I'm using VueJS 2.0 with SuperAgent in order to create an API client connector. I'm working on test coverage for my API and having trouble when it comes to test SuperAgent methods itself. I need to know how to spy on my private methods within superagent requests:
This is what my SuperAgent request looks so far:
// Importing superagent as request
import request from 'superagent';
if (['get', 'head'].includes(method)) {
return request[method](this.Url(path, opts))
.set(getHeader())
.query(params)
.then(handleSuccess, handleError);
}
return request[method](this.Url(path, opts))
.set(getHeader())
.query(params)
.then(handleSuccess, handleError);
This is inside a conditional because, otherwise, if the HTTP method is not GET or HEAD, the query(params) won't be passed (since it's not needed in this case).
Question 1: How can I spy on superagent in order to know if my promise returned a successful response? Even though I'm not using superagent's promise (since I'm using then() instead of end()), I still need to spy on superagent request;
Question 2: How can check if the query() method has been called by superagent instance (request)?
Test case 1 (using Jasmine):
it('should set the query params if the method IS "get" or "head"');
Test case 2:
it('should call the success callback if the response code is between 200 and 299');
Any thoughts?
Related
I am trying to return an array of data inside a JSON object that is return from a URL, I can see the data that is being returned using console.log.
However when trying to catch the return array in a variable for example:
var arr = list();
console.log(arr.length);
The length being output by this code is "0" despite the fact that the data returned has content (so the length is greater than zero). How can I use the data?
list: function() {
var grades = [];
$.getJSON(
"https://api.mongolab.com/api/1/databases", function(data) {
console.log(data);
grades [0] = data[0].name;
console.log(grades.length);
});
return grades;
},
The issue you are facing is easy to get snagged on if you aren't used to the concept of asynchronous calls! Never fear, you'll get there.
What's happening is that when you call the AJAX, your code continues to process even though the request has not completed. This is because AJAX requests could take a long time (usually a few seconds) and if the browser had to sit and wait, the user would be staring in angsuish at a frozen screen.
So how do you use the result of your AJAX call?
Take a closer look at the getJSON documentation and you will see a few hints. Asynchronous functions like getJSON can be handled in two ways: Promises or Callbacks. They serve a very similar purpose because they are just two different ways to let you specify what to do once your AJAX is finished.
Callbacks let you pass in a function to getJSON. Your function will get called once the AJAX is finished. You're actually already using a callback in the example code you wrote, it's just that your callback is being defined inside of your list() method so it isn't very useful.
Promises let you pass in a function to the Promise returned by getJSON, which will get called once the AJAX is finished.
Since you are doing all this inside of a method, you have to decide which one you're going to support. You can either have your method take in callbacks (and pass them along) or you can have your method return the promise returned by getJSON. I suggest you do both!
Check it out:
var list = function(success) {
// Pass in the callback that was passed into this function. getJSON will call it when the data arrives.
var promise = $.getJSON("https://api.mongolab.com/api/1/databases", success)
// by returning the promise that getJSON provides, we allow the caller to specify the promise handlers
return promise;
}
// Using callbacks
list(function(grades) {
console.log(grades);
});
// Using promises
list()
.success(function(grades) {
console.log(grades);
});
I have already started question about this on AngularJS, factory, do POST then GET method. I have to do POST request get json like {'exp':'2+3','token':'asd'}(SoluableNonagon answerd me very well), then get the token from json and to GET request like /something/:token, before that I'll have to check if token exist in json that i got with POST method. Can anyone tell me how can I do this and how can I call factory from controller that is doing post request?
every $http functions returns a promise, promises can be nested or serialized the return inside the function must be a promise in order to serialize your operations, the next then will be called when the $http.get is finally finished.
$http.post('post1').then(function (resultPost1) {
// do your stuff
return $http.get('get1');
}).then(function (resultGet1) {
// do your stuff
return $http.get('get2').then(function (resultGet2) {
// do your nested stuff
return $http.get('get3');
});
}).then(function (resultGet3) {
// do your stuff
});
More info on $q docs: https://github.com/kriskowal/q
I'm using Ember-Data 1.0.0.Beta-9 and Ember 1.7 to consume a REST API via DreamFactory's REST Platform. (http://www.dreamfactory.com).
I've had to extend the RESTAdapter in order to use DF and I've been able to implement GET and POST requests with no problems. I am now trying to implement model.save() (PUT) requests and am having a serious hiccup.
Calling model.save() sends the PUT request with the correct data to my API endpoint and I get a 200 OK response with a JSON response of { "id": "1" } which is what is supposed to happen. However when I try to access the updated record all of the properties are empty except for ID and the record on the server is not updated. I can take the same JSON string passed in the request, paste it into the DreamFactory Swagger API Docs and it works no problem - response is good and the record is updated on the DB.
I've created a JSBin to show all of the code at http://emberjs.jsbin.com/nagoga/1/edit
Unfortunately I can't have a live example as the servers in question are locked down to only accept requests from our company's public IP range.
DreamFactory provides a live demo of the API in question at
https://dsp-sandman1.cloud.dreamfactory.com/swagger/#!/db/replaceRecordsByIds
OK in the end I discovered that you can customize the DreamFactory response by adding a ?fields=* param to the end of the PUT request. I monkey-patched that into my updateRecord method using the following:
updateRecord: function(store, type, record) {
var data = {};
var serializer = store.serializerFor(type.typeKey);
serializer.serializeIntoHash(data, type, record);
var adapter = this;
return new Ember.RSVP.Promise(function(resolve, reject) {
// hack to make DSP send back the full object
adapter.ajax(adapter.buildURL(type.typeKey) + '?fields=*', "PUT", { data: data }).then(function(json){
// if the request is a success we'll return the same data we passed in
resolve(json);
}, function(reason){
reject(reason.responseJSON);
});
});
}
And poof we haz updates!
DreamFactory has support for tacking several params onto the end of the requests to fully customize the response - at some point I will look to implement this correctly but for the time being I can move forward with my project. Yay!
EmberData is interpreting the response from the server as an empty object with an id of "1" an no other properties in it. You need to return the entire new object back from the server with the changes reflected.
I have the following situation:
I use ngResource to save some data to the mysql database and after the successfull save() I want to log the json response the server sends to me:
Document.save({}, postData, function(response){
console.log(response);
});
This does not result in a simple response, but in something like an object with its own methods. I want some smple output like the response.data after an $http.$get:
{
"docClass":"testets",
"colCount":1,
"columns":null,
"groupid":7,
"id":19,
"lang":"de",
"title":"test",
"version":1409849088,
"workflow":"12234"
}
Greets
Check out this answer
Promise on AngularJS resource save action
So I think in your case you need to do
var document = new Document(postData);
document.$save()
.then(function(res){});
But also from the link I provided
This may very well means that your call to $save would return empty reference. Also then is not available on Resource api before Angular 1.2 as resources are not promise based.
I'm learning d3js. I came across an example for extracting CSV values here. I'm quoting the code:
d3.csv("path/to/file.csv")
.row(function(d) { return {key: d.key, value: +d.value}; })
.get(function(error, rows) { console.log(rows); });
From the description, I get that .row() is the accessor here. But the role of the .get() is not clear to me. When is this function called, and for what purpose ? Thanks.
The .get() is a function of the underlying AJAX request -- it sends the request and establishes the callback. From the documentation:
xhr.get([callback])
Issues this request using the GET method. If a callback is specified, it will be invoked asynchronously when the request is done or errors; the callback is invoked with two arguments: the error, if any, and the response value.