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Move instrumentation to redux-devtools-instrument

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This commit is contained in:
Zalmoxisus 2016-04-19 10:44:54 +03:00
parent 64f58b7010
commit 3c29e4b0f8
5 changed files with 4 additions and 1004 deletions
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3
package.json
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@ -63,6 +63,7 @@
"dependencies": {
"lodash": "^4.2.0",
"react-redux": "^4.0.0",
"redux": "^3.2.1"
"redux": "^3.2.1",
"redux-devtools-instrument": "^1.0.0"
}
}

2
src/createDevTools.js
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@ -1,6 +1,6 @@
import React, { Children, Component, PropTypes } from 'react';
import { connect } from 'react-redux';
import instrument from './instrument';
import instrument from 'redux-devtools-instrument';
export default function createDevTools(children) {
const monitorElement = Children.only(children);

2
src/index.js
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@ -1,3 +1,3 @@
export { default as instrument, ActionCreators, ActionTypes } from './instrument';
export { default as instrument, ActionCreators, ActionTypes } from 'redux-devtools-instrument';
export { default as persistState } from './persistState';
export { default as createDevTools } from './createDevTools';

450
src/instrument.js
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@ -1,450 +0,0 @@
import difference from 'lodash/difference';
import union from 'lodash/union';
export const ActionTypes = {
PERFORM_ACTION: 'PERFORM_ACTION',
RESET: 'RESET',
ROLLBACK: 'ROLLBACK',
COMMIT: 'COMMIT',
SWEEP: 'SWEEP',
TOGGLE_ACTION: 'TOGGLE_ACTION',
SET_ACTIONS_ACTIVE: 'SET_ACTIONS_ACTIVE',
JUMP_TO_STATE: 'JUMP_TO_STATE',
IMPORT_STATE: 'IMPORT_STATE'
};
/**
* Action creators to change the History state.
*/
export const ActionCreators = {
performAction(action) {
if (typeof action.type === 'undefined') {
throw new Error(
'Actions may not have an undefined "type" property. ' +
'Have you misspelled a constant?'
);
}
return { type: ActionTypes.PERFORM_ACTION, action, timestamp: Date.now() };
},
reset() {
return { type: ActionTypes.RESET, timestamp: Date.now() };
},
rollback() {
return { type: ActionTypes.ROLLBACK, timestamp: Date.now() };
},
commit() {
return { type: ActionTypes.COMMIT, timestamp: Date.now() };
},
sweep() {
return { type: ActionTypes.SWEEP };
},
toggleAction(id) {
return { type: ActionTypes.TOGGLE_ACTION, id };
},
setActionsActive(start, end, active=true) {
return { type: ActionTypes.SET_ACTIONS_ACTIVE, start, end, active };
},
jumpToState(index) {
return { type: ActionTypes.JUMP_TO_STATE, index };
},
importState(nextLiftedState) {
return { type: ActionTypes.IMPORT_STATE, nextLiftedState };
}
};
const INIT_ACTION = { type: '@@INIT' };
/**
* Computes the next entry in the log by applying an action.
*/
function computeNextEntry(reducer, action, state, error) {
if (error) {
return {
state,
error: 'Interrupted by an error up the chain'
};
}
let nextState = state;
let nextError;
try {
nextState = reducer(state, action);
} catch (err) {
nextError = err.toString();
if (typeof window === 'object' && typeof window.chrome !== 'undefined') {
// In Chrome, rethrowing provides better source map support
setTimeout(() => { throw err; });
} else {
console.error(err);
}
}
return {
state: nextState,
error: nextError
};
}
/**
* Runs the reducer on invalidated actions to get a fresh computation log.
*/
function recomputeStates(
computedStates,
minInvalidatedStateIndex,
reducer,
committedState,
actionsById,
stagedActionIds,
skippedActionIds
) {
// Optimization: exit early and return the same reference
// if we know nothing could have changed.
if (
minInvalidatedStateIndex >= computedStates.length &&
computedStates.length === stagedActionIds.length
) {
return computedStates;
}
const nextComputedStates = computedStates.slice(0, minInvalidatedStateIndex);
for (let i = minInvalidatedStateIndex; i < stagedActionIds.length; i++) {
const actionId = stagedActionIds[i];
const action = actionsById[actionId].action;
const previousEntry = nextComputedStates[i - 1];
const previousState = previousEntry ? previousEntry.state : committedState;
const previousError = previousEntry ? previousEntry.error : undefined;
const shouldSkip = skippedActionIds.indexOf(actionId) > -1;
const entry = shouldSkip ?
previousEntry :
computeNextEntry(reducer, action, previousState, previousError);
nextComputedStates.push(entry);
}
return nextComputedStates;
}
/**
* Lifts an app's action into an action on the lifted store.
*/
function liftAction(action) {
return ActionCreators.performAction(action);
}
/**
* Creates a history state reducer from an app's reducer.
*/
function liftReducerWith(reducer, initialCommittedState, monitorReducer, options) {
const initialLiftedState = {
monitorState: monitorReducer(undefined, {}),
nextActionId: 1,
actionsById: { 0: liftAction(INIT_ACTION) },
stagedActionIds: [0],
skippedActionIds: [],
committedState: initialCommittedState,
currentStateIndex: 0,
computedStates: []
};
/**
* Manages how the history actions modify the history state.
*/
return (liftedState = initialLiftedState, liftedAction) => {
let {
monitorState,
actionsById,
nextActionId,
stagedActionIds,
skippedActionIds,
committedState,
currentStateIndex,
computedStates
} = liftedState;
function commitExcessActions(n) {
// Auto-commits n-number of excess actions.
let excess = n;
let idsToDelete = stagedActionIds.slice(1, excess + 1);
for (let i = 0; i < idsToDelete.length; i++) {
if (computedStates[i + 1].error) {
// Stop if error is found. Commit actions up to error.
excess = i;
idsToDelete = stagedActionIds.slice(1, excess + 1);
break;
} else {
delete actionsById[idsToDelete[i]];
}
}
skippedActionIds = skippedActionIds.filter(id => idsToDelete.indexOf(id) === -1);
stagedActionIds = [0, ...stagedActionIds.slice(excess + 1)];
committedState = computedStates[excess].state;
computedStates = computedStates.slice(excess);
currentStateIndex = currentStateIndex > excess
? currentStateIndex - excess
: 0;
}
// By default, agressively recompute every state whatever happens.
// This has O(n) performance, so we'll override this to a sensible
// value whenever we feel like we don't have to recompute the states.
let minInvalidatedStateIndex = 0;
switch (liftedAction.type) {
case ActionTypes.RESET: {
// Get back to the state the store was created with.
actionsById = { 0: liftAction(INIT_ACTION) };
nextActionId = 1;
stagedActionIds = [0];
skippedActionIds = [];
committedState = initialCommittedState;
currentStateIndex = 0;
computedStates = [];
break;
}
case ActionTypes.COMMIT: {
// Consider the last committed state the new starting point.
// Squash any staged actions into a single committed state.
actionsById = { 0: liftAction(INIT_ACTION) };
nextActionId = 1;
stagedActionIds = [0];
skippedActionIds = [];
committedState = computedStates[currentStateIndex].state;
currentStateIndex = 0;
computedStates = [];
break;
}
case ActionTypes.ROLLBACK: {
// Forget about any staged actions.
// Start again from the last committed state.
actionsById = { 0: liftAction(INIT_ACTION) };
nextActionId = 1;
stagedActionIds = [0];
skippedActionIds = [];
currentStateIndex = 0;
computedStates = [];
break;
}
case ActionTypes.TOGGLE_ACTION: {
// Toggle whether an action with given ID is skipped.
// Being skipped means it is a no-op during the computation.
const { id: actionId } = liftedAction;
const index = skippedActionIds.indexOf(actionId);
if (index === -1) {
skippedActionIds = [actionId, ...skippedActionIds];
} else {
skippedActionIds = skippedActionIds.filter(id => id !== actionId);
}
// Optimization: we know history before this action hasn't changed
minInvalidatedStateIndex = stagedActionIds.indexOf(actionId);
break;
}
case ActionTypes.SET_ACTIONS_ACTIVE: {
// Toggle whether an action with given ID is skipped.
// Being skipped means it is a no-op during the computation.
const { start, end, active } = liftedAction;
const actionIds = [];
for (let i = start; i < end; i++) actionIds.push(i);
if (active) {
skippedActionIds = difference(skippedActionIds, actionIds);
} else {
skippedActionIds = union(skippedActionIds, actionIds);
}
// Optimization: we know history before this action hasn't changed
minInvalidatedStateIndex = stagedActionIds.indexOf(start);
break;
}
case ActionTypes.JUMP_TO_STATE: {
// Without recomputing anything, move the pointer that tell us
// which state is considered the current one. Useful for sliders.
currentStateIndex = liftedAction.index;
// Optimization: we know the history has not changed.
minInvalidatedStateIndex = Infinity;
break;
}
case ActionTypes.SWEEP: {
// Forget any actions that are currently being skipped.
stagedActionIds = difference(stagedActionIds, skippedActionIds);
skippedActionIds = [];
currentStateIndex = Math.min(currentStateIndex, stagedActionIds.length - 1);
break;
}
case ActionTypes.PERFORM_ACTION: {
// Auto-commit as new actions come in.
if (options.maxAge && stagedActionIds.length === options.maxAge) {
commitExcessActions(1);
}
if (currentStateIndex === stagedActionIds.length - 1) {
currentStateIndex++;
}
const actionId = nextActionId++;
// Mutation! This is the hottest path, and we optimize on purpose.
// It is safe because we set a new key in a cache dictionary.
actionsById[actionId] = liftedAction;
stagedActionIds = [...stagedActionIds, actionId];
// Optimization: we know that only the new action needs computing.
minInvalidatedStateIndex = stagedActionIds.length - 1;
break;
}
case ActionTypes.IMPORT_STATE: {
// Completely replace everything.
({
monitorState,
actionsById,
nextActionId,
stagedActionIds,
skippedActionIds,
committedState,
currentStateIndex,
computedStates
} = liftedAction.nextLiftedState);
break;
}
case '@@redux/INIT': {
// Always recompute states on hot reload and init.
minInvalidatedStateIndex = 0;
if (options.maxAge && stagedActionIds.length > options.maxAge) {
// States must be recomputed before committing excess.
computedStates = recomputeStates(
computedStates,
minInvalidatedStateIndex,
reducer,
committedState,
actionsById,
stagedActionIds,
skippedActionIds
);
commitExcessActions(stagedActionIds.length - options.maxAge);
// Avoid double computation.
minInvalidatedStateIndex = Infinity;
}
break;
}
default: {
// If the action is not recognized, it's a monitor action.
// Optimization: a monitor action can't change history.
minInvalidatedStateIndex = Infinity;
break;
}
}
computedStates = recomputeStates(
computedStates,
minInvalidatedStateIndex,
reducer,
committedState,
actionsById,
stagedActionIds,
skippedActionIds
);
monitorState = monitorReducer(monitorState, liftedAction);
return {
monitorState,
actionsById,
nextActionId,
stagedActionIds,
skippedActionIds,
committedState,
currentStateIndex,
computedStates
};
};
}
/**
* Provides an app's view into the state of the lifted store.
*/
function unliftState(liftedState) {
const { computedStates, currentStateIndex } = liftedState;
const { state } = computedStates[currentStateIndex];
return state;
}
/**
* Provides an app's view into the lifted store.
*/
function unliftStore(liftedStore, liftReducer) {
let lastDefinedState;
return {
...liftedStore,
liftedStore,
dispatch(action) {
liftedStore.dispatch(liftAction(action));
return action;
},
getState() {
const state = unliftState(liftedStore.getState());
if (state !== undefined) {
lastDefinedState = state;
}
return lastDefinedState;
},
replaceReducer(nextReducer) {
liftedStore.replaceReducer(liftReducer(nextReducer));
}
};
}
/**
* Redux instrumentation store enhancer.
*/
export default function instrument(monitorReducer = () => null, options = {}) {
/* eslint-disable no-eq-null */
if (options.maxAge != null && options.maxAge < 2) {
/* eslint-enable */
throw new Error(
'DevTools.instrument({ maxAge }) option, if specified, ' +
'may not be less than 2.'
);
}
return createStore => (reducer, initialState, enhancer) => {
function liftReducer(r) {
if (typeof r !== 'function') {
if (r && typeof r.default === 'function') {
throw new Error(
'Expected the reducer to be a function. ' +
'Instead got an object with a "default" field. ' +
'Did you pass a module instead of the default export? ' +
'Try passing require(...).default instead.'
);
}
throw new Error('Expected the reducer to be a function.');
}
return liftReducerWith(r, initialState, monitorReducer, options);
}
const liftedStore = createStore(liftReducer(reducer), enhancer);
if (liftedStore.liftedStore) {
throw new Error(
'DevTools instrumentation should not be applied more than once. ' +
'Check your store configuration.'
);
}
return unliftStore(liftedStore, liftReducer);
};
}

551
test/instrument.spec.js
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@ -1,551 +0,0 @@
import expect, { spyOn } from 'expect';
import { createStore, compose } from 'redux';
import instrument, { ActionCreators } from '../src/instrument';
function counter(state = 0, action) {
switch (action.type) {
case 'INCREMENT': return state + 1;
case 'DECREMENT': return state - 1;
default: return state;
}
}
function counterWithBug(state = 0, action) {
switch (action.type) {
case 'INCREMENT': return state + 1;
case 'DECREMENT': return mistake - 1; // eslint-disable-line no-undef
case 'SET_UNDEFINED': return undefined;
default: return state;
}
}
function counterWithAnotherBug(state = 0, action) {
switch (action.type) {
case 'INCREMENT': return mistake + 1; // eslint-disable-line no-undef
case 'DECREMENT': return state - 1;
case 'SET_UNDEFINED': return undefined;
default: return state;
}
}
function doubleCounter(state = 0, action) {
switch (action.type) {
case 'INCREMENT': return state + 2;
case 'DECREMENT': return state - 2;
default: return state;
}
}
describe('instrument', () => {
let store;
let liftedStore;
beforeEach(() => {
store = createStore(counter, instrument());
liftedStore = store.liftedStore;
});
it('should perform actions', () => {
expect(store.getState()).toBe(0);
store.dispatch({ type: 'INCREMENT' });
expect(store.getState()).toBe(1);
store.dispatch({ type: 'INCREMENT' });
expect(store.getState()).toBe(2);
});
it('should rollback state to the last committed state', () => {
store.dispatch({ type: 'INCREMENT' });
store.dispatch({ type: 'INCREMENT' });
expect(store.getState()).toBe(2);
liftedStore.dispatch(ActionCreators.commit());
expect(store.getState()).toBe(2);
store.dispatch({ type: 'INCREMENT' });
store.dispatch({ type: 'INCREMENT' });
expect(store.getState()).toBe(4);
liftedStore.dispatch(ActionCreators.rollback());
expect(store.getState()).toBe(2);
store.dispatch({ type: 'DECREMENT' });
expect(store.getState()).toBe(1);
liftedStore.dispatch(ActionCreators.rollback());
expect(store.getState()).toBe(2);
});
it('should reset to initial state', () => {
store.dispatch({ type: 'INCREMENT' });
expect(store.getState()).toBe(1);
liftedStore.dispatch(ActionCreators.commit());
expect(store.getState()).toBe(1);
store.dispatch({ type: 'INCREMENT' });
expect(store.getState()).toBe(2);
liftedStore.dispatch(ActionCreators.rollback());
expect(store.getState()).toBe(1);
store.dispatch({ type: 'INCREMENT' });
expect(store.getState()).toBe(2);
liftedStore.dispatch(ActionCreators.reset());
expect(store.getState()).toBe(0);
});
it('should toggle an action', () => {
// actionId 0 = @@INIT
store.dispatch({ type: 'INCREMENT' });
store.dispatch({ type: 'DECREMENT' });
store.dispatch({ type: 'INCREMENT' });
expect(store.getState()).toBe(1);
liftedStore.dispatch(ActionCreators.toggleAction(2));
expect(store.getState()).toBe(2);
liftedStore.dispatch(ActionCreators.toggleAction(2));
expect(store.getState()).toBe(1);
});
it('should set multiple action skip', () => {
// actionId 0 = @@INIT
store.dispatch({ type: 'INCREMENT' });
store.dispatch({ type: 'INCREMENT' });
store.dispatch({ type: 'INCREMENT' });
expect(store.getState()).toBe(3);
liftedStore.dispatch(ActionCreators.setActionsActive(1, 3, false));
expect(store.getState()).toBe(1);
liftedStore.dispatch(ActionCreators.setActionsActive(0, 2, true));
expect(store.getState()).toBe(2);
liftedStore.dispatch(ActionCreators.setActionsActive(0, 1, true));
expect(store.getState()).toBe(2);
});
it('should sweep disabled actions', () => {
// actionId 0 = @@INIT
store.dispatch({ type: 'INCREMENT' });
store.dispatch({ type: 'DECREMENT' });
store.dispatch({ type: 'INCREMENT' });
store.dispatch({ type: 'INCREMENT' });
expect(store.getState()).toBe(2);
expect(liftedStore.getState().stagedActionIds).toEqual([0, 1, 2, 3, 4]);
expect(liftedStore.getState().skippedActionIds).toEqual([]);
liftedStore.dispatch(ActionCreators.toggleAction(2));
expect(store.getState()).toBe(3);
expect(liftedStore.getState().stagedActionIds).toEqual([0, 1, 2, 3, 4]);
expect(liftedStore.getState().skippedActionIds).toEqual([2]);
liftedStore.dispatch(ActionCreators.sweep());
expect(store.getState()).toBe(3);
expect(liftedStore.getState().stagedActionIds).toEqual([0, 1, 3, 4]);
expect(liftedStore.getState().skippedActionIds).toEqual([]);
});
it('should jump to state', () => {
store.dispatch({ type: 'INCREMENT' });
store.dispatch({ type: 'DECREMENT' });
store.dispatch({ type: 'INCREMENT' });
expect(store.getState()).toBe(1);
liftedStore.dispatch(ActionCreators.jumpToState(0));
expect(store.getState()).toBe(0);
liftedStore.dispatch(ActionCreators.jumpToState(1));
expect(store.getState()).toBe(1);
liftedStore.dispatch(ActionCreators.jumpToState(2));
expect(store.getState()).toBe(0);
store.dispatch({ type: 'INCREMENT' });
expect(store.getState()).toBe(0);
liftedStore.dispatch(ActionCreators.jumpToState(4));
expect(store.getState()).toBe(2);
});
it('should replace the reducer', () => {
store.dispatch({ type: 'INCREMENT' });
store.dispatch({ type: 'DECREMENT' });
store.dispatch({ type: 'INCREMENT' });
expect(store.getState()).toBe(1);
store.replaceReducer(doubleCounter);
expect(store.getState()).toBe(2);
});
it('should catch and record errors', () => {
let spy = spyOn(console, 'error');
let storeWithBug = createStore(counterWithBug, instrument());
storeWithBug.dispatch({ type: 'INCREMENT' });
storeWithBug.dispatch({ type: 'DECREMENT' });
storeWithBug.dispatch({ type: 'INCREMENT' });
let { computedStates } = storeWithBug.liftedStore.getState();
expect(computedStates[2].error).toMatch(
/ReferenceError/
);
expect(computedStates[3].error).toMatch(
/Interrupted by an error up the chain/
);
expect(spy.calls[0].arguments[0].toString()).toMatch(
/ReferenceError/
);
spy.restore();
});
it('should catch invalid action type', () => {
expect(() => {
store.dispatch({ type: undefined });
}).toThrow(
'Actions may not have an undefined "type" property. ' +
'Have you misspelled a constant?'
);
});
it('should return the last non-undefined state from getState', () => {
let storeWithBug = createStore(counterWithBug, instrument());
storeWithBug.dispatch({ type: 'INCREMENT' });
storeWithBug.dispatch({ type: 'INCREMENT' });
expect(storeWithBug.getState()).toBe(2);
storeWithBug.dispatch({ type: 'SET_UNDEFINED' });
expect(storeWithBug.getState()).toBe(2);
});
it('should not recompute states on every action', () => {
let reducerCalls = 0;
let monitoredStore = createStore(() => reducerCalls++, instrument());
expect(reducerCalls).toBe(1);
monitoredStore.dispatch({ type: 'INCREMENT' });
monitoredStore.dispatch({ type: 'INCREMENT' });
monitoredStore.dispatch({ type: 'INCREMENT' });
expect(reducerCalls).toBe(4);
});
it('should not recompute old states when toggling an action', () => {
let reducerCalls = 0;
let monitoredStore = createStore(() => reducerCalls++, instrument());
let monitoredLiftedStore = monitoredStore.liftedStore;
expect(reducerCalls).toBe(1);
// actionId 0 = @@INIT
monitoredStore.dispatch({ type: 'INCREMENT' });
monitoredStore.dispatch({ type: 'INCREMENT' });
monitoredStore.dispatch({ type: 'INCREMENT' });
expect(reducerCalls).toBe(4);
monitoredLiftedStore.dispatch(ActionCreators.toggleAction(3));
expect(reducerCalls).toBe(4);
monitoredLiftedStore.dispatch(ActionCreators.toggleAction(3));
expect(reducerCalls).toBe(5);
monitoredLiftedStore.dispatch(ActionCreators.toggleAction(2));
expect(reducerCalls).toBe(6);
monitoredLiftedStore.dispatch(ActionCreators.toggleAction(2));
expect(reducerCalls).toBe(8);
monitoredLiftedStore.dispatch(ActionCreators.toggleAction(1));
expect(reducerCalls).toBe(10);
monitoredLiftedStore.dispatch(ActionCreators.toggleAction(2));
expect(reducerCalls).toBe(11);
monitoredLiftedStore.dispatch(ActionCreators.toggleAction(3));
expect(reducerCalls).toBe(11);
monitoredLiftedStore.dispatch(ActionCreators.toggleAction(1));
expect(reducerCalls).toBe(12);
monitoredLiftedStore.dispatch(ActionCreators.toggleAction(3));
expect(reducerCalls).toBe(13);
monitoredLiftedStore.dispatch(ActionCreators.toggleAction(2));
expect(reducerCalls).toBe(15);
});
it('should not recompute states when jumping to state', () => {
let reducerCalls = 0;
let monitoredStore = createStore(() => reducerCalls++, instrument());
let monitoredLiftedStore = monitoredStore.liftedStore;
expect(reducerCalls).toBe(1);
monitoredStore.dispatch({ type: 'INCREMENT' });
monitoredStore.dispatch({ type: 'INCREMENT' });
monitoredStore.dispatch({ type: 'INCREMENT' });
expect(reducerCalls).toBe(4);
let savedComputedStates = monitoredLiftedStore.getState().computedStates;
monitoredLiftedStore.dispatch(ActionCreators.jumpToState(0));
expect(reducerCalls).toBe(4);
monitoredLiftedStore.dispatch(ActionCreators.jumpToState(1));
expect(reducerCalls).toBe(4);
monitoredLiftedStore.dispatch(ActionCreators.jumpToState(3));
expect(reducerCalls).toBe(4);
expect(monitoredLiftedStore.getState().computedStates).toBe(savedComputedStates);
});
it('should not recompute states on monitor actions', () => {
let reducerCalls = 0;
let monitoredStore = createStore(() => reducerCalls++, instrument());
let monitoredLiftedStore = monitoredStore.liftedStore;
expect(reducerCalls).toBe(1);
monitoredStore.dispatch({ type: 'INCREMENT' });
monitoredStore.dispatch({ type: 'INCREMENT' });
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('maxAge option', () => {
let configuredStore;
let configuredLiftedStore;
beforeEach(() => {
configuredStore = createStore(counter, instrument(undefined, { maxAge: 3 }));
configuredLiftedStore = configuredStore.liftedStore;
});
it('should auto-commit earliest non-@@INIT action when maxAge is reached', () => {
configuredStore.dispatch({ type: 'INCREMENT' });
configuredStore.dispatch({ type: 'INCREMENT' });
let liftedStoreState = configuredLiftedStore.getState();
expect(configuredStore.getState()).toBe(2);
expect(Object.keys(liftedStoreState.actionsById).length).toBe(3);
expect(liftedStoreState.committedState).toBe(undefined);
expect(liftedStoreState.stagedActionIds).toInclude(1);
// Trigger auto-commit.
configuredStore.dispatch({ type: 'INCREMENT' });
liftedStoreState = configuredLiftedStore.getState();
expect(configuredStore.getState()).toBe(3);
expect(Object.keys(liftedStoreState.actionsById).length).toBe(3);
expect(liftedStoreState.stagedActionIds).toExclude(1);
expect(liftedStoreState.computedStates[0].state).toBe(1);
expect(liftedStoreState.committedState).toBe(1);
expect(liftedStoreState.currentStateIndex).toBe(2);
});
it('should remove skipped actions once committed', () => {
configuredStore.dispatch({ type: 'INCREMENT' });
configuredLiftedStore.dispatch(ActionCreators.toggleAction(1));
configuredStore.dispatch({ type: 'INCREMENT' });
expect(configuredLiftedStore.getState().skippedActionIds).toInclude(1);
configuredStore.dispatch({ type: 'INCREMENT' });
expect(configuredLiftedStore.getState().skippedActionIds).toExclude(1);
});
it('should not auto-commit errors', () => {
let spy = spyOn(console, 'error');
let storeWithBug = createStore(counterWithBug, instrument(undefined, { maxAge: 3 }));
let liftedStoreWithBug = storeWithBug.liftedStore;
storeWithBug.dispatch({ type: 'DECREMENT' });
storeWithBug.dispatch({ type: 'INCREMENT' });
expect(liftedStoreWithBug.getState().stagedActionIds.length).toBe(3);
storeWithBug.dispatch({ type: 'INCREMENT' });
expect(liftedStoreWithBug.getState().stagedActionIds.length).toBe(4);
spy.restore();
});
it('should auto-commit actions after hot reload fixes error', () => {
let spy = spyOn(console, 'error');
let storeWithBug = createStore(counterWithBug, instrument(undefined, { maxAge: 3 }));
let liftedStoreWithBug = storeWithBug.liftedStore;
storeWithBug.dispatch({ type: 'DECREMENT' });
storeWithBug.dispatch({ type: 'DECREMENT' });
storeWithBug.dispatch({ type: 'INCREMENT' });
storeWithBug.dispatch({ type: 'DECREMENT' });
storeWithBug.dispatch({ type: 'DECREMENT' });
storeWithBug.dispatch({ type: 'DECREMENT' });
expect(liftedStoreWithBug.getState().stagedActionIds.length).toBe(7);
// Auto-commit 2 actions by "fixing" reducer bug, but introducing another.
storeWithBug.replaceReducer(counterWithAnotherBug);
expect(liftedStoreWithBug.getState().stagedActionIds.length).toBe(5);
// Auto-commit 2 more actions by "fixing" other reducer bug.
storeWithBug.replaceReducer(counter);
expect(liftedStoreWithBug.getState().stagedActionIds.length).toBe(3);
spy.restore();
});
it('should update currentStateIndex when auto-committing', () => {
let liftedStoreState;
let currentComputedState;
configuredStore.dispatch({ type: 'INCREMENT' });
configuredStore.dispatch({ type: 'INCREMENT' });
liftedStoreState = configuredLiftedStore.getState();
expect(liftedStoreState.currentStateIndex).toBe(2);
// currentStateIndex should stay at 2 as actions are committed.
configuredStore.dispatch({ type: 'INCREMENT' });
liftedStoreState = configuredLiftedStore.getState();
currentComputedState = liftedStoreState.computedStates[liftedStoreState.currentStateIndex];
expect(liftedStoreState.currentStateIndex).toBe(2);
expect(currentComputedState.state).toBe(3);
});
it('should continue to increment currentStateIndex while error blocks commit', () => {
let spy = spyOn(console, 'error');
let storeWithBug = createStore(counterWithBug, instrument(undefined, { maxAge: 3 }));
let liftedStoreWithBug = storeWithBug.liftedStore;
storeWithBug.dispatch({ type: 'DECREMENT' });
storeWithBug.dispatch({ type: 'DECREMENT' });
storeWithBug.dispatch({ type: 'DECREMENT' });
storeWithBug.dispatch({ type: 'DECREMENT' });
let liftedStoreState = liftedStoreWithBug.getState();
let currentComputedState = liftedStoreState.computedStates[liftedStoreState.currentStateIndex];
expect(liftedStoreState.currentStateIndex).toBe(4);
expect(currentComputedState.state).toBe(0);
expect(currentComputedState.error).toExist();
spy.restore();
});
it('should adjust currentStateIndex correctly when multiple actions are committed', () => {
let spy = spyOn(console, 'error');
let storeWithBug = createStore(counterWithBug, instrument(undefined, { maxAge: 3 }));
let liftedStoreWithBug = storeWithBug.liftedStore;
storeWithBug.dispatch({ type: 'DECREMENT' });
storeWithBug.dispatch({ type: 'DECREMENT' });
storeWithBug.dispatch({ type: 'DECREMENT' });
storeWithBug.dispatch({ type: 'DECREMENT' });
// Auto-commit 2 actions by "fixing" reducer bug.
storeWithBug.replaceReducer(counter);
let liftedStoreState = liftedStoreWithBug.getState();
let currentComputedState = liftedStoreState.computedStates[liftedStoreState.currentStateIndex];
expect(liftedStoreState.currentStateIndex).toBe(2);
expect(currentComputedState.state).toBe(-4);
spy.restore();
});
it('should not allow currentStateIndex to drop below 0', () => {
let spy = spyOn(console, 'error');
let storeWithBug = createStore(counterWithBug, instrument(undefined, { maxAge: 3 }));
let liftedStoreWithBug = storeWithBug.liftedStore;
storeWithBug.dispatch({ type: 'DECREMENT' });
storeWithBug.dispatch({ type: 'DECREMENT' });
storeWithBug.dispatch({ type: 'DECREMENT' });
storeWithBug.dispatch({ type: 'DECREMENT' });
liftedStoreWithBug.dispatch(ActionCreators.jumpToState(1));
// Auto-commit 2 actions by "fixing" reducer bug.
storeWithBug.replaceReducer(counter);
let liftedStoreState = liftedStoreWithBug.getState();
let currentComputedState = liftedStoreState.computedStates[liftedStoreState.currentStateIndex];
expect(liftedStoreState.currentStateIndex).toBe(0);
expect(currentComputedState.state).toBe(-2);
spy.restore();
});
it('should throw error when maxAge < 2', () => {
expect(() => {
createStore(counter, instrument(undefined, { maxAge: 1 }));
}).toThrow(/may not be less than 2/);
});
});
describe('Import State', () => {
let monitoredStore;
let monitoredLiftedStore;
let exportedState;
beforeEach(() => {
monitoredStore = createStore(counter, instrument());
monitoredLiftedStore = monitoredStore.liftedStore;
// Set up state to export
monitoredStore.dispatch({ type: 'INCREMENT' });
monitoredStore.dispatch({ type: 'INCREMENT' });
monitoredStore.dispatch({ type: 'INCREMENT' });
exportedState = monitoredLiftedStore.getState();
});
it('should replay all the steps when a state is imported', () => {
let importMonitoredStore = createStore(counter, instrument());
let importMonitoredLiftedStore = importMonitoredStore.liftedStore;
importMonitoredLiftedStore.dispatch(ActionCreators.importState(exportedState));
expect(importMonitoredLiftedStore.getState()).toEqual(exportedState);
});
it('should replace the existing action log with the one imported', () => {
let importMonitoredStore = createStore(counter, instrument());
let importMonitoredLiftedStore = importMonitoredStore.liftedStore;
importMonitoredStore.dispatch({ type: 'DECREMENT' });
importMonitoredStore.dispatch({ type: 'DECREMENT' });
importMonitoredLiftedStore.dispatch(ActionCreators.importState(exportedState));
expect(importMonitoredLiftedStore.getState()).toEqual(exportedState);
});
});
it('throws if reducer is not a function', () => {
expect(() =>
createStore(undefined, instrument())
).toThrow('Expected the reducer to be a function.');
});
it('warns if the reducer is not a function but has a default field that is', () => {
expect(() =>
createStore(({ 'default': () => {} }), instrument())
).toThrow(
'Expected the reducer to be a function. ' +
'Instead got an object with a "default" field. ' +
'Did you pass a module instead of the default export? ' +
'Try passing require(...).default instead.'
);
});
it('throws if there are more than one instrument enhancer included', () => {
expect(() => {
createStore(counter, compose(instrument(), instrument()));
}).toThrow(
'DevTools instrumentation should not be applied more than once. ' +
'Check your store configuration.'
);
});
});