Add a performance regression test

reduxjs · Sep 27, 2015 · 9f1e9c6 · 9f1e9c6
1 parent b529260
commit 9f1e9c6
Showing 1 changed file with 10 additions and 0 deletions.
diff --git a/test/devTools.spec.js b/test/devTools.spec.js
@@ -212,4 +212,14 @@ describe('devTools', () => {
     storeWithBug.dispatch({ type: 'SET_UNDEFINED' });
     expect(storeWithBug.getState()).toBe(2);
   });
+
+  it('should not recompute states on every action', () => {
+    let reducerCalls = 0;
+    let monitoredStore = devTools()(createStore)(() => reducerCalls++);
+    expect(reducerCalls).toBe(1);
+    monitoredStore.dispatch({ type: 'INCREMENT' });
+    monitoredStore.dispatch({ type: 'INCREMENT' });
+    monitoredStore.dispatch({ type: 'INCREMENT' });
+    expect(reducerCalls).toBe(4);
+  });
 });