1 files changed, 96 insertions, 0 deletions
diff --git a/toolkit/components/antitracking/test/browser/browser_onModifyRequestNotificationForTrackingResources.js b/toolkit/components/antitracking/test/browser/browser_onModifyRequestNotificationForTrackingResources.js
new file mode 100644
index 0000000000..0674b87136
--- /dev/null
+++ b/toolkit/components/antitracking/test/browser/browser_onModifyRequestNotificationForTrackingResources.js
@@ -0,0 +1,96 @@
+/* eslint-disable mozilla/no-arbitrary-setTimeout */
+/**
+ * This test ensures that http-on-modify-request is dispatched for channels that
+ * are blocked by tracking protection.  It sets up a page with a third-party script
+ * resource on it that is blocked by TP, and sets up an http-on-modify-request
+ * observer which waits to be notified about that resource.  The test would time out
+ * if the http-on-modify-request notification isn't dispatched before the channel is
+ * canceled.
+ */
+
+let gExpectedResourcesSeen = 0;
+async function onModifyRequest() {
+  return new Promise((resolve, reject) => {
+    Services.obs.addObserver(function observer(subject, topic, data) {
+      let httpChannel = subject.QueryInterface(Ci.nsIHttpChannel);
+      let spec = httpChannel.URI.spec;
+      info("Observed channel for " + spec);
+      if (httpChannel.URI.prePath + "/" != TEST_3RD_PARTY_DOMAIN_TP) {
+        return;
+      }
+      if (spec.endsWith("empty.js")) {
+        ok(true, "Correct resource observed");
+        ++gExpectedResourcesSeen;
+      } else if (spec.endsWith("empty.js?redirect")) {
+        httpChannel.redirectTo(
+          Services.io.newURI(spec.replace("empty.js?redirect", "head.js"))
+        );
+      } else if (spec.endsWith("empty.js?redirect2")) {
+        httpChannel.suspend();
+        setTimeout(() => {
+          httpChannel.redirectTo(
+            Services.io.newURI(spec.replace("empty.js?redirect2", "head.js"))
+          );
+          httpChannel.resume();
+        }, 100);
+      } else if (spec.endsWith("head.js")) {
+        ++gExpectedResourcesSeen;
+      }
+      if (gExpectedResourcesSeen == 3) {
+        Services.obs.removeObserver(observer, "http-on-modify-request");
+        resolve();
+      }
+    }, "http-on-modify-request");
+  });
+}
+
+add_task(async function () {
+  info("Starting subResources test");
+
+  await SpecialPowers.flushPrefEnv();
+  await SpecialPowers.pushPrefEnv({
+    set: [
+      ["privacy.trackingprotection.enabled", true],
+      // the test doesn't open a private window, so we don't care about this pref's value
+      ["privacy.trackingprotection.pbmode.enabled", false],
+      // tracking annotations aren't needed in this test, only TP is needed
+      ["privacy.trackingprotection.annotate_channels", false],
+      [
+        "privacy.restrict3rdpartystorage.userInteractionRequiredForHosts",
+        "tracking.example.com,tracking.example.org",
+      ],
+      ["privacy.trackingprotection.testing.report_blocked_node", true],
+    ],
+  });
+
+  await UrlClassifierTestUtils.addTestTrackers();
+
+  let promise = onModifyRequest();
+
+  info("Creating a new tab");
+  let tab = BrowserTestUtils.addTab(gBrowser, TEST_EMBEDDER_PAGE);
+  gBrowser.selectedTab = tab;
+
+  let browser = gBrowser.getBrowserForTab(tab);
+  await BrowserTestUtils.browserLoaded(browser);
+
+  await promise;
+
+  info("Verify the number of tracking nodes found");
+  await SpecialPowers.spawn(
+    browser,
+    [{ expected: gExpectedResourcesSeen }],
+    async function (obj) {
+      is(
+        content.document.blockedNodeByClassifierCount,
+        obj.expected,
+        "Expected tracking nodes found"
+      );
+    }
+  );
+
+  info("Removing the tab");
+  BrowserTestUtils.removeTab(tab);
+
+  UrlClassifierTestUtils.cleanupTestTrackers();
+});