From 57375c27524c828afd6ce58b299b2b4d35bda0a8 Mon Sep 17 00:00:00 2001
From: Dan Abramov <dan.abramov@gmail.com>
Date: Sat, 17 Oct 2015 16:00:20 +0300
Subject: [PATCH] Test that identity of computedStates is preserved when
 possible

---
 test/instrument.spec.js | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/test/instrument.spec.js b/test/instrument.spec.js
index 80754584..9db18896 100644
--- a/test/instrument.spec.js
+++ b/test/instrument.spec.js
@@ -250,6 +250,8 @@ describe('instrument', () => {
     monitoredStore.dispatch({ type: 'INCREMENT' });
     expect(reducerCalls).toBe(4);
 
+    let savedComputedStates = monitoredLiftedStore.getState().computedStates;
+
     monitoredLiftedStore.dispatch(ActionCreators.jumpToState(0));
     expect(reducerCalls).toBe(4);
 
@@ -258,6 +260,8 @@ describe('instrument', () => {
 
     monitoredLiftedStore.dispatch(ActionCreators.jumpToState(3));
     expect(reducerCalls).toBe(4);
+
+    expect(monitoredLiftedStore.getState().computedStates).toBe(savedComputedStates);
   });
 
 
@@ -272,11 +276,15 @@ describe('instrument', () => {
     monitoredStore.dispatch({ type: 'INCREMENT' });
     expect(reducerCalls).toBe(4);
 
+    let savedComputedStates = monitoredLiftedStore.getState().computedStates;
+
     monitoredLiftedStore.dispatch({ type: 'lol' });
     expect(reducerCalls).toBe(4);
 
     monitoredLiftedStore.dispatch({ type: 'wat' });
     expect(reducerCalls).toBe(4);
+
+    expect(monitoredLiftedStore.getState().computedStates).toBe(savedComputedStates);
   });
 
   describe('Import State', () => {