40-Spring-Boot-Testing-and-MockMVC

Question 1

What is the jar file that the MVC testing framework is located?

Answer 1

spring-test.jar

Question 2

What’re the targets of @MockBean? Example for each

Answer 2

Type and field
Field: @MockBean UserService userService;
Type:
@MockBean(UserService.class)
@MockBean(CustomerService.class)
class TestClass {
    @Autowired UserService userService;
    // ...
}

Question 3

Annotations provided by Spring Boot Testing framework?

Answer 3

1. @SpringBootTest
2. @WebMvcTest, @WebFluxTest
3. @DataJpaTest, @DataJdbcTest, @JdbcTest
4. @DataMongoTest, @DataRedisTest
5. @MockBean

Question 4

Starter for Spring boot test

Answer 4

spring-boot-starter-test

Question 5

List of testing dependencies (not not of jar file) in Spring boot test

Answer 5

1. JUnit
2. Spring Test & Spring Boot Test
3. AssertJ
4. Hamcrest
5. Mockito
6. JSONAssert
7. JsonPath - XPath for JSON

Question 6

What happens when the test class is annotated with @SpringBootTest?

Answer 6

Happen:
1. Search for @SpringBootConfiguration and start application-context
2. Auto-configure TestRestTemplate
@SpringBootApplication is annotated with @SpringBootConfiguration

Question 7

What are webEnvironment modes in SpringBootTest?

Answer 7

RANDOM_PORT
DEFINED_PORT
MOCK
NONE

Question 8

What happens when setting webEnviroment to MOCK?

Answer 8

Message sending via TestRestTemplate will send directly to DispatcherServlet

Question 9

What are the benefits of using TestRestTemplate?

Answer 9

1. Relative paths
2. Fault-tolerant: does not throw an exception if server return error HTTP status
3. Configured to ignore cookies and redirects

Question 10

How to get the current port when webEnvironment is set to RANDOM_PORT?

Answer 10

1. @LocalServerPort

2. @Value(“${local.server.port}”)

Question 11

In TestRestTemplate, what methods do not return a result?

Answer 11

1. delete

2. put

Question 12

What are TestRestTemplate.{*ForEntity, *ForObject, *ForLocation}?

Answer 12

• ForEntity: return ResponseEntity from here we can get response status
• ForObject: return result. Null if not successful
• ForLocation: return location of newly created object

Question 13

Annotations inside @WebMvcTest

Answer 13

@SpringBootTest(webEnvironment=MOCK)

@AutoConfigureMockMvc

Question 14

What @WebMvcTest do?

Answer 14

1. Disable full auto-configuration and apply only relevant configurations to MVC tests
2. Auto configure MockMvc
3. Optionally Spring security

Question 15

What are 2 classes that support fluid builders when using MockMvc?

Answer 15

MockMvcRequestBuilders

MockMvcRequestMatchers

Question 16

Get and expect 200 and the field “name” having value “David” with MockMvc

Answer 16

mockMvc.perform(get(“…”))
.andExpect(status().isOk())
.andExpect(jsonPath(“name”).value(“David”));

Question 17

What @DataJpaTest do?

Answer 17

1. Load @Repository beans and ignore other components
2. Auto configure TestEntityManager
3. Use embedded in-memory database

Question 18

How to override auto-configured database (in-memory DB) in tests?

Answer 18

Using @ AutoConfigureTestDatabase

Question 19

What view templates are supported by Spring?

Answer 19

FreeMarker
GroovyMarkup
Tiles
Mustache
Thymeleaf
Velocity
GSP (groovy)