BrowserTestUtils.loadURI(browser, PAGE);
yield promiseStylesheetsUpdated(browser);
let menupopup = document.getElementById("pageStyleMenu").menupopup;
gPageStyleMenu.fillPopup(menupopup);
// page_style_sample.html should default us to selecting the stylesheet
// with the title "6" first.
let selected = menupopup.querySelector("menuitem[checked='true']");
is(selected.getAttribute("label"), "6", "Should have '6' stylesheet selected by default");
// Now select stylesheet "1"
let target = menupopup.querySelector("menuitem[label='1']");
target.click();
// Now we need to wait for the content process to send its stylesheet
// update for the selected tab to the parent. Because messages are
// guaranteed to be sent in order, we'll make sure we do the check
// after the parent has been updated by yielding until the child
// has finished running a ContentTask for us.
yield ContentTask.spawn(browser, {}, function*() {
dump('\nJust wasting some time.\n');
});
gPageStyleMenu.fillPopup(menupopup);
// gPageStyleMenu empties out the menu between opens, so we need
// to get a new reference to the selected menuitem
selected = menupopup.querySelector("menuitem[checked='true']");
is(selected.getAttribute("label"), "1", "Should now have stylesheet 1 selected");
yield BrowserTestUtils.removeTab(tab);
});
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