![]() ![]() The picture below depicts the whole process. Protractor acts as a wrapper on top of the WebDriverJS-API, which is used to communicate with a Selenium Server, either local (standalone) or remote. A nice tutorial on how to use Jasmine can be The remainer of the article will use the BDD Testing Framework Jasmine. Under the hood it's actually a Node.js application, which supports a wide variety of assertion/test libraries like ProtractorĪlthough the previous section may sound depressing, there is hope for developers in This makes it clear that you must treat your test code like general application logic and give it all the love it deserves. Imagine trying to fill out an input element with the id txtFirstname, just to realize the next day your tests fail because your fellow front-end designer decided to change the name to txtFirstName. The reason is that now, not only one component is tested exclusively, but rather the whole system at once. ![]() Last but not least, there is a much higher test code maintenance cost, compared to unit tests. Thus, modifications which get persisted to databases or local storage will stay that way and may produce side effects for your next test run. Keep in mind that E2E tests, sometimes also referred to as integration tests, test your app's system as a whole. So, compared to unit tests, you will additionally need your web page up and accessible by the browser during test execution. When performing E2E tests you also need to take into consideration that you are actually testing a real web page. Needless to say, variations exist between the different browsers. So working with Promises becomes a major enabler when keeping track of deferred executions and responses.Īnother important aspect already noted is the necessity to translate programmatic actions into browser understandable ones. It doesn't matter whether you request a DOM Element, send some fake keystrokes or trigger a click, each of these actions needs to be automatically translated to understandable instructions and sent to the browser under test. One of the key differences when working with E2E tests is that all of your work is located in the browser, which naturally leads to writing a lot of asynchronous code. It's important to note that one method of testing does not replace the other, so don't take this article as an excuse to skip unit testing. This is different than unit tests, which take care of isolated parts of the application - called units - by verifying them through the removal or mocking of other parts. With E2E testing you are not interacting with the app's code per se, but with the app's interface. The key to success, of course, lies in the amount and quality of tests written. So by assembling a bunch of these - referred to as a test suite - you are able to verify that your web app acts as expected. Essentially, these stories describe a series of actions a user performs to achieve a certain goal. From a requirements-engineering-perspective you'd call those User Stories. What is E2E testing?Įnd-To-End (E2E) testing is all about testing your application against specific scenarios. ![]() This article will show you how to achieve this by combining Aurelia and Protractor. Not only do you want to ensure that your application's internal code operates correctly, but you also want to validate the in-browser behavior. End to End Testing Testing front-end applications has become an important task for today's developers. ![]()
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