/* Any copyright is dedicated to the Public Domain.
   http://creativecommons.org/publicdomain/zero/1.0/ */

/* Ensure that clicking the button in the Offline mode neterror page makes the browser go online. See bug 435325. */

add_task(async function checkSwitchPageToOnlineMode() {
  // Go offline and disable the proxy and cache, then try to load the test URL.
  Services.io.offline = true;

  // Tests always connect to localhost, and per bug 87717, localhost is now
  // reachable in offline mode.  To avoid this, disable any proxy.
  let proxyPrefValue = SpecialPowers.getIntPref("network.proxy.type");
  await SpecialPowers.pushPrefEnv({
    set: [
      ["network.proxy.type", 0],
      ["browser.cache.disk.enable", false],
      ["browser.cache.memory.enable", false],
    ],
  });

  await BrowserTestUtils.withNewTab("about:blank", async function (browser) {
    let netErrorLoaded = BrowserTestUtils.waitForErrorPage(browser);

    // eslint-disable-next-line @microsoft/sdl/no-insecure-url
    BrowserTestUtils.loadURIString(browser, "http://example.com/");
    await netErrorLoaded;

    // Re-enable the proxy so example.com is resolved to localhost, rather than
    // the actual example.com.
    await SpecialPowers.pushPrefEnv({
      set: [["network.proxy.type", proxyPrefValue]],
    });
    let changeObserved = TestUtils.topicObserved(
      "network:offline-status-changed"
    );

    // Click on the 'Try again' button.
    await SpecialPowers.spawn(browser, [], async function () {
      ok(
        content.document.documentURI.startsWith("about:neterror?e=netOffline"),
        "Should be showing error page"
      );
      content.document
        .querySelector("#netErrorButtonContainer > .try-again")
        .click();
    });

    await changeObserved;
    ok(
      !Services.io.offline,
      "After clicking the 'Try Again' button, we're back online."
    );
  });
});

registerCleanupFunction(function () {
  Services.io.offline = false;
});