1 files changed, 126 insertions, 0 deletions
diff --git a/browser/components/resistfingerprinting/test/browser/browser_hwconcurrency_etp_iframes.js b/browser/components/resistfingerprinting/test/browser/browser_hwconcurrency_etp_iframes.js
new file mode 100644
index 0000000000..47914e098e
--- /dev/null
+++ b/browser/components/resistfingerprinting/test/browser/browser_hwconcurrency_etp_iframes.js
@@ -0,0 +1,126 @@
+/**
+ * This test only tests values in the iframe, it does not test them on the framer
+ *
+ * Covers the following cases:
+ *  - RFP is disabled entirely
+ *  - RFP is enabled entirely in normal and PBM
+ *  - FPP is enabled entirely in normal and PBM
+ *
+ */
+
+"use strict";
+
+const SPOOFED_HW_CONCURRENCY = 2;
+
+const DEFAULT_HARDWARE_CONCURRENCY = navigator.hardwareConcurrency;
+
+// =============================================================================================
+// =============================================================================================
+
+async function testHWConcurrency(result, expectedResults, extraData) {
+  let testDesc = extraData.testDesc;
+
+  is(
+    result.hardwareConcurrency,
+    expectedResults.hardwareConcurrency,
+    `Checking ${testDesc} navigator.hardwareConcurrency.`
+  );
+}
+
+// The following are convenience objects that allow you to quickly see what is
+//   and is not modified from a logical set of values.
+// Be sure to always use `let expectedResults = structuredClone(allNotSpoofed)` to do a
+//   deep copy and avoiding corrupting the original 'const' object
+const allNotSpoofed = {
+  hardwareConcurrency: DEFAULT_HARDWARE_CONCURRENCY,
+};
+const allSpoofed = {
+  hardwareConcurrency: SPOOFED_HW_CONCURRENCY,
+};
+
+const uri = `https://${FRAMER_DOMAIN}/browser/browser/components/resistfingerprinting/test/browser/file_hwconcurrency_iframer.html?mode=iframe`;
+
+requestLongerTimeout(2);
+
+let extraData = {
+  etp_reload: true,
+};
+
+let expectedResults = {};
+
+expectedResults = structuredClone(allNotSpoofed);
+add_task(
+  defaultsTest.bind(null, uri, testHWConcurrency, expectedResults, extraData)
+);
+
+// The ETP toggle _does not_ override RFP, only FPP.
+expectedResults = structuredClone(allSpoofed);
+add_task(
+  simpleRFPTest.bind(null, uri, testHWConcurrency, expectedResults, extraData)
+);
+
+expectedResults = structuredClone(allSpoofed);
+add_task(
+  simplePBMRFPTest.bind(
+    null,
+    uri,
+    testHWConcurrency,
+    expectedResults,
+    extraData
+  )
+);
+
+expectedResults = structuredClone(allNotSpoofed);
+add_task(
+  simpleFPPTest.bind(null, uri, testHWConcurrency, expectedResults, extraData)
+);
+
+expectedResults = structuredClone(allNotSpoofed);
+add_task(
+  simplePBMFPPTest.bind(
+    null,
+    uri,
+    testHWConcurrency,
+    expectedResults,
+    extraData
+  )
+);
+
+// These test cases exercise the unusual configuration of RFP enabled in PBM and FPP enabled
+// in normal browsing mode.
+let extraPrefs = [
+  ["privacy.resistFingerprinting.pbmode", true],
+  ["privacy.fingerprintingProtection", true],
+  ["privacy.fingerprintingProtection.overrides", "+HardwareConcurrency"],
+];
+
+let this_extraData = structuredClone(extraData);
+this_extraData.testDesc =
+  "RFP enabled in PBM, FPP enabled globally, testing in normal browsing mode";
+expectedResults = allNotSpoofed;
+add_task(
+  defaultsTest.bind(
+    null,
+    uri,
+    testHWConcurrency,
+    structuredClone(expectedResults),
+    this_extraData,
+    structuredClone(extraPrefs)
+  )
+);
+
+this_extraData = structuredClone(extraData);
+this_extraData.testDesc =
+  "RFP enabled in PBM, FPP enabled globally, testing in PBM";
+this_extraData.private_window = true;
+expectedResults = allSpoofed;
+add_task(
+  defaultsTest.bind(
+    null,
+    uri,
+    testHWConcurrency,
+    structuredClone(expectedResults),
+    this_extraData,
+    structuredClone(extraPrefs)
+  )
+);