{"id":12134,"date":"2013-04-30T19:00:16","date_gmt":"2013-04-30T16:00:16","guid":{"rendered":"http:\/\/www.javacodegeeks.com\/?p=12134"},"modified":"2013-04-30T08:33:31","modified_gmt":"2013-04-30T05:33:31","slug":"spring-mvc-introduction-in-testing","status":"publish","type":"post","link":"https:\/\/www.javacodegeeks.com\/2013\/04\/spring-mvc-introduction-in-testing.html","title":{"rendered":"Spring MVC: Introduction in testing"},"content":{"rendered":"

Testing is one of the most important parts of software development. Well organized testing helps to keep a code of application in a good state, in a working state. There are a lot of different types of test and methodologies. In this article I want to make an introduction in unit testing of applications based on Spring MVC. Don\u2019t hope to read all about Spring MVC testing here, because it\u2019s just a first article about unit testing.\"\"<\/p>\n

Speak about unit testing without some application, which I\u2019m going to test is deception. I\u2019ll use one of my applications<\/a> from the previous post, to avoid a gossip. I
\n 
\nrecommend to make a short overview of the application before you proceed read current post. The main goal of this tutorial is to demonstrate how to configure unit tests for a Spring MVC application in annotation maner.<\/p>\n

Preparations<\/h2>\n

The first thing which we always have to do before start any development \u2013 add of new dependencies in Maven\u2019s pom.xml file. This case isn\u2019t an exception.<\/p>\n

...\r\n\t\t<dependency>\r\n\t\t\t<groupid>org.springframework<\/groupid>\r\n\t\t\t<artifactid>spring-test<\/artifactid>\r\n\t\t\t<version>${spring.version}<\/version>\r\n\t\t\t<scope>test<\/scope>\r\n\t\t<\/dependency>\r\n\t\t<dependency>\r\n\t\t\t<groupid>org.springframework<\/groupid>\r\n\t\t\t<artifactid>spring-test-mvc<\/artifactid>\r\n\t\t\t<version>1.0.0.M1<\/version>\r\n\t\t\t<scope>test<\/scope>\r\n\t\t<\/dependency>\r\n...\r\n\t<repositories>\r\n\t\t<repository>\r\n\t\t\t<id>spring-maven-milestone<\/id>\r\n\t\t\t<name>Spring Maven Milestone Repository<\/name>\r\n\t\t\t<url>http:\/\/maven.springframework.org\/milestone<\/url>\r\n\t\t<\/repository>\r\n\t<\/repositories>\r\n...<\/pre>\n
I have added two new dependencies:<\/p>\n
    \n
  1. #1 spring-test<\/li>\n
  2. #2 spring-test-mvc<\/li>\n<\/ol>\n
    The first one is for support for testing Spring applications with tools such as JUnit and TestNG. This artifact is generally always defined with a \u2018test\u2019 scope for the integration testing framework and unit testing stubs. The second one is for testing Spring MVC server-side and client-side RestTemplate-based code. Pay your attention that I added a new repository. I did this because spring-test-mvc still isn\u2019t in official maven repository.
     
    <\/div> <\/div><\/p>\n
    Controller for the unit tests<\/h2>\n
    In this post I\u2019m going to write two unit tests for the most simple controller. Here is a code of the controller:<\/p>\n
    @Controller  \r\n    public class LinkController {  \r\n\r\n        @RequestMapping(value=\"\/\")  \r\n        public ModelAndView mainPage() {  \r\n            return new ModelAndView(\"home\");  \r\n        }  \r\n\r\n        @RequestMapping(value=\"\/index\")  \r\n        public ModelAndView indexPage() {  \r\n            return new ModelAndView(\"home\");  \r\n        }  \r\n\r\n    }<\/pre>\n
    So as you can see the methods in the controller is trivial, they just return some JSP. The testing of the controller implies check of request status (in success case the code should be 200) and verification of the view\u2019s name.<\/p>\n
    Writing of unit tests for Spring MVC<\/h2>\n
    Here is a quote of Petri Kainulainen<\/a>:<\/p>\n
    \n
    The heart of the spring-test-mvc is a class called MockMvc that can be used to write tests for any application implemented by using Spring MVC. Our goal is to create a new MockMvc object by using the implementations of the MockMvcBuilder interface. The MockMvcBuilders class has four static methods which we can use to obtain an implementation of the MockMvcBuilder interface. These methods are described in following:<\/p>\n