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Add performance regression tests

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This commit is contained in:
Dan Abramov 2015-09-27 20:13:38 +03:00
parent b5292609da
commit 092bb66d03
1 changed files with 31 additions and 0 deletions
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31
test/devTools.spec.js
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@ -212,4 +212,35 @@ 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);
});
it('should not recompute states when jumping to state', () => {
let reducerCalls = 0;
let monitoredStore = devTools()(createStore)(() => reducerCalls++);
let monitoredDevToolsStore = monitoredStore.devToolsStore;
expect(reducerCalls).toBe(1);
monitoredStore.dispatch({ type: 'INCREMENT' });
monitoredStore.dispatch({ type: 'INCREMENT' });
monitoredStore.dispatch({ type: 'INCREMENT' });
expect(reducerCalls).toBe(4);
monitoredDevToolsStore.dispatch(ActionCreators.jumpToState(0));
expect(reducerCalls).toBe(4);
monitoredDevToolsStore.dispatch(ActionCreators.jumpToState(1));
expect(reducerCalls).toBe(4);
monitoredDevToolsStore.dispatch(ActionCreators.jumpToState(3));
expect(reducerCalls).toBe(4);
});
});