We can define the following test:
spyOn(x, 'funk').andReturn(true);
If we then wanted to define:
spyOn(x, 'funk').andReturn(false);
We would get an error saying that funk had already been spied on.
How could we effectively unspy so that could respy with the new return value?
You can re-train spies:
//--- CODE --------------------------
x = {
funk: function() {
return 1;
}
}
// --- SPECS -------------------------
describe('test x', function () {
it("trains spies", function () {
spyOn(x, 'funk');
x.funk.andReturn('a');
expect(x.funk()).toBe('a');
x.funk.andCallThrough();
expect(x.funk()).toBe(1);
});
});
See fiddle here - http://jsfiddle.net/eitanp461/88kvnzx3/
Yes it's possible to unspy.
As the spy is just a function that replaces whatever function you want to spy on, you can replace it again with another function.
Two sensible ways of doing this are as follows - first, just add an empty function, Jasmine will have all it needs for a new spy:
x.funk = function() {}
Or, if the functionality of original function is important, just store it in a value like so:
var tempFunk = x.funk
/* do stuff */
x.funk = tempFunk
Related
I'm working on some Jasmine end-to-end testing, using Protractor test runner. The application I am testing is a simple webpage. I already have a test scenario that works fine.
Now I'd like to improve my code so that I can use the same script to run the testing scenario twice.
The first time: the test would be performed on the English version of the page
The second time: on a translated version of the same page.
Here is my code:
var RandomSentenceInThePage = ["Sentence in English", "Phrase en Francais"];
var i;
var signInButton;
var TranslationButton;
var RandomSentenceInThePageBis;
i = 0;
//Runs the testing scenario twice
while (i < 2) {
describe('TC1 - The registration Page', function() {
//the translation is done on the second iteration
if (i != 0) {
beforeEach(function() {
browser.ignoreSynchronization = true;
browser.get('https://Mywebsite.url.us/');
//we get the translation button then click on it
TranslationButton = element(by.css('.TranslationButtonClass'));
TranslationButton.click();
});
}
//On the first iteration, we run the test on the not translated page…
Else {
beforeEach(function() {
browser.ignoreSynchronization = true; //Necessary for the browser.get() method to work inside the it statements.
browser.get('https://Mywebsite.url.us/');
});
}
it('should display the log in page', function() {
//Accessing the browser is done in the before each section
signInButton = element(by.css('.SignInButtonClass'));
signInButton.click();
RandomSentenceInThePageBis = element(by.css('.mt-4.text-center.signin-header')).getText();
/*******************[HERE IS WHERE THE PROBLEM IS]*******************/
expect(RandomSentenceInThePageBis.getText()).toEqual(RandomSentenceInThePage[i]);
});
/*******************************************************************/
});
}
I have highlighted the problematic section. The code keeps running even before the comparison between RandomSentenceInThePage[i] and RandomSentenceInThePageBis are compared. And when they are finally compared, the loop is already done.
According to what I have seen on the other related topics, because of the use of expect statements and getText() methods, I am dealing with promises and I have to wait for them to be resolved. After trying for the whole day, I think I could use a hint on how to deal with this promise resolution. Let me know if you need more information.
Change while loop to for loop and declare the variable: i by let, rather than var
let can declare variable at code block scope like for, if block etc. But var can't.
Because protractor api execute async, thus when the expect()... execute for the second time. the value of i has become 2, not 1
for(let i=0;i<2;i++) {
describe('TC1 - The registration Page', function() {
....
})
}
I'am using chakram + mocha.
How can I use shared variables for all test?
For example, I would like to use variable API_PATH="http://example.com/v1/" in tests. And this variable could be changed during running test. So, my test looks like this.
var response = chakram.get(API_PATH + "products");
expect(response).to.have.status(200);
As example, protractor has conf.js with parameter baseUrl. Running test looks like protractor conf.js --baseUrl http://example.com/
what have you tried so far? Have you tried using beforeEach to reinitialize the object that you are using? You could just make the the shared variables declared outside of your tests.
EDIT: Adding details from what Jerry said:
If you want all variable to be reused within the same test, you must make them global variables. See example below
///include dependencies
var assert = require('assert'),
chai = require('chai'),
expect = chai.expect,
chakram = require('chakram');
//INIT GLOBAL VARAIBLES FOR within the same test
var testObj,
dummyData = {
user: 'John Kim',
lastSeenOnline: 'Wed August 11 12:05 2017'
};
describe ('#User', function () {
beforeEach(function () {
//init what the object contains
testObj = new DataStore(data, ContainerStore);
});
it ('#Should return the name of the user', function () {
assert.equal(testObj.get('user'), dummyData.user);
});
it("should offer simple HTTP request capabilities", function () {
return chakram.get("http://httpbin.org/get");
});
});
Note: I work with react but this is an example. We assume that the ContainerStore contains a method that has a method for get() which just gets the value of our JSON object. You can use testObj many time in different describe blocks since it is declared outside of your tests. But you should remember to always reinitialize your tesObj in a beforeEach(); otherwise, you risk populating your individual tests. There are cases were you do not have to initialize the beforeEach() and it is optional.
For Example in config.js
module.exports = {
"baseUrl": "http://example.com/",
"googleUrl": "http://www.google.com.tr/"
};
And use in javascript code:
let config = require('/config');
describle("test describle", () => {
it("test", () => {
chakram.get(config.baseUrl + "products"); //for example use
})
})
Let's say I have this function I want to test:
var test = function () {
console.log('words!');
};
I'd write something like this
define('test()', function () {
it('prints "words!" to the screen', function() {
test();
expect(<browser logs>).toContain('words!'); // TODO
}
}
But I don't know how to view the console logs or if this is even possible. Preferably, I'd do this in any browser, or at least PhantomJS.
You may create the spy on console.log function. The code may look like ...
describe("log reporting", function () {
beforeEach(function(){
spyOn(window.console, 'log');
});
it('should print log message to console', function(){
test();
expect(window.console.log).toHaveBeenCalled();
})
});
With this example you would know your console.log function was called. This is exactly what you need to know. You don't want to compare logged message with expected value, simply because you would unit test not your code, but window.console.log function itself, which you didn't write ;) You may call ".and.callFake(function(){do something});". In this case you would do something instead of actual console.log call, for example check your value.
I have some tests that fail in PhantomJS but not other browsers.
I'd like these tests to be ignored when run with PhantomJS in my watch task (so new browser windows don't take focus and perf is a bit faster), but in my standard test task and my CI pipeline, I want all the tests to run in Chrome, Firefox, etc...
I've considered a file-naming convention like foo.spec.dont-use-phantom.js and excluding those in my Karma config, but this means that I will have to separate out the individual tests that are failing into their own files, separating them from their logical describe blocks and having more files with weird naming conventions would generally suck.
In short:
Is there a way I can extend Jasmine and/or Karma and somehow annotate individual tests to only run with certain configurations?
Jasmine supports a pending() function.
If you call pending() anywhere in the spec body, no matter the expectations, the spec will be marked pending.
You can call pending() directly in test, or in some other function called from test.
function skipIfCondition() {
pending();
}
function someSkipCheck() {
return true;
}
describe("test", function() {
it("call pending directly by condition", function() {
if (someSkipCheck()) {
pending();
}
expect(1).toBe(2);
});
it("call conditionally skip function", function() {
skipIfCondition();
expect(1).toBe(3);
});
it("is executed", function() {
expect(1).toBe(1);
});
});
working example here: http://plnkr.co/edit/JZtAKALK9wi5PdIkbw8r?p=preview
I think it is purest solution. In test results you can see count of finished and skipped tests.
The most simple solution that I see is to override global functions describe and it to make them accept third optional argument, which has to be a boolean or a function returning a boolean - to tell whether or not current suite/spec should be executed. When overriding we should check if this third optional arguments resolves to true, and if it does, then we call xdescribe/xit (or ddescribe/iit depending on Jasmine version), which are Jasmine's methods to skip suite/spec, istead of original describe/it. This block has to be executed before the tests, but after Jasmine is included to the page. In Karma just move this code to a file and include it before test files in karma.conf.js. Here is the code:
(function (global) {
// save references to original methods
var _super = {
describe: global.describe,
it: global.it
};
// override, take third optional "disable"
global.describe = function (name, fn, disable) {
var disabled = disable;
if (typeof disable === 'function') {
disabled = disable();
}
// if should be disabled - call "xdescribe" (or "ddescribe")
if (disable) {
return global.xdescribe.apply(this, arguments);
}
// otherwise call original "describe"
return _super.describe.apply(this, arguments);
};
// override, take third optional "disable"
global.it = function (name, fn, disable) {
var disabled = disable;
if (typeof disable === 'function') {
disabled = disable();
}
// if should be disabled - call "xit" (or "iit")
if (disable) {
return global.xit.apply(this, arguments);
}
// otherwise call original "it"
return _super.it.apply(this, arguments);
};
}(window));
And usage example:
describe('foo', function () {
it('should foo 1 ', function () {
expect(true).toBe(true);
});
it('should foo 2', function () {
expect(true).toBe(true);
});
}, true); // disable suite
describe('bar', function () {
it('should bar 1 ', function () {
expect(true).toBe(true);
});
it('should bar 2', function () {
expect(true).toBe(true);
}, function () {
return true; // disable spec
});
});
See a working example here
I've also stumbled upon this issue where the idea was to add a chain method .when() for describe and it, which will do pretty much the same I've described above. It may look nicer but is a bit harder to implement.
describe('foo', function () {
it('bar', function () {
// ...
}).when(anything);
}).when(something);
If you are really interested in this second approach, I'll be happy to play with it a little bit more and try to implement chain .when().
Update:
Jasmine uses third argument as a timeout option (see docs), so my code sample is replacing this feature, which is not ok. I like #milanlempera and #MarcoCI answers better, mine seems kinda hacky and not intuitive. I'll try to update my solution anyways soon not to break compatibilty with Jasmine default features.
I can share my experience with this.
In our environment we have several tests running with different browsers and different technologies.
In order to run always the same suites on all the platforms and browsers we have a helper file loaded in karma (helper.js) with some feature detection functions loaded globally.
I.e.
function isFullScreenSupported(){
// run some feature detection code here
}
You can use also Modernizr for this as well.
In our tests then we wrap things in if/else blocks like the following:
it('should work with fullscreen', function(){
if(isFullScreenSupported()){
// run the test
}
// don't do anything otherwise
});
or for an async test
it('should work with fullscreen', function(done){
if(isFullScreenSupported()){
// run the test
...
done();
} else {
done();
}
});
While it's a bit verbose it will save you time for the kind of scenario you're facing.
In some cases you can use user agent sniffing to detect a particular browser type or version - I know it is bad practice but sometimes there's effectively no other way.
Try this. I am using this solution in my projects.
it('should do something', function () {
if (!/PhantomJS/.test(window.navigator.userAgent)) {
expect(true).to.be.true;
}
});
This will not run this particular test in PhantomJS, but will run it in other browsers.
Just rename the tests that you want to disable from it(...) to xit(...)
function xit: A temporarily disabled it. The spec will report as
pending and will not be executed.
I'm very new to unit test and want to use Jasmine for unit testing mouse events, something like
$('.el').mousedown(function() {
$(this)[0].dragging = true;
});
$('.el').mousemove(function() {
if ( $(this)[0].dragging ) {
$(this).addClass("dragging");
}
});
$('.el').mouseup(function() {
$(this)[0].dragging = false;
$(this).removeClass("dragging");
});
Here's an example of how it might work.
My question is how to do the unit test for each function here.
The functions ought to be named functions in $scope. Then you could simply call the function in your test and verify that the element had the class removed/added as expected.