1 files changed, 45 insertions, 0 deletions
diff --git a/devtools/client/memory/test/xpcshell/test_action-export-snapshot.js b/devtools/client/memory/test/xpcshell/test_action-export-snapshot.js
new file mode 100644
index 0000000000..c481ab1315
--- /dev/null
+++ b/devtools/client/memory/test/xpcshell/test_action-export-snapshot.js
@@ -0,0 +1,45 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Test exporting a snapshot to a user specified location on disk.
+
+const {
+  exportSnapshot,
+} = require("resource://devtools/client/memory/actions/io.js");
+const {
+  takeSnapshotAndCensus,
+} = require("resource://devtools/client/memory/actions/snapshot.js");
+const {
+  actions,
+  treeMapState,
+} = require("resource://devtools/client/memory/constants.js");
+
+add_task(async function () {
+  const front = new StubbedMemoryFront();
+  const heapWorker = new HeapAnalysesClient();
+  await front.attach();
+  const store = Store();
+  const { getState, dispatch } = store;
+
+  const destPath = await createTempFile();
+  dispatch(takeSnapshotAndCensus(front, heapWorker));
+  await waitUntilCensusState(store, snapshot => snapshot.treeMap, [
+    treeMapState.SAVED,
+  ]);
+
+  const exportEvents = Promise.all([
+    waitForDispatch(store, actions.EXPORT_SNAPSHOT_START),
+    waitForDispatch(store, actions.EXPORT_SNAPSHOT_END),
+  ]);
+  dispatch(exportSnapshot(getState().snapshots[0], destPath));
+  await exportEvents;
+
+  const stat = await IOUtils.stat(destPath);
+  info(stat.size);
+  Assert.greater(stat.size, 0, "destination file is more than 0 bytes");
+
+  heapWorker.destroy();
+  await front.detach();
+});