ReactJS/Redux: Testing reducer state with array of objects inside receives undefined array
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I am working for reducer test, when i try to test 1 of my actions types the expected and received values does not match.
eventReducer.test.js
import reducer from './eventReducer';
import { GET_EVENTS } from '../actions/types';
describe('event reducer', () => {
it('should return initial state', () => {
expect(reducer(undefined, {})).toEqual({
eventDetails: ,
loading: false
});
})
it('should store data from db upon mounting component', () =>{
expect(reducer({}, {
type: GET_EVENTS,
eventDetails: [
{
firstName: 'Damian',
lastName: 'Wasilewski'
}
]
})
).toEqual({
eventDetails: [
{
firstName: 'Damian',
lastName: 'Wasilewski'
}
],
loading: false
})
});
})
eventReducer.js
import { GET_EVENTS, ADD_EVENT, DELETE_EVENT, EVENTS_LOADING } from '../actions/types';
const initialState = {
eventDetails: ,
loading: false
}
export default function (state = initialState, action) {
switch(action.type) {
case GET_EVENTS:
return {
...state,
eventDetails: action.payload,
loading: false
};
case DELETE_EVENT:
return {
...state,
eventDetails: state.eventDetails.filter(event => event._id !==
action.payload)
};
case ADD_EVENT:
return {
...state,
eventDetails: [action.payload, ...state.eventDetails]
};
case EVENTS_LOADING:
return {
...state,
loading: true
}
default:
return state;
}
}
My first test is running properly, but when i try to execute second one, it doesn't match received and expected values, problem is with eventDetails array, it keeps outputting that it's value is undefined.
Test output
FAIL src/reducers/eventReducer.test.js
● event reducer › should store data from db upon mounting component
expect(received).toEqual(expected)
Expected value to equal:
{"eventDetails": [{"firstName": "Damian", "lastName": "Wasilewski"}], "loading": false}
Received:
{"eventDetails": undefined, "loading": false}
Difference:
- Expected
+ Received
Object {
- "eventDetails": Array [
- Object {
- "firstName": "Damian",
- "lastName": "Wasilewski",
- },
- ],
+ "eventDetails": undefined,
"loading": false,
}
21 | ]
22 | })
> 23 | ).toEqual({
| ^
24 | eventDetails: [
25 | {
26 | firstName: 'Damian',
at Object.toEqual (src/reducers/eventReducer.test.js:23:5)
What could cause problem of undefined array?
reactjs redux jestjs
edited Nov 22 at 4:13
iagowp
969724
asked Nov 21 at 20:51
D.Wasilewski
206
add a comment |
up vote
0
down vote
favorite
I am working for reducer test, when i try to test 1 of my actions types the expected and received values does not match.
eventReducer.test.js
import reducer from './eventReducer';
import { GET_EVENTS } from '../actions/types';
describe('event reducer', () => {
it('should return initial state', () => {
expect(reducer(undefined, {})).toEqual({
eventDetails: ,
loading: false
});
})
it('should store data from db upon mounting component', () =>{
expect(reducer({}, {
type: GET_EVENTS,
eventDetails: [
{
firstName: 'Damian',
lastName: 'Wasilewski'
}
]
})
).toEqual({
eventDetails: [
{
firstName: 'Damian',
lastName: 'Wasilewski'
}
],
loading: false
})
});
})
eventReducer.js
import { GET_EVENTS, ADD_EVENT, DELETE_EVENT, EVENTS_LOADING } from '../actions/types';
const initialState = {
eventDetails: ,
loading: false
}
export default function (state = initialState, action) {
switch(action.type) {
case GET_EVENTS:
return {
...state,
eventDetails: action.payload,
loading: false
};
case DELETE_EVENT:
return {
...state,
eventDetails: state.eventDetails.filter(event => event._id !==
action.payload)
};
case ADD_EVENT:
return {
...state,
eventDetails: [action.payload, ...state.eventDetails]
};
case EVENTS_LOADING:
return {
...state,
loading: true
}
default:
return state;
}
}
My first test is running properly, but when i try to execute second one, it doesn't match received and expected values, problem is with eventDetails array, it keeps outputting that it's value is undefined.
Test output
FAIL src/reducers/eventReducer.test.js
● event reducer › should store data from db upon mounting component
expect(received).toEqual(expected)
Expected value to equal:
{"eventDetails": [{"firstName": "Damian", "lastName": "Wasilewski"}], "loading": false}
Received:
{"eventDetails": undefined, "loading": false}
Difference:
- Expected
+ Received
Object {
- "eventDetails": Array [
- Object {
- "firstName": "Damian",
- "lastName": "Wasilewski",
- },
- ],
+ "eventDetails": undefined,
"loading": false,
}
21 | ]
22 | })
> 23 | ).toEqual({
| ^
24 | eventDetails: [
25 | {
26 | firstName: 'Damian',
at Object.toEqual (src/reducers/eventReducer.test.js:23:5)
What could cause problem of undefined array?
reactjs redux jestjs
edited Nov 22 at 4:13
iagowp
969724
asked Nov 21 at 20:51
D.Wasilewski
206
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
I am working for reducer test, when i try to test 1 of my actions types the expected and received values does not match.
eventReducer.test.js
import reducer from './eventReducer';
import { GET_EVENTS } from '../actions/types';
describe('event reducer', () => {
it('should return initial state', () => {
expect(reducer(undefined, {})).toEqual({
eventDetails: ,
loading: false
});
})
it('should store data from db upon mounting component', () =>{
expect(reducer({}, {
type: GET_EVENTS,
eventDetails: [
{
firstName: 'Damian',
lastName: 'Wasilewski'
}
]
})
).toEqual({
eventDetails: [
{
firstName: 'Damian',
lastName: 'Wasilewski'
}
],
loading: false
})
});
})
eventReducer.js
import { GET_EVENTS, ADD_EVENT, DELETE_EVENT, EVENTS_LOADING } from '../actions/types';
const initialState = {
eventDetails: ,
loading: false
}
export default function (state = initialState, action) {
switch(action.type) {
case GET_EVENTS:
return {
...state,
eventDetails: action.payload,
loading: false
};
case DELETE_EVENT:
return {
...state,
eventDetails: state.eventDetails.filter(event => event._id !==
action.payload)
};
case ADD_EVENT:
return {
...state,
eventDetails: [action.payload, ...state.eventDetails]
};
case EVENTS_LOADING:
return {
...state,
loading: true
}
default:
return state;
}
}
My first test is running properly, but when i try to execute second one, it doesn't match received and expected values, problem is with eventDetails array, it keeps outputting that it's value is undefined.
Test output
FAIL src/reducers/eventReducer.test.js
● event reducer › should store data from db upon mounting component
expect(received).toEqual(expected)
Expected value to equal:
{"eventDetails": [{"firstName": "Damian", "lastName": "Wasilewski"}], "loading": false}
Received:
{"eventDetails": undefined, "loading": false}
Difference:
- Expected
+ Received
Object {
- "eventDetails": Array [
- Object {
- "firstName": "Damian",
- "lastName": "Wasilewski",
- },
- ],
+ "eventDetails": undefined,
"loading": false,
}
21 | ]
22 | })
> 23 | ).toEqual({
| ^
24 | eventDetails: [
25 | {
26 | firstName: 'Damian',
at Object.toEqual (src/reducers/eventReducer.test.js:23:5)
What could cause problem of undefined array?
reactjs redux jestjs
edited Nov 22 at 4:13
iagowp
969724
asked Nov 21 at 20:51
D.Wasilewski
206
I am working for reducer test, when i try to test 1 of my actions types the expected and received values does not match.
eventReducer.test.js
import reducer from './eventReducer';
import { GET_EVENTS } from '../actions/types';
describe('event reducer', () => {
it('should return initial state', () => {
expect(reducer(undefined, {})).toEqual({
eventDetails: ,
loading: false
});
})
it('should store data from db upon mounting component', () =>{
expect(reducer({}, {
type: GET_EVENTS,
eventDetails: [
{
firstName: 'Damian',
lastName: 'Wasilewski'
}
]
})
).toEqual({
eventDetails: [
{
firstName: 'Damian',
lastName: 'Wasilewski'
}
],
loading: false
})
});
})
eventReducer.js
import { GET_EVENTS, ADD_EVENT, DELETE_EVENT, EVENTS_LOADING } from '../actions/types';
const initialState = {
eventDetails: ,
loading: false
}
export default function (state = initialState, action) {
switch(action.type) {
case GET_EVENTS:
return {
...state,
eventDetails: action.payload,
loading: false
};
case DELETE_EVENT:
return {
...state,
eventDetails: state.eventDetails.filter(event => event._id !==
action.payload)
};
case ADD_EVENT:
return {
...state,
eventDetails: [action.payload, ...state.eventDetails]
};
case EVENTS_LOADING:
return {
...state,
loading: true
}
default:
return state;
}
}
My first test is running properly, but when i try to execute second one, it doesn't match received and expected values, problem is with eventDetails array, it keeps outputting that it's value is undefined.
Test output
FAIL src/reducers/eventReducer.test.js
● event reducer › should store data from db upon mounting component
expect(received).toEqual(expected)
Expected value to equal:
{"eventDetails": [{"firstName": "Damian", "lastName": "Wasilewski"}], "loading": false}
Received:
{"eventDetails": undefined, "loading": false}
Difference:
- Expected
+ Received
Object {
- "eventDetails": Array [
- Object {
- "firstName": "Damian",
- "lastName": "Wasilewski",
- },
- ],
+ "eventDetails": undefined,
"loading": false,
}
21 | ]
22 | })
> 23 | ).toEqual({
| ^
24 | eventDetails: [
25 | {
26 | firstName: 'Damian',
at Object.toEqual (src/reducers/eventReducer.test.js:23:5)
What could cause problem of undefined array?
reactjs redux jestjs
reactjs redux jestjs
edited Nov 22 at 4:13
iagowp
969724
asked Nov 21 at 20:51
D.Wasilewski
206
edited Nov 22 at 4:13
iagowp
969724
asked Nov 21 at 20:51
D.Wasilewski
206
edited Nov 22 at 4:13
iagowp
969724
edited Nov 22 at 4:13
iagowp
969724
edited Nov 22 at 4:13
iagowp
969724
969724
asked Nov 21 at 20:51
D.Wasilewski
206
asked Nov 21 at 20:51
D.Wasilewski
206
asked Nov 21 at 20:51
D.Wasilewski
206
206
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
up vote
0
down vote
accepted
You are setting event.details to action.payload, but on your test you are not sending a payload property.
it('should store data from db upon mounting component', () =>{
expect(reducer({}, {
type: GET_EVENTS,
payload: [
{
firstName: 'Damian',
lastName: 'Wasilewski'
}
]
})
).toEqual({
eventDetails: [
{
firstName: 'Damian',
lastName: 'Wasilewski'
}
],
loading: false
})
});
})
This should solve your problem
answered Nov 22 at 3:15
iagowp
969724
add a comment |
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
0
down vote
accepted
You are setting event.details to action.payload, but on your test you are not sending a payload property.
it('should store data from db upon mounting component', () =>{
expect(reducer({}, {
type: GET_EVENTS,
payload: [
{
firstName: 'Damian',
lastName: 'Wasilewski'
}
]
})
).toEqual({
eventDetails: [
{
firstName: 'Damian',
lastName: 'Wasilewski'
}
],
loading: false
})
});
})
This should solve your problem
answered Nov 22 at 3:15
iagowp
969724
add a comment |
up vote
0
down vote
accepted
You are setting event.details to action.payload, but on your test you are not sending a payload property.
it('should store data from db upon mounting component', () =>{
expect(reducer({}, {
type: GET_EVENTS,
payload: [
{
firstName: 'Damian',
lastName: 'Wasilewski'
}
]
})
).toEqual({
eventDetails: [
{
firstName: 'Damian',
lastName: 'Wasilewski'
}
],
loading: false
})
});
})
This should solve your problem
answered Nov 22 at 3:15
iagowp
969724
add a comment |
up vote
0
down vote
accepted
up vote
0
down vote
accepted
You are setting event.details to action.payload, but on your test you are not sending a payload property.
it('should store data from db upon mounting component', () =>{
expect(reducer({}, {
type: GET_EVENTS,
payload: [
{
firstName: 'Damian',
lastName: 'Wasilewski'
}
]
})
).toEqual({
eventDetails: [
{
firstName: 'Damian',
lastName: 'Wasilewski'
}
],
loading: false
})
});
})
This should solve your problem
answered Nov 22 at 3:15
iagowp
969724
You are setting event.details to action.payload, but on your test you are not sending a payload property.
it('should store data from db upon mounting component', () =>{
expect(reducer({}, {
type: GET_EVENTS,
payload: [
{
firstName: 'Damian',
lastName: 'Wasilewski'
}
]
})
).toEqual({
eventDetails: [
{
firstName: 'Damian',
lastName: 'Wasilewski'
}
],
loading: false
})
});
})
This should solve your problem
answered Nov 22 at 3:15
iagowp
969724
answered Nov 22 at 3:15
iagowp
969724
answered Nov 22 at 3:15
iagowp
969724
answered Nov 22 at 3:15
iagowp
969724
969724
add a comment |
add a comment |
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