bug 1503393 - adjust tests for localhost proxying r=mayhemer

Fix test_proxy-failover_canceled and browser_firstPartyIsolation

browser/components/originattributes/test/browser/browser_firstPartyIsolation.js

@@ -287,6 +287,11 @@ add_task(async function ip_address_test() {
   const ipAddr = "127.0.0.1";
   const ipHost = `http://${ipAddr}/browser/browser/components/originattributes/test/browser/`;
 
+  Services.prefs.setCharPref("network.proxy.no_proxies_on", "");
+  registerCleanupFunction(function() {
+    Services.prefs.clearUserPref("network.proxy.no_proxies_on");
+  });
+
   let tab = BrowserTestUtils.addTab(gBrowser, ipHost + "test_firstParty.html");
   await BrowserTestUtils.browserLoaded(tab.linkedBrowser, true);
 

netwerk/test/unit/test_proxy-failover_canceled.js

@@ -39,7 +39,8 @@ function run_test()
   var prefserv = Cc["@mozilla.org/preferences-service;1"].
                  getService(Ci.nsIPrefService);
   var prefs = prefserv.getBranch("network.proxy.");
-  prefs.setIntPref("type", 2);
+    prefs.setIntPref("type", 2);
+    prefs.setCharPref("no_proxies_on", "nothing");
   prefs.setCharPref("autoconfig_url", "data:text/plain," +
     "function FindProxyForURL(url, host) {return 'PROXY a_non_existent_domain_x7x6c572v:80; PROXY localhost:" +
     httpServer.identity.primaryPort + "';}"