1 files changed, 52 insertions, 0 deletions
diff --git a/devtools/shared/heapsnapshot/tests/xpcshell/heap-snapshot-worker.js b/devtools/shared/heapsnapshot/tests/xpcshell/heap-snapshot-worker.js
new file mode 100644
index 0000000000..a79f442193
--- /dev/null
+++ b/devtools/shared/heapsnapshot/tests/xpcshell/heap-snapshot-worker.js
@@ -0,0 +1,52 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/* eslint-env worker */
+
+"use strict";
+
+console.log("Initializing worker.");
+
+self.onmessage = ex => {
+  console.log("Starting test.");
+  try {
+    ok(ChromeUtils, "Should have access to ChromeUtils in a worker.");
+    ok(HeapSnapshot, "Should have access to HeapSnapshot in a worker.");
+
+    const filePath = ChromeUtils.saveHeapSnapshot({ globals: [this] });
+    ok(true, "Should be able to save a snapshot.");
+
+    const snapshot = ChromeUtils.readHeapSnapshot(filePath);
+    ok(snapshot, "Should be able to read a heap snapshot");
+    ok(
+      HeapSnapshot.isInstance(snapshot),
+      "Should be an instanceof HeapSnapshot"
+    );
+  } catch (e) {
+    ok(
+      false,
+      "Unexpected error inside worker:\n" + e.toString() + "\n" + e.stack
+    );
+  } finally {
+    done();
+  }
+};
+
+// Proxy assertions to the main thread.
+function ok(val, msg) {
+  console.log("ok(" + !!val + ', "' + msg + '")');
+  self.postMessage({
+    type: "assertion",
+    passed: !!val,
+    msg,
+    stack: Error().stack,
+  });
+}
+
+// Tell the main thread we are done with the tests.
+function done() {
+  console.log("done()");
+  self.postMessage({
+    type: "done",
+  });
+}