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In this article, I am going to share 10 of the best and essential tools, frameworks, and libraries which can help Java developer writing unit tests and integration tests on their various Java projects.
Almost all major IDEs like Eclipse, NetBeans, and IntelliJIDEA provides JUnit integration which means you can both write and run the unit test right from those IDE.
Most of us are still using JUnit 4 but JUnit 5 is already released and probably the next thing to look this year. You can use JUnit for both unit and integration testing and it also supports Java 8 features.
Btw, if you are a completely new in the unit testing world, particularly in Java unit testing then this JUnit and Mockito crash course is a good starting point.
If you are serious about writing an integration test for your REST API, then you must learn the REST Assured and REST API Testing Automation: via REST Assured & HTTP Client course on Udemy is a good place to start with, I have already joined this course and will put some time aside to learn this tool in 2019.
It covers many aspects of REST API testing e.g. Automated REST API Testing using Rest Assured Java and RESTful web service Testing via POSTMAN and HTTP Client.
The gap between JUnit and TestNG has reduced because of using annotations from JUnit 4 and integrating the Hamcrest matchers as well but it‘s up to you.
If you decide to learn TestNG for unit testing your Java code then TestNG Complete Bootcamp For Beginners - Novice To Ninja is a good course to start with.
It provides step by step guide for learning TestNG Framework (Next Generation) to speed up your automation goals
Mocking is one of the essential technique of modern-day unit testing, as it allows you to test your code in isolation without any dependency and that‘s why I encourage every Java developer to learn a mocking framework along with JUnit.
My favorite mocking framework is Mockito but if you like you can also explore PowerMock or JMock.
If you choose to stick with Mockito and decide to learn this framework then Mockito Tutorial: Learn mocking with 25 Junit Examples is a good course to start with.
Java and Groovy applications. It‘s written in Groovy which makes it very expressive and to the point specification language.
When you use Spock, your test will become more readable and easier to maintain and thanks to its JUnit runner, Spock is compatible with most IDEs, build tools, and continuous integration servers.
Unfortunately, I didn‘t find a useful course to learn Spock framework but Java Testing with Spock book is a good resource to start with.
It is one of the most useful libraries for writing automated tests to Spring applications. It provides first-class support for writing unit and integration tests to Spring-powered applications including MVC controllers.
There is also a Spring Test DbUnit that integrates the Spring Test framework with DbUnit and a Spring Test MVC HtmlUnit which integrates the Spring Test MVC framework with HtmlUnit.
By using these tools you can easily test your Spring MVC application in an automated way.
Core Java, and Web application and probably the biggest obstacle while doing unit testing.
It‘s not reliable to connect to Dev or UAT database for integration tests because anyone can change the data and schema e.g. tables, stored procedure and it will cause your automated integration test to fail.
DbUnit is a JUnit extension that can be used to initialize the database into a known state before each integration test and ensure that the database contains the correct data.
DbUnit has its own issues, but it is a very useful tool because it helps us to separate the test data creation from the tested code.
It is a keyword-driven testing framework that uses tabular test data syntax. You can use it to test distributed, heterogeneous applications, where verification requires touching several technologies and interfaces.
If you decide to learn this wonderful framework for integration test then Udemy‘s Robot Framework Test Automation is a great resource to start with. It‘s a two-part course which covers the basic and advanced features of Robot framework.
That‘s all about some of the essential unit testing and integration testing tools, frameworks, libraries for Java developers. There are many more libraries which I have not included in this list e.g. AssertJ, Hamcrest which can help you to write beautiful and fluent test but take things slowly.
To start with, learn a tool or library which you can use in your day-to-day work, for example, if you are working with Java UI then you should first learn Selenium because then you can focus on this tool more.
Similarly, if you are working on REST APIs then learn REST Assured. Similarly, if you are doing a lot of core Java work, then JUnit 5 is probably the first library you should look.
It doesn‘t matter much which tool to start first but make sure you spend some time to upgrade your skills in this New Year.
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Thanks for reading this article so far. If you like these tools then please share with your friends and colleagues on Facebook. If you have any questions or feedback then please drop a note.
Read more: https://javarevisited.blogspot.com/2018/01/10-unit-testing-and-integration-tools-for-java-programmers.html#ixzz60s1lBt5p
10 Unit Testing and Automation Tools and Libraries Java Programmers Should Learn
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原文地址：https://www.cnblogs.com/rongfengliang/p/11605859.html
