r2dbc Unit Test - repository doesn't return anything after saving entity - spring-webflux

Question

I'm learning Reative jdbc with R2DBC MySQL. I have a repository like this:
public interface UserRepository extends ReactiveCrudRepository<User, Long> {
Mono<User> findByEmail(String email);
I created an unit test in order to test the repository with a memory data base usin H2. The test file looks like this:
#RunWith(SpringRunner.class)
#DataR2dbcTest
#TestPropertySource(locations = "classpath:application-test.properties")
public class UserRepositoryTest {
#Autowired
private UserRepository userRepository;
#BeforeClass
public static void initDataBase() {
ConnectionFactory connectionFactory = ConnectionFactories.get("r2dbc:h2:mem:///testdb;DB_CLOSE_DELAY=-1;DATABASE_TO_UPPER=false;");
DatabaseClient databaseClient = DatabaseClient.create(connectionFactory);
R2dbcEntityTemplate template = new R2dbcEntityTemplate(databaseClient);
String query = "create table user (id int unsigned not null AUTO_INCREMENT, email varchar(50) not null, password varchar(100) not null, first_name varchar(50) not null, last_name varchar(50) not null, description varchar(50), phone_number varchar(50), user_image_id int unsigned, need_refresh_pass boolean not null, PRIMARY KEY (id));";
template.getDatabaseClient().execute(query).fetch().rowsUpdated().block();
}
That method creates the table because R2DBC doesn't create it automatically.
And then I have the test:
#Test
public void whenFindingAnUserReturnTheUserIfExist() {
User user = new User("email#mail.com", "pass", "name", "lastNmae", "description", "123123");
userRepository.save(user);
StepVerifier.create(userRepository.findByEmail("email#mail.com")).expectNextMatches(userCreated -> userCreated.getEmail().equals("email#mail.com")).verifyComplete();
}
When I run the test, the console shows:
java.lang.AssertionError: expectation "expectNextMatches" failed (expected: onNext(); actual: onComplete())
It seems to be that the findByEmail method doesn't return anything.
What am I doing wrong?
POM file:
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.3.0.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-webflux</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-r2dbc</artifactId>
</dependency>
<!-- For testing possibility -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>dev.miku</groupId>
<artifactId>r2dbc-mysql</artifactId>
<version>0.8.2.RELEASE</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>io.r2dbc</groupId>
<artifactId>r2dbc-h2</artifactId>
</dependency>

Answer 1

I realized my mistake.
I forgot to add .subscribe() to the method userRepository.save(user);
So the test method is:
#Test
public void whenFindingAnUserReturnTheUserIfExist() {
User user = new User("email#mail.com", "pass", "name", "lastNmae", "description", "123123");
userRepository.save(user).subscribe();
StepVerifier.create(userRepository.findByEmail("email#mail.com")).expectNextMatches(userCreated -> userCreated.getEmail().equals("email#mail.com")).verifyComplete();
}