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POSpring Framework TEST RESTful Web Service (Controller) Offline i.e. No Server, No Database
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copied!<p>I have a very simple RESTful Controller that consumes and produces JSON. I need to test this controller offline i.e. no server running, no database running. And I am going nuts for not being able to find a solution. My intial test cases will include:</p> <ul> <li>Test REST URIs i.e. GET, POST, PUT, DELETE - I must be able to Assert data returned against data sent.</li> <li>Assert will test JSON data</li> </ul> <p>I have the following URIs:</p> <ul> <li>/pcusers - Returns all users</li> <li>/pcusers/{id} - Return a specific user</li> <li>/pcusers/create/{pcuser} - Add user to db</li> <li>/pcusers/update/{pcuser} - Update user</li> <li>/pcusers/delete/{id} - Delete User</li> </ul> <p>NOTE: This is NOT a typical MVC application. I DO NOT have Views. I have a pure REST controller that spits out JSON and consumes data in JSON format.</p> <p>If someone could guide me in the right direction would be really appreciated.</p> <p>Just to be clear how my code looks like:</p> <pre><code>@Controller @RequestMapping("/pcusers") public class PcUserController { protected static Logger logger = Logger.getLogger(PcUserController.class); @Resource(name = "pcUserService") private PcUserService pcUserService; @RequestMapping(value = "", method = RequestMethod.GET, produces = "application/json") @ResponseBody public List<PcUser> readAll() { logger.debug("Delegating to service to return all PcUsers"); return pcUserService.readAll(); } @RequestMapping(value = "/{id}", method = RequestMethod.GET, consumes = "application/json", produces = "application/json") @ResponseBody public PcUser read(@PathVariable String id) { logger.debug("Delegating to service to return PcUser " + id); return pcUserService.read(id); } @RequestMapping(value = "/create/{pcUser}", method = RequestMethod.POST, consumes = "application/json", produces = "application/json") @ResponseBody public boolean create(@PathVariable PcUser pcUser) { logger.debug("Delegating to service to create new PcUser"); return pcUserService.create(pcUser); } @RequestMapping(value = "/update/{pcUser}", method = RequestMethod.POST, consumes = "application/json", produces = "application/json") @ResponseBody public boolean update(@PathVariable PcUser pcUser) { logger.debug("Delegating to service to update existing PcUser"); return pcUserService.update(pcUser); } @RequestMapping(value = "/delete/{id}", method = RequestMethod.POST, consumes = "application/json", produces = "application/json") @ResponseBody public boolean delete(@PathVariable String id) { logger.debug("Delegating to service to delete existing PcUser"); return pcUserService.delete(id); } } </code></pre> <p><strong>UPDATE (2/5/2012):</strong> After some research, I came across a Spring framework called <strong>spring-test-mvc</strong>. It looks very promising and I have managed to get a good start on this. But now I have a new problem. When I submit a GET request to "/pcusers/{id}", the control is passed to <strong>read</strong> method which is responsible for handling that mapping. Inside that method I have a <strong>pcUserService</strong> that does a read. Now, the problem is when I run this test, the <strong>pcUserService</strong> instance inside real controller is NULL; and therefore it ends up crashing as read cannot be called on a NULL object.</p> <p>Here's <strong>PcUserControllerTest</strong> code:</p> <pre><code>@RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration(locations = "classpath:/applicationContextTest.xml") public class PcUserControllerTest { @Autowired PcUserService pcUserService; @Autowired PcUserController pcUserController; PcUser pcUser; @Before public void setUp() throws Exception { pcUser = new PcUser("John", "Li", "Weasley", "john", "john", new DateTime()); pcUserService.create(pcUser); } public void tearDown() throws Exception { pcUserService.delete(pcUser.getId()); } @Test public void shouldGetPcUser() throws Exception { standaloneSetup(pcUserController) .build() .perform(get("/pcusers/" + pcUser.getId()).accept(MediaType.APPLICATION_JSON)) .andExpect(status().isOk()); } } </code></pre>

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