1 files changed, 22 insertions, 0 deletions
diff --git a/devtools/server/tests/xpcshell/test_MemoryActor_saveHeapSnapshot_03.js b/devtools/server/tests/xpcshell/test_MemoryActor_saveHeapSnapshot_03.js
new file mode 100644
index 0000000000..b212abbced
--- /dev/null
+++ b/devtools/server/tests/xpcshell/test_MemoryActor_saveHeapSnapshot_03.js
@@ -0,0 +1,22 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Test that we can save full runtime heap snapshots when attached to the
+// ParentProcessTargetActor or a ContentProcessTargetActor.
+
+add_task(async () => {
+  const { memoryFront } = await createMainProcessMemoryFront();
+
+  const snapshotFilePath = await memoryFront.saveHeapSnapshot();
+  ok(
+    !!(await IOUtils.stat(snapshotFilePath)),
+    "Should have the heap snapshot file"
+  );
+  const snapshot = ChromeUtils.readHeapSnapshot(snapshotFilePath);
+  ok(
+    HeapSnapshot.isInstance(snapshot),
+    "And we should be able to read a HeapSnapshot instance from the file"
+  );
+});