$q use in angularjs
function MyService($q) {
return {
getSomething() {
return $q((resolve, reject) => {
if (/* some async task is all good */) {
resolve('Success!');
} else {
reject('Oops... something went wrong');
}
});
}
};
}
angular
.module('app')
.service('MyService', MyService);$q use in angularjs
it('should simulate promise', inject(function($q, $rootScope) {
var deferred = $q.defer();
var promise = deferred.promise;
var resolvedValue;
promise.then(function(value) { resolvedValue = value; });
expect(resolvedValue).toBeUndefined();
// Simulate resolving of promise
deferred.resolve(123);
// Note that the 'then' function does not get called synchronously.
// This is because we want the promise API to always be async, whether or not
// it got called synchronously or asynchronously.
expect(resolvedValue).toBeUndefined();
// Propagate promise resolution to 'then' functions using $apply().
$rootScope.$apply();
expect(resolvedValue).toEqual(123);
}));$q use in angularjs
const handleThirdPartyCallback = someArgument => {
let promise = new Promise((resolve, reject) => {
// assuming some third-party API, that is *not* a Promise Object
// but fires a callback once finished
myCallbackLib(someArgument, response => {
// we can resolve it with the response
resolve(response);
}, reason => {
// we can reject it with the reason
reject(reason);
});
});
return promise;
};
handleThirdPartyCallback({ user: 101 }).then(data => {
console.log(data);
});Copyright © 2021 Codeinu
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