tor-browser

commit cd9bb28c070b2873ad77a3d96456ce686b052e68
parent 3c3f7ac9ec21d9c0a0c941ae709f000bacefae3e
Author: Tom Ritter <tom@mozilla.com>
Date:   Mon, 29 Dec 2025 20:28:59 +0000

Bug 2005864: Add a test for the timezone metrics r=timhuang

Differential Revision: https://phabricator.services.mozilla.com/D276929

Diffstat:
M
toolkit/components/resistfingerprinting/tests/browser/browser.toml
 | 
2
++
A
toolkit/components/resistfingerprinting/tests/browser/browser_usercharacteristics_timezone.js
 | 
54
++++++++++++++++++++++++++++++++++++++++++++++++++++++

2 files changed, 56 insertions(+), 0 deletions(-)
diff --git a/toolkit/components/resistfingerprinting/tests/browser/browser.toml b/toolkit/components/resistfingerprinting/tests/browser/browser.toml
@@ -85,6 +85,8 @@ support-files = ["file_pdf.pdf"]
 ["browser_usercharacteristics_linux_distro.js"]
 skip-if = ["os != 'linux'"]
 
+["browser_usercharacteristics_timezone.js"]
+
 ["browser_worker_granular_overrides.js"]
 
 ["browser_worker_overrides.js"]
diff --git a/toolkit/components/resistfingerprinting/tests/browser/browser_usercharacteristics_timezone.js b/toolkit/components/resistfingerprinting/tests/browser/browser_usercharacteristics_timezone.js
@@ -0,0 +1,54 @@
+/* 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";
+
+add_task(async function test_timezone_metrics() {
+  info("Testing timezone metrics collection");
+
+  await BrowserTestUtils.withNewTab({ gBrowser, url: emptyPage }, () =>
+    GleanPings.userCharacteristics.testSubmission(
+      () => {
+        // Test timezone_web metric
+        const timezoneWeb = Glean.characteristics.timezoneWeb.testGetValue();
+        Assert.ok(timezoneWeb, "timezone_web should have a value");
+        Assert.notEqual(timezoneWeb, "", "timezone_web should not be empty");
+        info(`timezone_web: ${timezoneWeb}`);
+
+        // Test timezone_offset_web metric
+        const timezoneOffsetWeb =
+          Glean.characteristics.timezoneOffsetWeb.testGetValue();
+        Assert.strictEqual(
+          typeof timezoneOffsetWeb,
+          "number",
+          "timezone_offset_web should be a number"
+        );
+        info(`timezone_offset_web: ${timezoneOffsetWeb} minutes`);
+
+        // Timezone offset is typically in the range of -720 to +840 minutes
+        // (UTC-12 to UTC+14, though most are -12 to +12)
+        Assert.ok(
+          timezoneOffsetWeb >= -720 && timezoneOffsetWeb <= 840,
+          `timezone_offset_web (${timezoneOffsetWeb}) should be in valid range`
+        );
+      },
+      async () => {
+        const populated = TestUtils.topicObserved(
+          "user-characteristics-populating-data-done",
+          () => true
+        );
+        Services.obs.notifyObservers(
+          null,
+          "user-characteristics-testing-please-populate-data"
+        );
+        await populated;
+        GleanPings.userCharacteristics.submit();
+      }
+    )
+  );
+});