1 files changed, 73 insertions, 0 deletions
diff --git a/netwerk/test/unit/test_pac_reload_after_network_change.js b/netwerk/test/unit/test_pac_reload_after_network_change.js
new file mode 100644
index 0000000000..54fa5f3472
--- /dev/null
+++ b/netwerk/test/unit/test_pac_reload_after_network_change.js
@@ -0,0 +1,73 @@
+"use strict";
+
+const { HttpServer } = ChromeUtils.import("resource://testing-common/httpd.js");
+XPCOMUtils.defineLazyServiceGetter(
+  this,
+  "gProxyService",
+  "@mozilla.org/network/protocol-proxy-service;1",
+  "nsIProtocolProxyService"
+);
+var { setTimeout } = ChromeUtils.importESModule(
+  "resource://gre/modules/Timer.sys.mjs"
+);
+
+let pacServer;
+const proxyPort = 4433;
+
+add_setup(async function () {
+  pacServer = new HttpServer();
+  pacServer.registerPathHandler(
+    "/proxy.pac",
+    function handler(metadata, response) {
+      let content = `function FindProxyForURL(url, host) { return "HTTPS localhost:${proxyPort}"; }`;
+      response.setHeader("Content-Length", `${content.length}`);
+      response.bodyOutputStream.write(content, content.length);
+    }
+  );
+  pacServer.start(-1);
+});
+
+registerCleanupFunction(async () => {
+  Services.prefs.clearUserPref("network.proxy.type");
+  Services.prefs.clearUserPref("network.proxy.autoconfig_url");
+  Services.prefs.clearUserPref("network.proxy.reload_pac_delay");
+});
+
+async function getProxyInfo() {
+  return new Promise((resolve, reject) => {
+    let uri = Services.io.newURI("http://www.mozilla.org/");
+    gProxyService.asyncResolve(uri, 0, {
+      onProxyAvailable(_req, _uri, pi, _status) {
+        resolve(pi);
+      },
+    });
+  });
+}
+
+// Test if we can successfully get PAC when the PAC server is available.
+add_task(async function testPAC() {
+  // Configure PAC
+  Services.prefs.setIntPref("network.proxy.type", 2);
+  Services.prefs.setCharPref(
+    "network.proxy.autoconfig_url",
+    `http://localhost:${pacServer.identity.primaryPort}/proxy.pac`
+  );
+
+  let pi = await getProxyInfo();
+  Assert.equal(pi.port, proxyPort, "Expected proxy port to be the same");
+  Assert.equal(pi.type, "https", "Expected proxy type to be https");
+});
+
+// When PAC server is down, we should not use proxy at all.
+add_task(async function testWhenPACServerDown() {
+  Services.prefs.setIntPref("network.proxy.reload_pac_delay", 0);
+  await new Promise(resolve => pacServer.stop(resolve));
+
+  Services.obs.notifyObservers(null, "network:link-status-changed", "changed");
+
+  // eslint-disable-next-line mozilla/no-arbitrary-setTimeout
+  await new Promise(resolve => setTimeout(resolve, 3000));
+
+  let pi = await getProxyInfo();
+  Assert.equal(pi, null, "should have no proxy");
+});