const HTML_URL =
  "http://mochi.test:8888/browser/docshell/test/browser/file_bug1328501.html";
const FRAME_URL =
  "http://mochi.test:8888/browser/docshell/test/browser/file_bug1328501_frame.html";
const FRAME_SCRIPT_URL =
  "chrome://mochitests/content/browser/docshell/test/browser/file_bug1328501_framescript.js";
add_task(async function testMultiFrameRestore() {
  await SpecialPowers.pushPrefEnv({
    set: [
      ["browser.navigation.requireUserInteraction", false],
      // Disable bfcache so that dummy_page.html doesn't enter there.
      // The actual test page does already prevent bfcache and the test
      // is just for http-on-opening-request handling in the child process.
      ["browser.sessionhistory.max_total_viewers", 0],
    ],
  });
  await BrowserTestUtils.withNewTab({ gBrowser, url: HTML_URL }, async function(
    browser
  ) {
    // Navigate 2 subframes and load about:blank.
    let browserLoaded = BrowserTestUtils.browserLoaded(browser);
    await SpecialPowers.spawn(browser, [FRAME_URL], async function(FRAME_URL) {
      function frameLoaded(frame) {
        frame.contentWindow.location = FRAME_URL;
        return new Promise(r => (frame.onload = r));
      }
      let frame1 = content.document.querySelector("#testFrame1");
      let frame2 = content.document.querySelector("#testFrame2");
      ok(frame1, "check found testFrame1");
      ok(frame2, "check found testFrame2");
      await frameLoaded(frame1);
      await frameLoaded(frame2);
      content.location = "dummy_page.html";
    });
    await browserLoaded;

    // Load a frame script to query nsIDOMWindow on "http-on-opening-request",
    // which will force about:blank content viewers being created.
    browser.messageManager.loadFrameScript(FRAME_SCRIPT_URL, false);

    // The frame script also forwards frames-loaded.
    let framesLoaded = BrowserTestUtils.waitForMessage(
      browser.messageManager,
      "test:frames-loaded"
    );

    browser.goBack();
    await framesLoaded;
    // eslint-disable-next-line mozilla/no-arbitrary-setTimeout
    await new Promise(r => setTimeout(r, 1000));
    await SpecialPowers.spawn(browser, [FRAME_URL], FRAME_URL => {
      is(
        content.document.querySelector("#testFrame1").contentWindow.location
          .href,
        FRAME_URL
      );
      is(
        content.document.querySelector("#testFrame2").contentWindow.location
          .href,
        FRAME_URL
      );
    });
  });
});