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

"use strict";

// The test loads an initial page and then another page which does enough
// fragment navigations so that when going back to the initial page and then
// forward to the last page, the initial page is evicted from the bfcache.
add_task(async function testBFCacheEviction() {
  // Make an unrealistic large timeout.
  await SpecialPowers.pushPrefEnv({
    set: [["browser.sessionhistory.contentViewerTimeout", 86400]],
  });

  const uri = "data:text/html,initial page";
  const uri2 =
    getRootDirectory(gTestPath).replace(
      "chrome://mochitests/content",
      "https://example.com"
    ) + "dummy_page.html";

  await BrowserTestUtils.withNewTab({ gBrowser, url: uri }, async function(
    browser
  ) {
    BrowserTestUtils.loadURI(browser, uri2);
    await BrowserTestUtils.browserLoaded(browser);

    let awaitPageShow = BrowserTestUtils.waitForContentEvent(
      browser,
      "pageshow"
    );
    await SpecialPowers.spawn(browser, [], async function() {
      content.location.hash = "1";
      content.location.hash = "2";
      content.location.hash = "3";
      content.history.go(-4);
    });

    await awaitPageShow;

    let awaitPageShow2 = BrowserTestUtils.waitForContentEvent(
      browser,
      "pageshow"
    );
    await SpecialPowers.spawn(browser, [], async function() {
      content.history.go(4);
    });
    await awaitPageShow2;
    ok(true, "Didn't time out.");
  });
});