1 files changed, 82 insertions, 0 deletions
diff --git a/toolkit/devtools/performance/test/browser_perf-front-basic-timeline-01.js b/toolkit/devtools/performance/test/browser_perf-front-basic-timeline-01.js
new file mode 100644
index 000000000..256bface7
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+++ b/toolkit/devtools/performance/test/browser_perf-front-basic-timeline-01.js
@@ -0,0 +1,82 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Test basic functionality of PerformanceFront, retrieving timeline data.
+ */
+
+function spawnTest () {
+  let { target, front } = yield initBackend(SIMPLE_URL);
+
+  let lastMemoryDelta = 0;
+  let lastTickDelta = 0;
+
+  let counters = {
+    markers: [],
+    memory: [],
+    ticks: []
+  };
+
+  let deferreds = {
+    markers: Promise.defer(),
+    memory: Promise.defer(),
+    ticks: Promise.defer()
+  };
+
+  front.on("markers", handler);
+  front.on("memory", handler);
+  front.on("ticks", handler);
+
+  yield front.startRecording({ withMemory: true, withTicks: true });
+  yield Promise.all(Object.keys(deferreds).map(type => deferreds[type].promise));
+  yield front.stopRecording();
+
+  is(counters.markers.length, 1, "one marker event fired.");
+  is(counters.memory.length, 3, "three memory events fired.");
+  is(counters.ticks.length, 3, "three ticks events fired.");
+
+  yield removeTab(target.tab);
+  finish();
+
+  function handler (name, ...args) {
+    if (name === "markers") {
+      let [markers] = args;
+      ok(markers[0].start, "received atleast one marker with `start`");
+      ok(markers[0].end, "received atleast one marker with `end`");
+      ok(markers[0].name, "received atleast one marker with `name`");
+
+      counters.markers.push(markers);
+      front.off(name, handler);
+      deferreds[name].resolve();
+    }
+    else if (name === "memory") {
+      let [delta, measurement] = args;
+      is(typeof delta, "number", "received `delta` in memory event");
+      ok(delta > lastMemoryDelta, "received `delta` in memory event");
+      ok(measurement.total, "received `total` in memory event");
+
+      counters.memory.push({ delta, measurement });
+      lastMemoryDelta = delta;
+    }
+    else if (name === "ticks") {
+      let [delta, timestamps] = args;
+      ok(delta > lastTickDelta, "received `delta` in ticks event");
+
+      // Timestamps aren't guaranteed to always contain tick events, since
+      // they're dependent on the refresh driver, which may be blocked.
+
+      counters.ticks.push({ delta, timestamps });
+      lastTickDelta = delta;
+    }
+    else {
+      throw new Error("unknown event " + name);
+    }
+
+    if (name === "markers" && counters[name].length === 1 ||
+        name === "memory" && counters[name].length === 3 ||
+        name === "ticks" && counters[name].length === 3) {
+      front.off(name, handler);
+      deferreds[name].resolve();
+    }
+  };
+}