gecko-dev/netwerk/test/browser/browser_about_cache.js

"use strict";

/**
 * Open a dummy page, then open about:cache and verify the opened page shows up in the cache.
 */
add_task(async function() {
  await SpecialPowers.pushPrefEnv({
    set: [["privacy.partition.network_state", false]],
  });

  const kRoot = getRootDirectory(gTestPath).replace(
    "chrome://mochitests/content/",
    "https://example.com/"
  );
  const kTestPage = kRoot + "dummy.html";
  // Open the dummy page to get it cached.
  let tab = await BrowserTestUtils.openNewForegroundTab(
    gBrowser,
    kTestPage,
    true
  );
  BrowserTestUtils.removeTab(tab);

  tab = await BrowserTestUtils.openNewForegroundTab(
    gBrowser,
    "about:cache",
    true
  );
  let expectedPageCheck = function(uri) {
    info("Saw load for " + uri);
    // Can't easily use searchParms and new URL() because it's an about: URI...
    return uri.startsWith("about:cache?") && uri.includes("storage=disk");
  };
  let diskPageLoaded = BrowserTestUtils.browserLoaded(
    tab.linkedBrowser,
    false,
    expectedPageCheck
  );
  await SpecialPowers.spawn(tab.linkedBrowser, [], function() {
    ok(
      !content.document.nodePrincipal.isSystemPrincipal,
      "about:cache should not have system principal"
    );
    let principal = content.document.nodePrincipal;
    let channel = content.docShell.currentDocumentChannel;
    ok(!channel.loadInfo.loadingPrincipal, "Loading principal should be null.");
    is(
      principal.spec,
      content.document.location.href,
      "Principal matches location"
    );
    let links = [...content.document.querySelectorAll("a[href*=disk]")];
    is(links.length, 1, "Should have 1 link to the disk entries");
    links[0].click();
  });
  await diskPageLoaded;
  info("about:cache disk subpage loaded");

  expectedPageCheck = function(uri) {
    info("Saw load for " + uri);
    return uri.startsWith("about:cache-entry") && uri.includes("dummy.html");
  };
  let triggeringURISpec = tab.linkedBrowser.currentURI.spec;
  let entryLoaded = BrowserTestUtils.browserLoaded(
    tab.linkedBrowser,
    false,
    expectedPageCheck
  );
  await SpecialPowers.spawn(tab.linkedBrowser, [kTestPage], function(
    kTestPage
  ) {
    ok(
      !content.document.nodePrincipal.isSystemPrincipal,
      "about:cache with query params should still not have system principal"
    );
    let principal = content.document.nodePrincipal;
    is(
      principal.spec,
      content.document.location.href,
      "Principal matches location"
    );
    let channel = content.docShell.currentDocumentChannel;
    principal = channel.loadInfo.triggeringPrincipal;
    is(
      principal.spec,
      "about:cache",
      "Triggering principal matches previous location"
    );
    ok(!channel.loadInfo.loadingPrincipal, "Loading principal should be null.");
    let links = [
      ...content.document.querySelectorAll("a[href*='" + kTestPage + "']"),
    ];
    is(links.length, 1, "Should have 1 link to the entry for " + kTestPage);
    links[0].click();
  });
  await entryLoaded;
  info("about:cache entry loaded");

  await SpecialPowers.spawn(tab.linkedBrowser, [triggeringURISpec], function(
    triggeringURISpec
  ) {
    ok(
      !content.document.nodePrincipal.isSystemPrincipal,
      "about:cache-entry should also not have system principal"
    );
    let principal = content.document.nodePrincipal;
    is(
      principal.spec,
      content.document.location.href,
      "Principal matches location"
    );
    let channel = content.docShell.currentDocumentChannel;
    principal = channel.loadInfo.triggeringPrincipal;
    is(
      principal.spec,
      triggeringURISpec,
      "Triggering principal matches previous location"
    );
    ok(!channel.loadInfo.loadingPrincipal, "Loading principal should be null.");
    ok(
      content.document.querySelectorAll("th").length,
      "Should have several table headers with data."
    );
  });
  BrowserTestUtils.removeTab(tab);
});