I have the following function and i want to test it using mocha and chai, expect.
Here "fetch" and "dispatch" is a function. "fetch" is used to do ajax calls to the server
function fetchMetadata() {
return (dispatch) => {
fetch('/json/metadata').then(
(result) => {
if (result.status === 200) {
return result.json();
}
throw "request failed";
}
).then(
(jsonResult) => {
dispatch(jsonResult);
}
);
}
}I am trying to test is as following but i cant get the test to fail as the error is swallowed by the promise!
"fetchMock" is a function which mocks "fetch" function so that we dont actually make a call to server to get the data back.
describe('Should work', ()=>{
before(()=>{
fetchMock.mock('^/json/metadata', {body1:"testing"})
});
it.only('should fetch metadata when fetchMetadata is called ', function(){
let returnedFetchMetadataFn = fetchMetadata();
let mockDispatch = (argument)=>{
expect(argument).toBe('SET_METADATA1');
};
returnedFetchMetadataFn(mockDispatch);
});
});What am i doing wrong or what am i missing??