Building Web Apps with Spring 5 and Angular

Unit tests for controllers

Let's understand some of the following concepts before we get to look at the source codes for controllers and the corresponding unit tests written using JUnit 5:

• MockMvc: This is a Spring MVC component primarily used for writing unit tests with controllers components. Simply speaking, MockMvc is used to mock the Spring MVC container. The following is what the code looks like when using MockMvc:

        private MockMvc mockMvc;        @MockBean        private UserService userService;         @BeforeEach        public void setUp() throws Exception {          this.mockMvc = MockMvcBuilders.standaloneSetup(new              UserAccountController(this.userService)).build();        }

In the preceding code, UserService, a dependency within the controller, is mocked using the @MockBean ...