1 files changed, 17 insertions, 0 deletions
diff --git a/devtools/client/debugger/src/actions/tests/sources-tree.spec.js b/devtools/client/debugger/src/actions/tests/sources-tree.spec.js
new file mode 100644
index 0000000000..916b2d015b
--- /dev/null
+++ b/devtools/client/debugger/src/actions/tests/sources-tree.spec.js
@@ -0,0 +1,17 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
+
+import { actions, selectors, createStore } from "../../utils/test-head";
+const { getExpandedState } = selectors;
+
+describe("source tree", () => {
+  it("should set the expanded state", () => {
+    const { dispatch, getState } = createStore();
+    const expandedState = new Set(["foo", "bar"]);
+
+    expect(getExpandedState(getState())).toEqual(new Set([]));
+    dispatch(actions.setExpandedState(expandedState));
+    expect(getExpandedState(getState())).toEqual(expandedState);
+  });
+});