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import type {
Action,
Middleware,
ThunkAction,
UnknownAction,
} from '@reduxjs/toolkit'
import { configureStore } from '@reduxjs/toolkit'
import { thunk } from 'redux-thunk'
import { vi } from 'vitest'
import { buildGetDefaultMiddleware } from '@internal/getDefaultMiddleware'
const getDefaultMiddleware = buildGetDefaultMiddleware()
describe('getDefaultMiddleware', () => {
afterEach(() => {
vi.unstubAllEnvs()
})
describe('Production behavior', () => {
beforeEach(() => {
vi.resetModules()
})
it('returns an array with only redux-thunk in production', async () => {
vi.stubEnv('NODE_ENV', 'production')
const { thunk } = await import('redux-thunk')
const { buildGetDefaultMiddleware } = await import(
'@internal/getDefaultMiddleware'
)
const middleware = buildGetDefaultMiddleware()()
expect(middleware).toContain(thunk)
expect(middleware.length).toBe(1)
})
})
it('returns an array with additional middleware in development', () => {
const middleware = getDefaultMiddleware()
expect(middleware).toContain(thunk)
expect(middleware.length).toBeGreaterThan(1)
})
const defaultMiddleware = getDefaultMiddleware()
it('removes the thunk middleware if disabled', () => {
const middleware = getDefaultMiddleware({ thunk: false })
// @ts-ignore
expect(middleware.includes(thunk)).toBe(false)
expect(middleware.length).toBe(defaultMiddleware.length - 1)
})
it('removes the immutable middleware if disabled', () => {
const middleware = getDefaultMiddleware({ immutableCheck: false })
expect(middleware.length).toBe(defaultMiddleware.length - 1)
})
it('removes the serializable middleware if disabled', () => {
const middleware = getDefaultMiddleware({ serializableCheck: false })
expect(middleware.length).toBe(defaultMiddleware.length - 1)
})
it('removes the action creator middleware if disabled', () => {
const middleware = getDefaultMiddleware({ actionCreatorCheck: false })
expect(middleware.length).toBe(defaultMiddleware.length - 1)
})
it('allows passing options to thunk', () => {
const extraArgument = 42 as const
const m2 = getDefaultMiddleware({
thunk: false,
})
const dummyMiddleware: Middleware<
{
(action: Action<'actionListenerMiddleware/add'>): () => void
},
{ counter: number }
> = (storeApi) => (next) => (action) => {
return next(action)
}
const dummyMiddleware2: Middleware<{}, { counter: number }> =
(storeApi) => (next) => (action) => {}
const testThunk: ThunkAction<
void,
{ counter: number },
number,
UnknownAction
> = (dispatch, getState, extraArg) => {
expect(extraArg).toBe(extraArgument)
}
const reducer = () => ({ counter: 123 })
const store = configureStore({
reducer,
middleware: (gDM) => {
const middleware = gDM({
thunk: { extraArgument },
immutableCheck: false,
serializableCheck: false,
actionCreatorCheck: false,
})
const m3 = middleware.concat(dummyMiddleware, dummyMiddleware2)
return m3
},
})
store.dispatch(testThunk)
})
it('allows passing options to immutableCheck', () => {
let immutableCheckWasCalled = false
const middleware = () =>
getDefaultMiddleware({
thunk: false,
immutableCheck: {
isImmutable: () => {
immutableCheckWasCalled = true
return true
},
},
serializableCheck: false,
actionCreatorCheck: false,
})
const reducer = () => ({})
const store = configureStore({
reducer,
middleware,
})
expect(immutableCheckWasCalled).toBe(true)
})
it('allows passing options to serializableCheck', () => {
let serializableCheckWasCalled = false
const middleware = () =>
getDefaultMiddleware({
thunk: false,
immutableCheck: false,
serializableCheck: {
isSerializable: () => {
serializableCheckWasCalled = true
return true
},
},
actionCreatorCheck: false,
})
const reducer = () => ({})
const store = configureStore({
reducer,
middleware,
})
store.dispatch({ type: 'TEST_ACTION' })
expect(serializableCheckWasCalled).toBe(true)
})
})
it('allows passing options to actionCreatorCheck', () => {
let actionCreatorCheckWasCalled = false
const middleware = () =>
getDefaultMiddleware({
thunk: false,
immutableCheck: false,
serializableCheck: false,
actionCreatorCheck: {
isActionCreator: (action: unknown): action is Function => {
actionCreatorCheckWasCalled = true
return false
},
},
})
const reducer = () => ({})
const store = configureStore({
reducer,
middleware,
})
store.dispatch({ type: 'TEST_ACTION' })
expect(actionCreatorCheckWasCalled).toBe(true)
})
describe('Tuple functionality', () => {
const middleware1: Middleware = () => (next) => (action) => next(action)
const middleware2: Middleware = () => (next) => (action) => next(action)
const defaultMiddleware = getDefaultMiddleware()
const originalDefaultMiddleware = [...defaultMiddleware]
test('allows to prepend a single value', () => {
const prepended = defaultMiddleware.prepend(middleware1)
// value is prepended
expect(prepended).toEqual([middleware1, ...defaultMiddleware])
// returned value is of correct type
expect(prepended).toBeInstanceOf(Tuple)
// prepended is a new array
expect(prepended).not.toEqual(defaultMiddleware)
// defaultMiddleware is not modified
expect(defaultMiddleware).toEqual(originalDefaultMiddleware)
})
test('allows to prepend multiple values (array as first argument)', () => {
const prepended = defaultMiddleware.prepend([middleware1, middleware2])
// value is prepended
expect(prepended).toEqual([middleware1, middleware2, ...defaultMiddleware])
// returned value is of correct type
expect(prepended).toBeInstanceOf(Tuple)
// prepended is a new array
expect(prepended).not.toEqual(defaultMiddleware)
// defaultMiddleware is not modified
expect(defaultMiddleware).toEqual(originalDefaultMiddleware)
})
test('allows to prepend multiple values (rest)', () => {
const prepended = defaultMiddleware.prepend(middleware1, middleware2)
// value is prepended
expect(prepended).toEqual([middleware1, middleware2, ...defaultMiddleware])
// returned value is of correct type
expect(prepended).toBeInstanceOf(Tuple)
// prepended is a new array
expect(prepended).not.toEqual(defaultMiddleware)
// defaultMiddleware is not modified
expect(defaultMiddleware).toEqual(originalDefaultMiddleware)
})
test('allows to concat a single value', () => {
const concatenated = defaultMiddleware.concat(middleware1)
// value is concatenated
expect(concatenated).toEqual([...defaultMiddleware, middleware1])
// returned value is of correct type
expect(concatenated).toBeInstanceOf(Tuple)
// concatenated is a new array
expect(concatenated).not.toEqual(defaultMiddleware)
// defaultMiddleware is not modified
expect(defaultMiddleware).toEqual(originalDefaultMiddleware)
})
test('allows to concat multiple values (array as first argument)', () => {
const concatenated = defaultMiddleware.concat([middleware1, middleware2])
// value is concatenated
expect(concatenated).toEqual([
...defaultMiddleware,
middleware1,
middleware2,
])
// returned value is of correct type
expect(concatenated).toBeInstanceOf(Tuple)
// concatenated is a new array
expect(concatenated).not.toEqual(defaultMiddleware)
// defaultMiddleware is not modified
expect(defaultMiddleware).toEqual(originalDefaultMiddleware)
})
test('allows to concat multiple values (rest)', () => {
const concatenated = defaultMiddleware.concat(middleware1, middleware2)
// value is concatenated
expect(concatenated).toEqual([
...defaultMiddleware,
middleware1,
middleware2,
])
// returned value is of correct type
expect(concatenated).toBeInstanceOf(Tuple)
// concatenated is a new array
expect(concatenated).not.toEqual(defaultMiddleware)
// defaultMiddleware is not modified
expect(defaultMiddleware).toEqual(originalDefaultMiddleware)
})
test('allows to concat and then prepend', () => {
const concatenated = defaultMiddleware
.concat(middleware1)
.prepend(middleware2)
expect(concatenated).toEqual([
middleware2,
...defaultMiddleware,
middleware1,
])
})
test('allows to prepend and then concat', () => {
const concatenated = defaultMiddleware
.prepend(middleware2)
.concat(middleware1)
expect(concatenated).toEqual([
middleware2,
...defaultMiddleware,
middleware1,
])
})
})
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