devtools/client/netmonitor/test/browser_net_offline_mode.js

   1 /* Any copyright is dedicated to the Public Domain.
   2    http://creativecommons.org/publicdomain/zero/1.0/ */
   3
   4 // Test network throttling `offline` mode
   5
   6 "use strict";
   7
   8 requestLongerTimeout(2);
   9
  10 const {
  11   PROFILE_CONSTANTS,
  12 } = require("resource://devtools/client/shared/components/throttling/profiles.js");
  13
  14 add_task(async function () {
  15   await pushPref("devtools.cache.disabled", true);
  16
  17   const { tab, monitor, toolbox } = await initNetMonitor(HTTPS_CUSTOM_GET_URL, {
  18     requestCount: 1,
  19   });
  20   await selectThrottle(monitor, PROFILE_CONSTANTS.OFFLINE);
  21   assertCurrentThrottleSelected(monitor, PROFILE_CONSTANTS.OFFLINE);
  22
  23   const offlineEventFired = SpecialPowers.spawn(
  24     tab.linkedBrowser,
  25     [],
  26     async function () {
  27       return content.wrappedJSObject.hasOfflineEventFired();
  28     }
  29   );
  30
  31   ok(offlineEventFired, "The offline event on the page fired");
  32
  33   // As the browser is offline, load event won't fire
  34   await reloadBrowser({ waitForLoad: false });
  35
  36   await assertNavigatorOnlineInConsole(toolbox, "false");
  37   await assertPageIsOffline();
  38
  39   await selectThrottle(monitor, PROFILE_CONSTANTS.REGULAR_4G_LTE);
  40   assertCurrentThrottleSelected(monitor, PROFILE_CONSTANTS.REGULAR_4G_LTE);
  41
  42   await reloadBrowser();
  43
  44   await assertNavigatorOnlineInConsole(toolbox, "true");
  45   await assertPageIsOnline();
  46
  47   await teardown(monitor);
  48 });
  49
  50 function assertCurrentThrottleSelected(monitor, expectedProfile) {
  51   const doc = monitor.panelWin.document;
  52   is(
  53     doc.querySelector("#network-throttling").innerText,
  54     expectedProfile,
  55     `The '${expectedProfile}' throttle profile is correctly selected`
  56   );
  57 }
  58
  59 function assertPageIsOffline() {
  60   // This is an error page.
  61   return SpecialPowers.spawn(
  62     gBrowser.selectedTab.linkedBrowser,
  63     [HTTPS_CUSTOM_GET_URL],
  64     function (uri) {
  65       is(
  66         content.document.documentURI.substring(0, 27),
  67         "about:neterror?e=netOffline",
  68         "Document URI is the error page."
  69       );
  70
  71       // But location bar should show the original request.
  72       is(content.location.href, uri, "Docshell URI is the original URI.");
  73     }
  74   );
  75 }
  76
  77 function assertPageIsOnline() {
  78   // This is an error page.
  79   return SpecialPowers.spawn(
  80     gBrowser.selectedTab.linkedBrowser,
  81     [HTTPS_CUSTOM_GET_URL],
  82     function (uri) {
  83       is(content.document.documentURI, uri, "Document URI is the original URI");
  84
  85       // But location bar should show the original request.
  86       is(content.location.href, uri, "Docshell URI is the original URI.");
  87     }
  88   );
  89 }
  90
  91 async function assertNavigatorOnlineInConsole(toolbox, expectedResultValue) {
  92   const input = "navigator.onLine";
  93   info(`Assert the value of '${input}' in the console`);
  94   await toolbox.openSplitConsole();
  95   const { hud } = await toolbox.getPanel("webconsole");
  96   hud.setInputValue(input);
  97   return waitForEagerEvaluationResult(hud, expectedResultValue);
  98 }