ReactJS/Redux: Testing reducer state with array of objects inside receives undefined array
0
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 '18 at 4:13
iagowp
1,40411325
asked Nov 21 '18 at 20:51
D.WasilewskiD.Wasilewski
226
add a comment |
0
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 '18 at 4:13
iagowp
1,40411325
asked Nov 21 '18 at 20:51
D.WasilewskiD.Wasilewski
226
add a comment |
0
0
0
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 '18 at 4:13
iagowp
1,40411325
asked Nov 21 '18 at 20:51
D.WasilewskiD.Wasilewski
226
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 '18 at 4:13
iagowp
1,40411325
asked Nov 21 '18 at 20:51
D.WasilewskiD.Wasilewski
226
edited Nov 22 '18 at 4:13
iagowp
1,40411325
asked Nov 21 '18 at 20:51
D.WasilewskiD.Wasilewski
226
edited Nov 22 '18 at 4:13
iagowp
1,40411325
edited Nov 22 '18 at 4:13
iagowp
1,40411325
edited Nov 22 '18 at 4:13
iagowp
1,40411325
1,40411325
asked Nov 21 '18 at 20:51
D.WasilewskiD.Wasilewski
226
asked Nov 21 '18 at 20:51
D.WasilewskiD.Wasilewski
226
asked Nov 21 '18 at 20:51
D.WasilewskiD.Wasilewski
226
226
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
0
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 '18 at 3:15
iagowpiagowp
1,40411325
add a comment |
Your Answer
StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
draft saved
draft discarded
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53420294%2freactjs-redux-testing-reducer-state-with-array-of-objects-inside-receives-undef%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
0
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 '18 at 3:15
iagowpiagowp
1,40411325
add a comment |
0
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 '18 at 3:15
iagowpiagowp
1,40411325
add a comment |
0
0
0
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 '18 at 3:15
iagowpiagowp
1,40411325
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 '18 at 3:15
iagowpiagowp
1,40411325
answered Nov 22 '18 at 3:15
iagowpiagowp
1,40411325
answered Nov 22 '18 at 3:15
iagowpiagowp
1,40411325
answered Nov 22 '18 at 3:15
iagowpiagowp
1,40411325
1,40411325
add a comment |
add a comment |
draft saved
draft discarded
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
draft saved
draft discarded
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53420294%2freactjs-redux-testing-reducer-state-with-array-of-objects-inside-receives-undef%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
