jest enzyme | testing Promise in component function passes but throws an error
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I have a container where I have a function which makes an API request using fetch:
updateBooks = books => this.setState({ books });
getBooks = keyword => fetch(`${googleBooksSearchAPI}${keyword}`)
.then(response => response.json())
.then(myJson => this.updateBooks(myJson.items))
.catch(error => console.log('error', error));
I'm trying to write tests for it using fetch-mock:
it('getBooks works', () => {
const wrapper = shallow(<BookContainer />);
const mockData = { items: bookListObj };
fetchMock.get(googleBooksSearchAPI, mockData);
wrapper.instance().getBooks('dun');
expect(wrapper.state().books).toEqual(bookListObj);
fetchMock.restore();
});
All tests show as passed, but still, I can see this error:
console.log app/components/BookContainer.js:20
error FetchError {
name: 'FetchError',
message: 'invalid json response body at undefined reason: Unexpected end of JSON input',
type: 'invalid-json' }
if I remove catch from fetch it shows the message like this:
(node:5094) UnhandledPromiseRejectionWarning: FetchError: invalid json response body at undefined reason: Unexpected end of JSON input
(node:5094) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 2)
(node:5094) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
How to remove it?
reactjs promise jestjs
asked Nov 11 at 17:58
Kania
1,04611828
add a comment |
up vote
0
down vote
favorite
I have a container where I have a function which makes an API request using fetch:
updateBooks = books => this.setState({ books });
getBooks = keyword => fetch(`${googleBooksSearchAPI}${keyword}`)
.then(response => response.json())
.then(myJson => this.updateBooks(myJson.items))
.catch(error => console.log('error', error));
I'm trying to write tests for it using fetch-mock:
it('getBooks works', () => {
const wrapper = shallow(<BookContainer />);
const mockData = { items: bookListObj };
fetchMock.get(googleBooksSearchAPI, mockData);
wrapper.instance().getBooks('dun');
expect(wrapper.state().books).toEqual(bookListObj);
fetchMock.restore();
});
All tests show as passed, but still, I can see this error:
console.log app/components/BookContainer.js:20
error FetchError {
name: 'FetchError',
message: 'invalid json response body at undefined reason: Unexpected end of JSON input',
type: 'invalid-json' }
if I remove catch from fetch it shows the message like this:
(node:5094) UnhandledPromiseRejectionWarning: FetchError: invalid json response body at undefined reason: Unexpected end of JSON input
(node:5094) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 2)
(node:5094) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
How to remove it?
reactjs promise jestjs
asked Nov 11 at 17:58
Kania
1,04611828
What is fetchMock? Where is getBooks called? Please, provide stackoverflow.com/help/mcve
– estus
Nov 11 at 18:20
fetchMockis, as written, -fetch-mock.getBooksis called incomponentDidUpdate, I don't think it is important from this test point of view. I'm testing just this function
– Kania
Nov 12 at 2:12
1
MCVE is required by SO rules to avoid long negotiations about what should be posted and what shouldn't. I suppose the problem here is thatgetBooksis called beforefetchis mocked or it's not mocked for some other reason, but I cannot confirm this without seeing the component.
– estus
Nov 12 at 6:52
Perhaps, you need to apply keyword to fetch mock fetchMock.get(${googleBooksSearchAPI}dyn, mockData)
– Alex
Nov 13 at 0:07
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
I have a container where I have a function which makes an API request using fetch:
updateBooks = books => this.setState({ books });
getBooks = keyword => fetch(`${googleBooksSearchAPI}${keyword}`)
.then(response => response.json())
.then(myJson => this.updateBooks(myJson.items))
.catch(error => console.log('error', error));
I'm trying to write tests for it using fetch-mock:
it('getBooks works', () => {
const wrapper = shallow(<BookContainer />);
const mockData = { items: bookListObj };
fetchMock.get(googleBooksSearchAPI, mockData);
wrapper.instance().getBooks('dun');
expect(wrapper.state().books).toEqual(bookListObj);
fetchMock.restore();
});
All tests show as passed, but still, I can see this error:
console.log app/components/BookContainer.js:20
error FetchError {
name: 'FetchError',
message: 'invalid json response body at undefined reason: Unexpected end of JSON input',
type: 'invalid-json' }
if I remove catch from fetch it shows the message like this:
(node:5094) UnhandledPromiseRejectionWarning: FetchError: invalid json response body at undefined reason: Unexpected end of JSON input
(node:5094) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 2)
(node:5094) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
How to remove it?
reactjs promise jestjs
asked Nov 11 at 17:58
Kania
1,04611828
I have a container where I have a function which makes an API request using fetch:
updateBooks = books => this.setState({ books });
getBooks = keyword => fetch(`${googleBooksSearchAPI}${keyword}`)
.then(response => response.json())
.then(myJson => this.updateBooks(myJson.items))
.catch(error => console.log('error', error));
I'm trying to write tests for it using fetch-mock:
it('getBooks works', () => {
const wrapper = shallow(<BookContainer />);
const mockData = { items: bookListObj };
fetchMock.get(googleBooksSearchAPI, mockData);
wrapper.instance().getBooks('dun');
expect(wrapper.state().books).toEqual(bookListObj);
fetchMock.restore();
});
All tests show as passed, but still, I can see this error:
console.log app/components/BookContainer.js:20
error FetchError {
name: 'FetchError',
message: 'invalid json response body at undefined reason: Unexpected end of JSON input',
type: 'invalid-json' }
if I remove catch from fetch it shows the message like this:
(node:5094) UnhandledPromiseRejectionWarning: FetchError: invalid json response body at undefined reason: Unexpected end of JSON input
(node:5094) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 2)
(node:5094) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
How to remove it?
reactjs promise jestjs
reactjs promise jestjs
asked Nov 11 at 17:58
Kania
1,04611828
asked Nov 11 at 17:58
Kania
1,04611828
asked Nov 11 at 17:58
Kania
1,04611828
asked Nov 11 at 17:58
Kania
1,04611828
asked Nov 11 at 17:58
Kania
1,04611828
1,04611828
What is fetchMock? Where is getBooks called? Please, provide stackoverflow.com/help/mcve
– estus
Nov 11 at 18:20
fetchMockis, as written, -fetch-mock.getBooksis called incomponentDidUpdate, I don't think it is important from this test point of view. I'm testing just this function
– Kania
Nov 12 at 2:12
1
MCVE is required by SO rules to avoid long negotiations about what should be posted and what shouldn't. I suppose the problem here is thatgetBooksis called beforefetchis mocked or it's not mocked for some other reason, but I cannot confirm this without seeing the component.
– estus
Nov 12 at 6:52
Perhaps, you need to apply keyword to fetch mock fetchMock.get(${googleBooksSearchAPI}dyn, mockData)
– Alex
Nov 13 at 0:07
add a comment |
What is fetchMock? Where is getBooks called? Please, provide stackoverflow.com/help/mcve
– estus
Nov 11 at 18:20
fetchMockis, as written, -fetch-mock.getBooksis called incomponentDidUpdate, I don't think it is important from this test point of view. I'm testing just this function
– Kania
Nov 12 at 2:12
1
MCVE is required by SO rules to avoid long negotiations about what should be posted and what shouldn't. I suppose the problem here is thatgetBooksis called beforefetchis mocked or it's not mocked for some other reason, but I cannot confirm this without seeing the component.
– estus
Nov 12 at 6:52
Perhaps, you need to apply keyword to fetch mock fetchMock.get(${googleBooksSearchAPI}dyn, mockData)
– Alex
Nov 13 at 0:07
What is fetchMock? Where is getBooks called? Please, provide stackoverflow.com/help/mcve
– estus
Nov 11 at 18:20
What is fetchMock? Where is getBooks called? Please, provide stackoverflow.com/help/mcve
– estus
Nov 11 at 18:20
fetchMock is, as written, - fetch-mock. getBooks is called in componentDidUpdate, I don't think it is important from this test point of view. I'm testing just this function– Kania
Nov 12 at 2:12
fetchMock is, as written, - fetch-mock. getBooks is called in componentDidUpdate, I don't think it is important from this test point of view. I'm testing just this function– Kania
Nov 12 at 2:12
1
1
MCVE is required by SO rules to avoid long negotiations about what should be posted and what shouldn't. I suppose the problem here is that
getBooks is called before fetch is mocked or it's not mocked for some other reason, but I cannot confirm this without seeing the component.– estus
Nov 12 at 6:52
MCVE is required by SO rules to avoid long negotiations about what should be posted and what shouldn't. I suppose the problem here is that
getBooks is called before fetch is mocked or it's not mocked for some other reason, but I cannot confirm this without seeing the component.– estus
Nov 12 at 6:52
Perhaps, you need to apply keyword to fetch mock fetchMock.get(
${googleBooksSearchAPI}dyn, mockData)– Alex
Nov 13 at 0:07
Perhaps, you need to apply keyword to fetch mock fetchMock.get(
${googleBooksSearchAPI}dyn, mockData)– Alex
Nov 13 at 0:07
add a comment |
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What is fetchMock? Where is getBooks called? Please, provide stackoverflow.com/help/mcve
– estus
Nov 11 at 18:20
fetchMockis, as written, -fetch-mock.getBooksis called incomponentDidUpdate, I don't think it is important from this test point of view. I'm testing just this function– Kania
Nov 12 at 2:12
1
MCVE is required by SO rules to avoid long negotiations about what should be posted and what shouldn't. I suppose the problem here is that
getBooksis called beforefetchis mocked or it's not mocked for some other reason, but I cannot confirm this without seeing the component.– estus
Nov 12 at 6:52
Perhaps, you need to apply keyword to fetch mock fetchMock.get(
${googleBooksSearchAPI}dyn, mockData)– Alex
Nov 13 at 0:07