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Arquillian enables you to test your business logic in a remote or embedded container. Alternatively, it can deploy an archive to the container so the test can interact as a remote client. The mission of the Arquillian project is to provide a simple test harness that abstracts away all container lifecycle and deployment from the test logic so developers can easily produce a broad range of integration tests for their enterprise Java applications. Arquillian is part of the JBoss Testing initiative, an umbrella project focused on providing a comprehensive testing tool set for application developers. Arquillian can either execute a test case inside the container, in which case the test class is deployed by Arquillian along with the code under test, or hold back the test class so it can act as a remote client to the deployed code. All the developer has to do is write the test logic. In short... Arquillian makes integration testing a breeze!

JMock is a library that supports test-driven development1 of Java2 code with mock objects3. Mock objects help you design and test the interactions between the objects in your programs.

"JMock is a library that supports test-driven development of Java code with mock objects. Mock objects help you design and test the interactions between the objects in your programs. The jMock library: makes it quick and easy to define mock objects, so you don't break the rhythm of programming. lets you precisely specify the interactions between your objects, reducing the brittleness of your tests. works well with the autocompletion and refactoring features of your IDE plugs into your favourite test framework is easy to extend."

"JMockit allows developers to write unit/integration tests without the testability issues typically found with other mocking APIs. Tests can easily be written that will mock final classes, static methods, constructors, and so on. There are no limitations. The JMockit mocking API is simple, consistent, and minimal. There are no special methods or annotations that need to be used in test code, apart from those that really make sense. In general, the use of JMockit APIs for mocking leads to test code that is better structured and more readable. "

As Eclipse plug-in and Rich Client Platform developers, we face unique challenges in how we structure and execute our unit tests. In this article, I suggest an approach to unit testing based on Eclipse fragments that can help us overcome these challenges. If you find yourself frustrated with your current plug-in testing options, read on! But before going into detail on a fragment based solution, let's examine the current approaches and the pros and cons associated with each. The first approach is the one most of us start with as we learn the ropes of plug-in development: placing all code in a single plug-in.

Quick guide on where to use Assertion in Java with code example. Assertion in java is fairly underused feature but if used carefully can complement both Unit Testing and Exception handling. Since Assertion sits on code its gets more expose than unit testing and can test your function with more real data than one or two test data.

"Test in-container! Arquillian logo This space contains the user discussions and articles for the Arquillian project. The development discussions and articles are found in the Arquillian Development Space and the FAQs are located in the Arquillian FAQ Space. Information about the project can be found on the Project Site. We invite you to join us in the #jbosstesting channel on freenode IRC to chat about Arquillian, ShrinkWrap, Embedded AS and testing. This channel is logged by echelog and JBossBot is there to expand JIRA issues."

Mockito is a mocking framework that tastes really well. It lets you write beautiful tests with clean & simple API. Mockito doesn't give you hangover because the tests are very readable and they produce clean verification

"Executing external processes from Java is a well-known problem area. It is inheriently platform dependent and requires the developer to know and test for platform specific behaviors, for example using cmd.exe on Windows or limited buffer sizes causing deadlocks. The JRE support for this is very limited, albeit better with the new Java SE 1.5 ProcessBuilder class. Reliably executing external processes can also require knowledge of the environment variables before or after the command is executed. In J2SE 1.1-1.4 there is not support for this, since the method, System.getenv(), for retriving environment variables is deprecated. There are currently several different libraries that for their own purposes have implemented frameworks around Runtime.exec() to handle the various issues outlined above. The proposed project should aim at coordinating and learning from these initatives to create and maintain a simple, reusable and well-tested package. Since some of the more problematic platforms are not readily available, it is my hope that the broad Apache community can be a great help."

Shrinkwrap provides a simple mechanism to assemble archives like JARs, WARs, and EARs with a friendly, fluent API. JavaArchive archive = ShrinkWrap.create(JavaArchive.class,"archive.jar")    .addClasses(MyClass.class,MyOtherClass.class)    .addResource("mystuff.properties"); From there you may deploy directly into any supported integration container like JBoss EmbeddedAS, GlassFish v3 Embedded, Jetty, or OpenEJB.  Or perhaps you'd like to export the archive to a file or exploded directory structure.  Maybe you'd prefer to serialize it over the network to a remote host.  The possibilities are limitless. To boot, ShrinkWrap is the supported deployment mechanism of the Arquillian project, and together we render the testing of true enterprise components amiable as a puppy.  Where Java EE brought a POJO programming model to application development, we've brought it to testing.  You handle your business logic; we'll do the rest. To foster community participation, the majority of documentation and examples are available through our Wiki. Releases are available either via our Downloads section, or through the JBoss Maven Repository, which we recommend is configured in ${userHomeDir}/.m2/settings.xml:

Merit campus provides the best online java training. Learn Java programming if you are a beginner, Intermediate or an expert. Practice tests on creation of java, servlets, JDK, JRE, JVM, JIT, Java Compiler and Evolution of Java etc.

"EasyMock provides Mock Objects for interfaces (and objects through the class extension) by generating them on the fly using Java's proxy mechanism. Due to EasyMock's unique style of recording expectations, most refactorings will not affect the Mock Objects. So EasyMock is a perfect fit for Test-Driven Development. EasyMock is open source software available under the terms of the Apache 2.0 license. Development, downloads and issue tracking are hosted on SourceForge. "

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Asynchronous testing made easy

"LMAX aims to be the fastest trading platform in the world. Clearly, in order to achieve this we needed to do something special to achieve very low-latency and high-throughput with our Java platform. Performance testing showed that using queues to pass data between stages of the system was introducing latency, so we focused on optimising this area. "

Interview Questions on Java Swing for GUI Programmer.Swing is a difficult technology to learn and for programming GUI in swing you need a bit of expertize which makes demand of Swing developer quite high and same time make interview process for swing developer quite challenging and testing. Adding to it there are not much swing interview questions available on net. This article solve this problem by providing some of the best swing interview questions asked in banks. these questions are practical , genuine and same time challenging.

By applying the Model-View-Controller (MVC) architecture to a JavaTM 2 Platform, Enterprise Edition (J2EETM) application, you separate core business model functionality from the presentation and control logic that uses this functionality. Such separation allows multiple views to share the same enterprise data model, which makes supporting multiple clients easier to implement, test, and maintain.

Java BluePrints Model-View-Controller

"Welcome to the home of Spring, the leading platform to build and run enterprise Java applications. Led and sustained by SpringSource, Spring delivers significant benefits for many projects, increasing development productivity and runtime performance while improving test coverage and application quality."

Database Change Management You never develop code without version control, why do you develop your database without it? Liquibase is an open source (Apache 2.0 Licensed), database-independent library for tracking, managing and applying database changes. It is built on a simple premise: All database changes are stored in a human readable yet trackable form and checked into source control. Liquibase Supports: Extensibility Merging changes from multiple developers Code branches Multiple Databases Managing production data as well as various test datasets Cluster-safe database upgrades Automated updates or generation of SQL scripts that can be approved and applied by a DBA Update rollbacks Database "diff"s Generating starting change logs from existing database

migrate4j is a database migration tool. Suppose you determine that you need a new database table for your project. If you develop alone, you could write an SQL script that adds a table and manually apply this to your development system. But if you work with other developers, or need to keep a test system in synch with your development system, this become tedious and error prone. Migration tools make it possible to add your new table (or make any other schema changes) in an automated fashion, ensuring all your systems are always in synch. Migration tools also make it possible to quickly and easily roll back previous changes. Unlike typing commands into an interactive SQL window or storing SQL scripts, migration tools keep a detailed history of how your database schema evolved (just in case you need to go back to a previous version). Finally, migration tools minimize or eliminate the problem of having to use vendor specific syntax - you may never switch database products, but if you do, using a migration tool will make your life much easier. The initial intent of migrate4j was to make a Java version of Ruby's db:migrate. If you've used db:migrate, you probably fell in love with it's simple syntax, easy configuration and ability to roll changes up and back effortlessly. The intent (and the challenge) of migrate4j is to bring the power and simplicity of db:migrate to Java programmers, using familiar type safety and syntax. Along the way, we're adding additional functionality that makes migrate4j more than just another Ruby tool rewritten for Java - it is a Java project intended to make other Java projects even better.