1 files changed, 93 insertions, 0 deletions
diff --git a/netwerk/test/unit/test_tls13_disabled.js b/netwerk/test/unit/test_tls13_disabled.js
new file mode 100644
index 0000000000..3bcb6333aa
--- /dev/null
+++ b/netwerk/test/unit/test_tls13_disabled.js
@@ -0,0 +1,93 @@
+/* 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/. */
+
+registerCleanupFunction(async () => {
+  Services.prefs.clearUserPref("security.tls.version.max");
+  http3_clear_prefs();
+});
+
+let httpsUri;
+
+add_task(async function setup() {
+  let h2Port = Services.env.get("MOZHTTP2_PORT");
+  Assert.notEqual(h2Port, null);
+  Assert.notEqual(h2Port, "");
+  httpsUri = "https://foo.example.com:" + h2Port + "/";
+
+  await http3_setup_tests("h3");
+});
+
+let Listener = function () {};
+
+Listener.prototype = {
+  resumed: false,
+
+  onStartRequest: function testOnStartRequest(request) {
+    Assert.equal(request.status, Cr.NS_OK);
+    Assert.equal(request.responseStatus, 200);
+  },
+
+  onDataAvailable: function testOnDataAvailable(request, stream, off, cnt) {
+    read_stream(stream, cnt);
+  },
+
+  onStopRequest: function testOnStopRequest(request, status) {
+    let httpVersion = "";
+    try {
+      httpVersion = request.protocolVersion;
+    } catch (e) {}
+    if (this.expect_http3) {
+      Assert.equal(httpVersion, "h3");
+    } else {
+      Assert.notEqual(httpVersion, "h3");
+    }
+
+    this.finish();
+  },
+};
+
+function chanPromise(chan, listener) {
+  return new Promise(resolve => {
+    function finish(result) {
+      resolve(result);
+    }
+    listener.finish = finish;
+    chan.asyncOpen(listener);
+  });
+}
+
+function makeChan(uri) {
+  let chan = NetUtil.newChannel({
+    uri,
+    loadUsingSystemPrincipal: true,
+  }).QueryInterface(Ci.nsIHttpChannel);
+  chan.loadFlags = Ci.nsIChannel.LOAD_INITIAL_DOCUMENT_URI;
+  return chan;
+}
+
+async function test_http3_used(expect_http3) {
+  let listener = new Listener();
+  listener.expect_http3 = expect_http3;
+  let chan = makeChan(httpsUri);
+  await chanPromise(chan, listener);
+}
+
+add_task(async function test_tls13_pref() {
+  await test_http3_used(true);
+  // Try one more time.
+  await test_http3_used(true);
+
+  // Disable TLS1.3
+  Services.prefs.setIntPref("security.tls.version.max", 3);
+  await test_http3_used(false);
+  // Try one more time.
+  await test_http3_used(false);
+
+  // Enable TLS1.3
+  Services.obs.notifyObservers(null, "net:cancel-all-connections");
+  Services.prefs.setIntPref("security.tls.version.max", 4);
+  await test_http3_used(true);
+  // Try one more time.
+  await test_http3_used(true);
+});