1 files changed, 37 insertions, 0 deletions
diff --git a/devtools/client/memory/test/unit/test_action-select-snapshot.js b/devtools/client/memory/test/unit/test_action-select-snapshot.js
new file mode 100644
index 000000000..2329ab2fa
--- /dev/null
+++ b/devtools/client/memory/test/unit/test_action-select-snapshot.js
@@ -0,0 +1,37 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Tests the reducer responding to the action `selectSnapshot(snapshot)`
+ */
+
+let actions = require("devtools/client/memory/actions/snapshot");
+let { snapshotState: states } = require("devtools/client/memory/constants");
+
+function run_test() {
+  run_next_test();
+}
+
+add_task(function* () {
+  let front = new StubbedMemoryFront();
+  yield front.attach();
+  let store = Store();
+
+  for (let i = 0; i < 5; i++) {
+    store.dispatch(actions.takeSnapshot(front));
+  }
+
+  yield waitUntilState(store, ({ snapshots }) => snapshots.length === 5 && snapshots.every(isDone));
+
+  for (let i = 0; i < 5; i++) {
+    do_print(`Selecting snapshot[${i}]`);
+    store.dispatch(actions.selectSnapshot(store.getState().snapshots[i].id));
+    yield waitUntilState(store, ({ snapshots }) => snapshots[i].selected);
+
+    let { snapshots } = store.getState();
+    ok(snapshots[i].selected, `snapshot[${i}] selected`);
+    equal(snapshots.filter(s => !s.selected).length, 4, "All other snapshots are unselected");
+  }
+});
+
+function isDone(s) { return s.state === states.SAVED; }