1 files changed, 71 insertions, 0 deletions
diff --git a/netwerk/test/browser/browser_103_preconnect.js b/netwerk/test/browser/browser_103_preconnect.js
new file mode 100644
index 0000000000..dcdcc1b138
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+++ b/netwerk/test/browser/browser_103_preconnect.js
@@ -0,0 +1,71 @@
+/* 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/. */
+
+Services.prefs.setBoolPref("network.early-hints.enabled", true);
+Services.prefs.setBoolPref("network.early-hints.preconnect.enabled", true);
+Services.prefs.setBoolPref("network.http.debug-observations", true);
+Services.prefs.setIntPref("network.early-hints.preconnect.max_connections", 10);
+
+registerCleanupFunction(function () {
+  Services.prefs.clearUserPref("network.early-hints.enabled");
+  Services.prefs.clearUserPref("network.early-hints.preconnect.enabled");
+  Services.prefs.clearUserPref("network.http.debug-observations");
+  Services.prefs.clearUserPref(
+    "network.early-hints.preconnect.max_connections"
+  );
+});
+
+// Test steps:
+// 1. Load early_hint_preconnect_html.sjs
+// 2. In early_hint_preconnect_html.sjs, a 103 response with
+//    "rel=preconnect" is returned.
+// 3. We use "speculative-connect-request" topic to observe whether the
+//    speculative connection is attempted.
+// 4. Finally, we check if the observed URL is the same as the expected.
+async function test_hint_preconnect(href, crossOrigin) {
+  let requestUrl = `https://example.com/browser/netwerk/test/browser/early_hint_preconnect_html.sjs?href=${href}&crossOrigin=${crossOrigin}`;
+
+  let observed = "";
+  let observer = {
+    QueryInterface: ChromeUtils.generateQI(["nsIObserver"]),
+    observe(aSubject, aTopic, aData) {
+      if (aTopic == "speculative-connect-request") {
+        Services.obs.removeObserver(observer, "speculative-connect-request");
+        observed = aData;
+      }
+    },
+  };
+  Services.obs.addObserver(observer, "speculative-connect-request");
+
+  await BrowserTestUtils.withNewTab(
+    {
+      gBrowser,
+      url: requestUrl,
+      waitForLoad: true,
+    },
+    async function () {}
+  );
+
+  // Extracting "localhost:443"
+  let hostPortRegex = /\[.*\](.*?)\^/;
+  let hostPortMatch = hostPortRegex.exec(observed);
+  let hostPort = hostPortMatch ? hostPortMatch[1] : "";
+  // Extracting "%28https%2Cexample.com%29"
+  let partitionKeyRegex = /\^partitionKey=(.*)$/;
+  let partitionKeyMatch = partitionKeyRegex.exec(observed);
+  let partitionKey = partitionKeyMatch ? partitionKeyMatch[1] : "";
+  // See nsHttpConnectionInfo::BuildHashKey, the second character is A if this
+  // is an anonymous connection.
+  let anonymousFlag = observed[2];
+
+  Assert.equal(anonymousFlag, crossOrigin === "use-credentials" ? "." : "A");
+  Assert.equal(hostPort, "localhost:443");
+  Assert.equal(partitionKey, "%28https%2Cexample.com%29");
+}
+
+add_task(async function test_103_preconnect() {
+  await test_hint_preconnect("https://localhost", "use-credentials");
+  await test_hint_preconnect("https://localhost", "");
+  await test_hint_preconnect("https://localhost", "anonymous");
+});