There have been multiple instances on my current project where I faced a chain of promises that I am uncertain how to handle.
Below is the relevant code snippet:
return this.axios.get(path, requestOpts)
.then((response) => {console.log('did authorize: ', response); return response})
.then((response) => {
if (response.data.ok) {
window.localStorage.setItem(path, JSON.stringify(response.data));
console.log("Setting localStorage item ", path, response.data);
return response.data.payloadUrl;
} else {
console.error("Non-ok response for ", path, response.data);
const resp: DisplayTokenResponse = response.data;
//TODO: reject promise?
if (resp.status === "AUTHENTICATION_REQUIRED") {
this.axiosService.goToLoginPage(window.location + '');
}
Promise.reject(response.data.message);
}
});
My current test script looks something like this:
describe('.authorize()', () => {
let axiosSpy: jasmine.Spy;
beforeEach((done) => {
spyOn(svc, 'keyPath').and.returnValue(path);
spyOn(svc, 'storedToken').and.returnValue(stored);
let response = {
data: {
ok: true,
message: 'test-response',
payloadUrl: 'http://payload-url.com'
}
}
spyOn(svc.axios, 'get').and.callFake(
(path:string, reqOpts:AxiosRequestConfig) => {
return new Promise(() => {
response
});
}, (e) => {
console.log(`failed`);
});
});
describe('should authorize user', () => {
it('when supplied a STRING', () => {
clientId = clientId_string;
});
it('when supplied a NUMBER', () => {
clientId = clientId_number;
});
afterEach((done) => {
svc.authorize(clientId, locationId, screenId).then((result) => {
console.log(`result ${result}`);
done();
}, (e) => {
console.log(`failed with error ${e}`);
done();
});
});
});
});
I can successfully test promises one level down, but how do I set up my tests to handle complex scenarios like this?