1 files changed, 75 insertions, 0 deletions
diff --git a/netwerk/test/unit/test_localhost_offline.js b/netwerk/test/unit/test_localhost_offline.js
new file mode 100644
index 0000000000..de0ff6df4e
--- /dev/null
+++ b/netwerk/test/unit/test_localhost_offline.js
@@ -0,0 +1,75 @@
+"use strict";
+
+const { HttpServer } = ChromeUtils.import("resource://testing-common/httpd.js");
+var httpServer = null;
+const body = "Hello";
+
+function makeChan(url) {
+  let chan = NetUtil.newChannel({
+    uri: url,
+    loadUsingSystemPrincipal: true,
+  }).QueryInterface(Ci.nsIHttpChannel);
+  chan.loadFlags |= Ci.nsIRequest.LOAD_BYPASS_CACHE;
+  chan.loadFlags |= Ci.nsIRequest.INHIBIT_CACHING;
+  return chan;
+}
+
+function channelOpenPromise(chan, flags) {
+  return new Promise(resolve => {
+    function finish(req, buffer) {
+      resolve([req, buffer]);
+    }
+    chan.asyncOpen(new ChannelListener(finish, null, flags));
+  });
+}
+
+function makeURL(host) {
+  return `http://${host}:${httpServer.identity.primaryPort}/`;
+}
+
+add_task(async function test_localhost_offline() {
+  Services.io.offline = true;
+  Services.prefs.setBoolPref("network.disable-localhost-when-offline", false);
+  let chan = makeChan(makeURL("127.0.0.1"));
+  let [, resp] = await channelOpenPromise(chan);
+  Assert.equal(resp, body, "Should get correct response");
+
+  chan = makeChan(makeURL("localhost"));
+  [, resp] = await channelOpenPromise(chan);
+  Assert.equal(resp, body, "Should get response");
+
+  Services.prefs.setBoolPref("network.disable-localhost-when-offline", true);
+
+  chan = makeChan(makeURL("127.0.0.1"));
+  let [req] = await channelOpenPromise(
+    chan,
+    CL_ALLOW_UNKNOWN_CL | CL_EXPECT_FAILURE
+  );
+  req.QueryInterface(Ci.nsIHttpChannel);
+  Assert.equal(req.status, Cr.NS_ERROR_OFFLINE);
+
+  chan = makeChan(makeURL("localhost"));
+  [req] = await channelOpenPromise(
+    chan,
+    CL_ALLOW_UNKNOWN_CL | CL_EXPECT_FAILURE
+  );
+  req.QueryInterface(Ci.nsIHttpChannel);
+  Assert.equal(req.status, Cr.NS_ERROR_OFFLINE);
+
+  Services.prefs.clearUserPref("network.disable-localhost-when-offline");
+  Services.io.offline = false;
+});
+
+function run_test() {
+  httpServer = new HttpServer();
+  httpServer.registerPathHandler("/", (request, response) => {
+    response.seizePower();
+    response.write("HTTP/1.1 200 OK\r\n");
+    response.write("Content-Length: " + body.length + "\r\n");
+    response.write("\r\n");
+    response.write(body);
+    response.finish();
+  });
+  httpServer.start(-1);
+  run_next_test();
+}