1 files changed, 113 insertions, 0 deletions
diff --git a/netwerk/test/unit/test_http3_coalescing.js b/netwerk/test/unit/test_http3_coalescing.js
new file mode 100644
index 0000000000..b6c19ef626
--- /dev/null
+++ b/netwerk/test/unit/test_http3_coalescing.js
@@ -0,0 +1,113 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+var { setTimeout } = ChromeUtils.importESModule(
+  "resource://gre/modules/Timer.sys.mjs"
+);
+
+let h2Port;
+let h3Port;
+
+const certOverrideService = Cc[
+  "@mozilla.org/security/certoverride;1"
+].getService(Ci.nsICertOverrideService);
+
+function setup() {
+  h2Port = Services.env.get("MOZHTTP2_PORT");
+  Assert.notEqual(h2Port, null);
+  Assert.notEqual(h2Port, "");
+
+  h3Port = Services.env.get("MOZHTTP3_PORT");
+  Assert.notEqual(h3Port, null);
+  Assert.notEqual(h3Port, "");
+  Services.prefs.setBoolPref("network.http.http3.enable", true);
+}
+
+setup();
+registerCleanupFunction(async () => {
+  Services.prefs.clearUserPref("network.dns.upgrade_with_https_rr");
+  Services.prefs.clearUserPref("network.dns.use_https_rr_as_altsvc");
+  Services.prefs.clearUserPref("network.dns.echconfig.enabled");
+  Services.prefs.clearUserPref(
+    "network.dns.echconfig.fallback_to_origin_when_all_failed"
+  );
+  Services.prefs.clearUserPref("network.dns.httpssvc.reset_exclustion_list");
+  Services.prefs.clearUserPref("network.http.http3.enable");
+  Services.prefs.clearUserPref(
+    "network.dns.httpssvc.http3_fast_fallback_timeout"
+  );
+  Services.prefs.clearUserPref(
+    "network.http.http3.alt-svc-mapping-for-testing"
+  );
+  Services.prefs.clearUserPref("network.dns.localDomains");
+  Services.prefs.clearUserPref("network.http.speculative-parallel-limit");
+});
+
+function makeChan(url) {
+  let chan = NetUtil.newChannel({
+    uri: url,
+    loadUsingSystemPrincipal: true,
+    contentPolicyType: Ci.nsIContentPolicy.TYPE_DOCUMENT,
+  }).QueryInterface(Ci.nsIHttpChannel);
+  chan.loadFlags = Ci.nsIChannel.LOAD_INITIAL_DOCUMENT_URI;
+  return chan;
+}
+
+function channelOpenPromise(chan, flags) {
+  return new Promise(resolve => {
+    function finish(req, buffer) {
+      resolve([req, buffer]);
+      certOverrideService.setDisableAllSecurityChecksAndLetAttackersInterceptMyData(
+        false
+      );
+    }
+    certOverrideService.setDisableAllSecurityChecksAndLetAttackersInterceptMyData(
+      true
+    );
+    chan.asyncOpen(new ChannelListener(finish, null, flags));
+  });
+}
+
+async function H3CoalescingTest(host1, host2) {
+  Services.prefs.setCharPref(
+    "network.http.http3.alt-svc-mapping-for-testing",
+    `${host1};h3-29=:${h3Port}`
+  );
+  Services.prefs.setCharPref("network.dns.localDomains", host1);
+
+  let chan = makeChan(`https://${host1}`);
+  let [req] = await channelOpenPromise(chan, CL_ALLOW_UNKNOWN_CL);
+  req.QueryInterface(Ci.nsIHttpChannel);
+  Assert.equal(req.protocolVersion, "h3-29");
+  let hash = req.getResponseHeader("x-http3-conn-hash");
+
+  Services.prefs.setCharPref(
+    "network.http.http3.alt-svc-mapping-for-testing",
+    `${host2};h3-29=:${h3Port}`
+  );
+  Services.prefs.setCharPref("network.dns.localDomains", host2);
+
+  chan = makeChan(`https://${host2}`);
+  [req] = await channelOpenPromise(chan, CL_ALLOW_UNKNOWN_CL);
+  req.QueryInterface(Ci.nsIHttpChannel);
+  Assert.equal(req.protocolVersion, "h3-29");
+  // The port used by the second connection should be the same as the first one.
+  Assert.equal(req.getResponseHeader("x-http3-conn-hash"), hash);
+}
+
+add_task(async function testH3CoalescingWithSpeculativeConnection() {
+  await http3_setup_tests("h3-29");
+  Services.prefs.setIntPref("network.http.speculative-parallel-limit", 6);
+  await H3CoalescingTest("foo.h3_coalescing.org", "bar.h3_coalescing.org");
+});
+
+add_task(async function testH3CoalescingWithoutSpeculativeConnection() {
+  Services.prefs.setIntPref("network.http.speculative-parallel-limit", 0);
+  Services.obs.notifyObservers(null, "net:cancel-all-connections");
+  // eslint-disable-next-line mozilla/no-arbitrary-setTimeout
+  await new Promise(resolve => setTimeout(resolve, 1000));
+  await H3CoalescingTest("baz.h3_coalescing.org", "qux.h3_coalescing.org");
+});