add parameters to ActionCreator.recomputeStates - esp. timestamps.

src/devTools.js

@@ -152,8 +152,11 @@ function liftReducer(reducer, initialState) {
       stagedActions = liftedAction.stagedActions;
       timestamps = liftedAction.timestamps;
       committedState = liftedAction.committedState;
-      currentStateIndex = stagedActions.length - 1;
-      skippedActions = {};
+      currentStateIndex = liftedAction.currentStateIndex;
+      if (currentStateIndex === -1) {
+        currentStateIndex = stagedActions.length - 1;
+      }
+      skippedActions = liftedAction.skippedActions;
       break;
     default:
       break;
@@ -247,11 +250,14 @@ export const ActionCreators = {
   setMonitorState(monitorState) {
     return { type: ActionTypes.SET_MONITOR_STATE, monitorState };
   },
-  recomputeStates(committedState, stagedActions) {
+  recomputeStates(committedState, stagedActions, timestamps, currentStateIndex=-1, skippedActions={}) {
     return {
       type: ActionTypes.RECOMPUTE_STATES,
       committedState,
-      stagedActions
+      stagedActions,
+      skippedActions,
+      timestamps,
+      currentStateIndex
     };
   }
 };

test/index.spec.js

@@ -0,0 +1,87 @@
+import expect from 'expect';
+import devTools, {ActionCreators as DAC} from '../src/devTools';
+import { createStore, compose } from 'redux';
+
+const reducer = function counter(state = 0, action) {
+  switch (action.type) {
+  case 'INC':
+    return state + 1;
+  case 'DEC':
+    return state - 1;
+  default:
+    return state;
+  }
+};
+
+
+const createDevStore = () => compose(devTools(), createStore)(reducer);
+
+describe('Recompute state', () => {
+
+  describe('export/import', () => {
+    let store;
+
+    // helpters
+    const getDevState = () => store.devToolsStore.getState();
+    const dispatch = (action) => store.devToolsStore.dispatch(action);
+    const recomputeExpectedState = (expState) => {
+      dispatch(DAC.recomputeStates(
+        expState.commitedState,
+        expState.stagedActions,
+        expState.timestamps,
+        expState.currentStateIndex,
+        expState.skippedActions
+      ));
+      return getDevState();
+    };
+
+    // create some timestamps
+    beforeEach((done) => {
+      store = createDevStore();
+      setTimeout(() => store.dispatch({type: 'INC'}), 3);
+      setTimeout(() => store.dispatch({type: 'INC'}), 6);
+      setTimeout(() => {
+        store.dispatch({type: 'INC'});
+        done();
+      }, 9);
+    });
+
+    it('should be possible to set the current index', () => {
+      dispatch(DAC.jumpToState(1));
+      const expState = getDevState();
+      dispatch(DAC.jumpToState(2));
+      const rcState = recomputeExpectedState(expState);
+
+      expect(rcState.currentStateIndex).toBe(expState.currentStateIndex);
+    });
+
+    it('currentStateIndex should be optional', () => {
+      const expState = getDevState();
+      dispatch(DAC.jumpToState(1));
+      const rcState = recomputeExpectedState({
+        ...expState,
+        currentStateIndex: undefined
+      });
+
+      expect(rcState.currentStateIndex).toBe(3);
+    });
+
+    it('should be possible to preserve skipped actions', () => {
+      dispatch(DAC.toggleAction(1));
+      const expState = getDevState();
+      dispatch(DAC.toggleAction(2));
+      const rcState = recomputeExpectedState(expState);
+
+      expect(rcState.skippedActions).toBe(expState.skippedActions);
+    });
+
+    it('should preserve timestamps', () => {
+      const expState = getDevState();
+      const rcState = recomputeExpectedState(expState);
+
+      expect(rcState.timestamps).toBe(expState.timestamps);
+    });
+
+  });
+
+});