Test cases

All the tests are put in the test module with the same package name of the code. Mainly the test cases are written for the Controller, but you can even write for Repository for which you'll need to mock the database using Mockito or some other mocking library.

The MockMvc class is the entry point for performing server-side tests. We can perform HTTP requests such as GET, POST, and others on the URLs to test the REST endpoints.

MessageControllerTests: Test cases for the MessageController are written in human readable names using ` while writing function names.

Consider the following example:

    @RunWith(SpringRunner::class)
    @SpringBootTest
    class MessageControllerTests {

      @Autowired lateinit var context: WebApplicationContext
      @Autowired lateinit var messageRepository: MessageRepository
      @Autowired lateinit var mapper: ObjectMapper

      /**
       * Entry point to server side tests
       */
       lateinit var mockMvc: MockMvc

       @Before
       fun setup() {
         messageRepository.deleteAll()
         mockMvc = webAppContextSetup(this.context).build()
       }

       @Test
       fun `Create new message`() {
         val message = Message("""We have some dummy message over here  
          to perform some testing and I have started to write test  
          cases for my code""".trimMargin()
          , Point(0.0, 0.0))
          mockMvc.perform(post("/message")
          .content(mapper.writeValueAsString(message))
          .contentType(APPLICATION_JSON_UTF8))
          .andExpect(status().isCreated)
        }

        @Test
        fun `Get all messages`() {
          messageRepository.insert(Message("I love Kotlin"))
           messageRepository.insert(Message("I love this book", 
           Point(0.0, 0.0)))
           mockMvc.perform(get("/message")
           .accept(APPLICATION_JSON_UTF8)).andExpect(status().isOk)
        }

        @Test
        fun `Find messages in the specified region`() {
          messageRepository.insert(Message("I love Kotlin", Point(0.0,  
           0.0)))
          messageRepository.insert(Message("I love this book", 
           Point(1.0, 1.0)))
           mockMvc.perform(get("/message/bbox/{xMin},{yMin},{xMax},
           {yMax}", -1, -1, 2, 2)
           .accept(APPLICATION_JSON_UTF8))
           .andExpect(status().isOk)
        }

        @Test
        fun `Subscribe to the message`() {
          mockMvc.perform(get("/message/subscribe"))
           .andExpect(status().isOk)
        }

    }