1 files changed, 51 insertions, 0 deletions
diff --git a/toolkit/components/resistfingerprinting/tests/browser/browser_usercharacteristics.js b/toolkit/components/resistfingerprinting/tests/browser/browser_usercharacteristics.js
new file mode 100644
index 0000000000..9896948311
--- /dev/null
+++ b/toolkit/components/resistfingerprinting/tests/browser/browser_usercharacteristics.js
@@ -0,0 +1,51 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+const emptyPage =
+  getRootDirectory(gTestPath).replace(
+    "chrome://mochitests/content",
+    "https://example.com"
+  ) + "empty.html";
+
+function promiseObserverNotification() {
+  return TestUtils.topicObserved(
+    "user-characteristics-populating-data-done",
+    _ => {
+      var submitted = false;
+      GleanPings.userCharacteristics.testBeforeNextSubmit(_ => {
+        submitted = true;
+
+        // Did we assign a value we got out of about:fingerprinting?
+        // For now, we are sticking the test value in a random telemetry
+        // metric, but once we have a real metric, we'll update this
+        Assert.equal(
+          "Hello World",
+          Glean.characteristics.timezone.testGetValue()
+        );
+      });
+      GleanPings.userCharacteristics.submit();
+
+      return submitted;
+    }
+  );
+}
+
+add_task(async function run_test() {
+  info("Starting test...");
+
+  await BrowserTestUtils.withNewTab(
+    { gBrowser, url: emptyPage },
+    async function tabTask(_) {
+      let promise = promiseObserverNotification();
+
+      Services.obs.notifyObservers(
+        null,
+        "user-characteristics-testing-please-populate-data"
+      );
+
+      let submitted = await promise;
+      Assert.ok(submitted);
+    }
+  );
+});