Figure 1 shows the screens that can be found in our sample photo application. Dec 27, 2014 gwt is only useful for java developers, if you are coming from a different background i dont think gwt will be helpful for you. Ifwhen that code is reevaluated, our plan is to rewrite the unit test using gwtmockito. Testing presenter is where main functionality lives so, we mostly test the presenter using regular junit tests, mocking out the rest of the components for tests that absolutely need browser environment to be tested properly, we use gwttestcase class the rest is tested using some framework like selenium there is a lot to be. What is model view presenter mvp in gwt application. What is the best way to test gwt code stack overflow. Testing gwt apps with selenium or webdriver posted on october 27, 2011 by carey good functional testing is one of the most difficult tasks for web application developers and their teams. Could you give me some details about testing with selenium. Separating the view and the presenter allows for more modular, more easily tested code with shorter test times. How can i unit test the presenter using mock objects. I wrote an article for better software about testfirst gwt, which you can. The reason is that smart gwt classes contain native javascript code that binds to smartclient. Hopefully, that makes it easier for focus on the testing, and not on the sample application. You might be a java developer who would like to be able to apply the software engineering principles of objectoriented programming and leverage the tools in your java ide when writing applications for the web.
Examples of integration test with spring and in memory database. Youll be able to create units test that you can run in both development mode. Last week, i did some research on gwt, how to test it and code coverage. Swapping divs technique for navigation with gwtpresenter. Those techniques work well for swapping out views in one portion of the page, and could be applied to the whole page, as well. I have previously written about navigation in gwtpresenter using the deckpresenter or widgetcontainerpresenter approaches. This section simulates a real online test along with a given timer which challenges you to complete the test within a given timeframe. After i asked the question, i found that i can use mockito for presenter unit test. The problem is, for example, i cannot test a controller that wants to get the selected record of a listgrid and access to its attributes. The gwt mavenplugin testing support is not intended to be run standalone, rather it is bound to the maven integration test phase. Test driven development for gwt ui code trifork blog. Model view presenter was introduced in another episode back in february.
Gwt testing with first gwt application, gwt rpc, gwt panels, root panel, flow panel, html panel, form panel, scroll panel, grid, flex table, layout panel, root layout panel, dock layout panel, split layout panel, stack layout panel, ui blinder, internationalization, stock. The gwt has a test framework that is built on junit. Testing gwt applications isnt as straightforward as writing junit tests, but i do. With mockito it is pretty easy to mock all the involved gwt mvp infrastructure like activities, places, event bus and even a gwt remote procedure call. Helloworldtest class has an abstract method getmodulename that must return the name of the gwt module.
You will select the best suitable answer for the question and then proceed to the next question without wasting given time. The test class must be annotated with gwtmodule to tell gwt test utils which module is under test in the current test class. Youll be able to create units test that you can run in both development mode and production mode. Gwtbased applications in particular have this problem, but there are some ways ive found to develop useful and effective tests. Once the java code is finished, the gwt compiler translates the java code into html and javascript. Creating a junit test class for stockwatcher and the scripts to run it. There are 2 common ways to define the binding between views and presenters. Gwt provides a class to perform unit tests called gwttestcase, however it. This means that when youre running unit tests over components that execute. Gwt s testing infrastructure since a gwt application is almost entirely written in the java programming language, you can test a good part of it using standard junit testcases. Gwt also poses other issues in regards to simulating user input and locating dom elements, and i discuss those below. Tessell is a framework to reduce the mvp boilerplate i talked about in this post. May 04, 2012 testing presenter is where main functionality lives so, we mostly test the presenter using regular junit tests, mocking out the rest of the components for tests that absolutely need browser environment to be tested properly, we use gwttestcase class the rest is tested using some framework like selenium there is a lot to be. These tutorials are intended for developers who wish to write rich ajax applications using gwt.
In fact you can, but they will often times be slower than the average jrebased junit test. This way, the gwt hostedmode is not launched and the execution time is in the order of a few. If you are preparing to appear for a java and gwt framework related certification exam, then this section is a must for you. In gwt, presenters are represented by activities, views are implemented by gwt ui classes. All of them also advocate using an mvc or mvp model view presenter pattern. Now, i have also found my application code very hard to unit test on the parts that interact with smart gwt. Be careful to use a module youve declared in your metainf gwt test perties with the gwt module keyvalue pair. Gwt allows junit test cases to run in either development mode or production mode. In this section, youll add a junit unit test to the stockwatcher project. Ive added docs for these two approaches to gwt mvp tables.
If you are running a unit test, check that your test case extends gwttestcase and that gwt. The reason for using plain junit tests together with mocks is mostly speed. We use gwt mockito for writing the gwt user interface unit test. How to unit test gwtdispatch actionhandlers with guice. Architecting your gwtbased apps to utilize the model view presenter mvp paradigm provides the foundation and rails necessary to avoid some common pitfalls lets see first how the user sees the application and then what we will be doing from the mvp perspective from the users perspective. Does that mean i need to create fake duplicates of form1 and iform1 that are used to unit test my presenter. It provides the mechanism to allow the instantiation of gwt components without any web server. Choosing between a presenter and presenterwidget is a design decision that requires some thought. One of the core features of gwt is testability, which means we can easily test our applications using a set of triedandtrue testing tools.
To aid developers with their testing efforts, gwt provides integration with the popular junit unit testing framework and emma code coverage tool. To aid you with your testing efforts, gwt provides integration with the opensource junit testing framework. Gwts direct integration with junit lets you unit test both in a debugger and in a browser and you can even unit test asynchronous rpcs internationalization gwt internationalization support provides a variety of techniques to internationalize strings, typed values, and classes. It provides a simple way to write fast java tests for your gwt client code, without gwttestcase or any servlet container instance. This way, the gwt hostedmode is not launched and the execution time is. I was able to write mvp code and test the presenter and model code with just using mockito, but the view code couldnt be tested this way. Writing ajax applications testfirst, published in better software magazine november 2008. I use the mvp model view presenter pattern to do this. This is a library of gwt components widgets which helps to develop a rich web 2 ui more rapidly. Unit testing basics gwttestutilsgwttestutils wiki github. Helloworldtest class will contain unit test cases for helloworld.
Heres an easy recipe for running serverside unit tests against your actionhandlers. These are all files referenced by your gwt module, such as host html page, css or images. Testing gwt apps with selenium or webdriver carfey software. Nov 11, 2011 i use the mvp model view presenter pattern to do this. Thanks to guice, you can simply replace the real dispatch servlet with a dispatchtestservice that you call from your unit tests. Gwttestutils replaces the gwt classes bytecode on the fly. One of the core features of gwt is testability, which means we can easily test our applications using a set of triedandtrue testing. The test class must be annotated with gwtmodule to tell gwttestutils which module is under test in the current test class.
You will be presented multiple choice questions mcqs based on gwt concepts, where you will be given four options. Example application 1 welcome to the gwt tutorial series. Ideally we would write unittests, using junit, that perform the same. Writing ajax applications testfirst, published in better software. This article is a direct adaptation of daniel wellmans excellent article, gwt. Oct 21, 2009 i have previously written about navigation in gwtpresenter using the deckpresenter or widgetcontainerpresenter approaches. The view is where all the ui layout, data display and eventing necessary to intercept user interaction lives. Before getting into testing methodologies and design patterns we can use to test our gwt applications, lets first explain gwt s testing infrastructure. Write fast jre based unit tests, not slow gwttestcase based tests9. To demonstrate the benefits of using the mvp model to drive jrebased unit tests, rather than those based on gwttestcase, weve added the following tests to our contacts app. Oct 20, 2009 heres an easy recipe for running serverside unit tests against your actionhandlers.
This gwt online test simulates a real online certification exams. Presenter first, by atomic objects is a pattern similar to mvp used for building guis testfirst. If you find yourself using gwttestcase for testing nonui clientside logic you may not have a clear viewpresenter separation. In this case, the presenter needs an instance of form1, and form1 inherits from the interface iform1. Jan 16, 2012 the reason for using plain junit tests together with mocks is mostly speed. An api for creating gui similar to swing, which manipulates the web browsers document object model dom. The mvp model takes the pain out of unit testing a gwt app. Testing gwt resources examples presentations articles.
Gwt is only useful for java developers, if you are coming from a different background i dont think gwt will be helpful for you. The presenter is where almost all the code to unit test is. Youll pass it an action and get back a result just the same as you would from the client. But i still cant test the view, since i also work with smartgwt, and it seems i cant create any smartgwt object in the unit test. Aug 08, 2009 if you find yourself using gwttestcase for testing nonui clientside logic you may not have a clear view presenter separation. The test class must extend gwttest or one of its subclasses instead of the standard gwttestcase. Gwt testing with first gwt application, gwt rpc, gwt panels, root panel, flow panel, html panel, form panel, scroll panel, grid, flex table, layout panel, root layout panel, dock layout panel, split layout panel, stack layout panel, ui blinder, internationalization, stock exchange app example, gwt testing etc. This article introduces gwts testing infrastructure and demonstrates how to build an ajax application test first. Each example is set up to test adding a list of contactdetails, sorting those contactdetails, and then verifying that the sorted list is correct. Thats not to say that you cant write unit tests without using the mvp model. In gwt, presenters are represented by activities, views are. The location of these resources can be configured using element in module configuration file. This means you are able to use any java tool without restriction. For this article, im using the gwt sample application as my starting point.
Writing ajax applications testfirst by daniel wellman explains the different ways to test gwt applications, including an example of. If youre not familiar with gwt testing support you should first read the related documentation we do not consider gwttestcase to be unit test as they require the whole. This makes it possible to write gwt applications test firstan agile practice that helps build reliable and extensible applications. Creating a battery of good unit test cases is an important part of ensuring the quality of your application over its lifecycle. Unit testing the presenter in an mvp context using mock. For example, a presenterwidget is useful when you need a custom widget with extensive logic. In this tutorial, i will first make a very simple ajax application without any communication to server or database, then expand the application with database and rpc. Gwtmockito makes it possible for you to write mockito unit tests for your. Although, if you apply correctly the modelviewpresenter design pattern, you could minimize the use of gwttestcase, and write fast jre tests. Helloworldtest class extends the gwttestcase class in the com. The gwt test case will load up hosted mode under the covers and run your tests in a gwt environment. Unit and integration testing for gwt applications infoq. It cannot be called, for example, from server code.
Other than a few native libraries, everything is java source that can be built on any supported platform with the included gwt ant build files. Im building a gwt application and, per the latest best practices, using a mvp model view presenter approach. The library consists of such components like editable and hierarchical grid, date picker, etc. A quick read over the gwt docs should get you started. Either the presenter defines a display interface that the view has to implement, or the view interface provides a presenter interface.
Essentially you create tests and you can then test your widgets as java objects in your test case. Architecting your gwtbased apps to utilize the model view presenter mvp paradigm provides the foundation and rails necessary to avoid some common pitfalls lets see first how the user sees the application and then what we will be doing from the mvp perspective. Blackmagic web presenter takes the incoming hd or ultra hd input signal and automatically converts it to high quality, low data rate 720p hd, which is sent to your computer via usb for streaming. One special aspect of gwtmavenplugin to be familiar with is that it runs its own special test goal in order to support gwttestcase and gwttestsuite derived gwt tests. Does a mock object mean a completely made up object. Pages from your application will usually be singletons and extend the presenter class. The key to testing presenters is that they will be plain old java code and can. I was able to write mvp code and test the presenter and model code. This post was originally about the gwtmpv framework, which has since been rechristened tessell, see.
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