1 files changed, 166 insertions, 0 deletions
diff --git a/browser/components/resistfingerprinting/test/browser/browser_performanceAPI.js b/browser/components/resistfingerprinting/test/browser/browser_performanceAPI.js
new file mode 100644
index 0000000000..9126fe4690
--- /dev/null
+++ b/browser/components/resistfingerprinting/test/browser/browser_performanceAPI.js
@@ -0,0 +1,166 @@
+// ================================================================================================
+// ================================================================================================
+add_task(async function runRFPandRTPTests() {
+  // RFP = ResistFingerprinting / RTP = ReduceTimePrecision
+  let runTests = async function (data) {
+    let timerlist = data.list;
+    let labelType = data.resistFingerprinting
+      ? "ResistFingerprinting"
+      : "ReduceTimePrecision";
+    let expectedPrecision = data.precision;
+    // eslint beleives that isrounded is available in this scope, but if you
+    // remove the assignment, you will see it is not
+    // eslint-disable-next-line
+    let isRounded = eval(data.isRoundedFunc);
+
+    ok(
+      isRounded(content.performance.timeOrigin, expectedPrecision),
+      `For ${labelType}, performance.timeOrigin is not correctly rounded: ` +
+        content.performance.timeOrigin
+    );
+
+    // Check that whether the performance timing API is correctly spoofed.
+    for (let time of timerlist) {
+      if (
+        data.resistFingerprinting &&
+        (time == "domainLookupStart" || time == "domainLookupEnd")
+      ) {
+        is(
+          content.performance.timing[time],
+          content.performance.timing.fetchStart,
+          `For resistFingerprinting, the timing(${time}) is not correctly spoofed.`
+        );
+      } else {
+        ok(
+          isRounded(content.performance.timing[time], expectedPrecision),
+          `For ${labelType}(` +
+            expectedPrecision +
+            `), the timing(${time}) is not correctly rounded: ` +
+            content.performance.timing[time]
+        );
+      }
+    }
+
+    // Try to add some entries.
+    content.performance.mark("Test");
+    content.performance.mark("Test-End");
+    content.performance.measure("Test-Measure", "Test", "Test-End");
+
+    // Check the entries for performance.getEntries/getEntriesByType/getEntriesByName.
+    await new Promise(resolve => {
+      const paintObserver = new content.PerformanceObserver(() => {
+        resolve();
+      });
+      paintObserver.observe({ type: "paint", buffered: true });
+    });
+
+    is(
+      content.performance.getEntries().length,
+      5,
+      `For ${labelType}, there should be 4 entries for performance.getEntries()`
+      // PerformancePaintTiming, PerformanceNavigationTiming, PerformanceMark, PerformanceMark, PerformanceMeasure
+    );
+    for (var i = 0; i < 5; i++) {
+      let startTime = content.performance.getEntries()[i].startTime;
+      let duration = content.performance.getEntries()[i].duration;
+      ok(
+        isRounded(startTime, expectedPrecision),
+        `For ${labelType}(` +
+          expectedPrecision +
+          "), performance.getEntries(" +
+          i +
+          ").startTime is not rounded: " +
+          startTime
+      );
+      ok(
+        isRounded(duration, expectedPrecision),
+        `For ${labelType}(` +
+          expectedPrecision +
+          "), performance.getEntries(" +
+          i +
+          ").duration is not rounded: " +
+          duration
+      );
+    }
+    is(
+      content.performance.getEntriesByType("mark").length,
+      2,
+      `For ${labelType}, there should be 2 entries for performance.getEntriesByType()`
+    );
+    is(
+      content.performance.getEntriesByName("Test", "mark").length,
+      1,
+      `For ${labelType}, there should be 1 entry for performance.getEntriesByName()`
+    );
+    content.performance.clearMarks();
+    content.performance.clearMeasures();
+    content.performance.clearResourceTimings();
+  };
+
+  await setupPerformanceAPISpoofAndDisableTest(
+    true,
+    true,
+    false,
+    200,
+    runTests
+  );
+  await setupPerformanceAPISpoofAndDisableTest(
+    true,
+    true,
+    false,
+    100,
+    runTests
+  );
+  await setupPerformanceAPISpoofAndDisableTest(
+    true,
+    false,
+    false,
+    13,
+    runTests
+  );
+  await setupPerformanceAPISpoofAndDisableTest(
+    true,
+    false,
+    false,
+    0.13,
+    runTests
+  );
+  await setupPerformanceAPISpoofAndDisableTest(true, true, true, 100, runTests);
+  await setupPerformanceAPISpoofAndDisableTest(true, false, true, 13, runTests);
+  await setupPerformanceAPISpoofAndDisableTest(
+    true,
+    false,
+    true,
+    0.13,
+    runTests
+  );
+
+  await setupPerformanceAPISpoofAndDisableTest(
+    false,
+    true,
+    false,
+    100,
+    runTests
+  );
+  await setupPerformanceAPISpoofAndDisableTest(
+    false,
+    true,
+    false,
+    13,
+    runTests
+  );
+  await setupPerformanceAPISpoofAndDisableTest(
+    false,
+    true,
+    false,
+    0.13,
+    runTests
+  );
+  await setupPerformanceAPISpoofAndDisableTest(
+    false,
+    true,
+    true,
+    0.005,
+    runTests
+  );
+});