1 files changed, 55 insertions, 0 deletions
diff --git a/devtools/server/tests/browser/browser_markers-gc.js b/devtools/server/tests/browser/browser_markers-gc.js
new file mode 100644
index 0000000000..f7ad7553f8
--- /dev/null
+++ b/devtools/server/tests/browser/browser_markers-gc.js
@@ -0,0 +1,55 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Test that we get "GarbageCollection" markers.
+ */
+"use strict";
+
+const MARKER_NAME = "GarbageCollection";
+
+add_task(async function() {
+  const target = await addTabTarget(MAIN_DOMAIN + "doc_force_gc.html");
+  const front = await target.getFront("performance");
+  const rec = await front.startRecording({ withMarkers: true });
+
+  let markers = await waitForMarkerType(front, MARKER_NAME);
+  await front.stopRecording(rec);
+
+  ok(
+    markers.some(m => m.name === MARKER_NAME),
+    `got some ${MARKER_NAME} markers`
+  );
+  ok(
+    markers.every(({ causeName }) => typeof causeName === "string"),
+    "All markers have a causeName."
+  );
+  ok(
+    markers.every(({ cycle }) => typeof cycle === "number"),
+    "All markers have a `cycle` ID."
+  );
+
+  markers = rec.getMarkers();
+
+  // Bug 1197646
+  let ordered = true;
+  markers.reduce((previousStart, current, i) => {
+    if (i === 0) {
+      return current.start;
+    }
+    if (current.start < previousStart) {
+      ok(
+        false,
+        `markers must be in order. ${current.name} marker has later\
+        start time (${current.start}) thanprevious: ${previousStart}`
+      );
+      ordered = false;
+    }
+    return current.start;
+  });
+
+  is(ordered, true, "All GC and non-GC markers are in order by start time.");
+
+  await target.destroy();
+  gBrowser.removeCurrentTab();
+});