Integration with Testing Frameworks

• Spring boot allows easy integration with testing frameworks : JUnit 5(Jupiter) n Mockito.

Spring Boot Unit Testing (Data Layer)

@DataJpaTest Annotation

• Spring Boot provides the @DataJpaTest annotation to test the persistence layer components.
• It scans the @Entity classes and Spring Data JPA repositories.
• Sets the spring.jpa.show-sql property to true and enable the SQL queries logging.
• By Default, JPA test data are transactional and roll back at the end of each test; it means we do not need to clean up saved or modified table data after each test.
• Replace the application data source, run and configure the embedded database (in memory eg : H2 | HSQL) on run time classpath(build path)
• By default they will autoconfigure in-memory embedded database for testing purposes.
  • eg H2 database | HSQL
• But if you don't want to replace your original database by test database ,use
  • @AutoConfigureTestDatabase(replace = Replace.NONE)
• Since test cases should not modify the state of DB , by default rollback is applied after the execution of test cases.
• But , since we wanted to write test cases to insert the recs in emps table , marked
  • @Rollback(false)
• @DataJpaTest annotation doesn’t load other Spring beans (@Components, @Controller, @Service, and annotated beans) into ApplicationContext(SC)
• By default, it scans for @Entity classes and configures Spring Data JPA repositories annotated with @Repository annotation.
• To declare any method as the test case ,
  • use JUnit annotation - @Test - method level annotation.

Spring Boot Integration Testing

2.1 @SpringBootTest

• Spring Boot provides @SpringBootTest for integration testing
  • (eg : service +dao + DB)

2.2 @WebMvc