NoSuchElementException: No value present - как правильно создать Mock объект?

Всем привет. Есть REST приложение со Spring Boot. Пытаюсь разобраться и написать тесты для слоя Service. В качестве примера использую: https://www.baeldung.com/spring-boot-testing

Вот мой класс тестов:

import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mockito;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.TestConfiguration;
import org.springframework.boot.test.mock.mockito.MockBean;
import org.springframework.context.annotation.Bean;
import org.springframework.test.context.junit4.SpringRunner;

@RunWith(SpringRunner.class)
public class UserServiceTest {
    @MockBean
    private static UserRepository userRepository;
    @MockBean
    private static CipherService cipherService;
    @TestConfiguration
    static class UserServiceImplTestContextConfiguration {
        @Bean
        public UserService userService() {
            return new UserServiceImpl(userRepository, cipherService);
        }
    }
    @Autowired
    private UserService userService;
    @Before
    public void setUp() {
        User user = new User("user", "password");
        userRepository.findById(user.getName());
        Mockito.when(userRepository.findById(user.getName()).get())
                .thenReturn(user);
    }
    @Test
    public void whenValidName_thenUserShouldBeFound() {
        String name = "user";
        User found = userService.findByName(name);
        AssertionsForClassTypes.assertThat(found.getName()).isEqualTo(name);
    }
}

После запуска получаю :

java.util.NoSuchElementException: No value present

at java.util.Optional.get(Optional.java:135) at com.signing_bot.repository.UserServiceTest.setUp(UserServiceTest.java:45) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47) at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:24) at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75) at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86) at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:251) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61) at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190)

Помогите пожалуйста разобраться, где я косячу?