MongoUserDetailsServiceTest.java

package com.piggymetrics.auth.service.security;

import com.piggymetrics.auth.domain.User;
import com.piggymetrics.auth.repository.UserRepository;
import org.junit.Before;
import org.junit.Test;
import org.mockito.InjectMocks;
import org.mockito.Mock;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UsernameNotFoundException;

import static org.junit.Assert.assertEquals;
import static org.mockito.Matchers.any;
import static org.mockito.Mockito.when;
import static org.mockito.MockitoAnnotations.initMocks;

public class MongoUserDetailsServiceTest {

	@InjectMocks
	private MongoUserDetailsService service;

	@Mock
	private UserRepository repository;

	@Before
	public void setup() {
		initMocks(this);
	}

	@Test
	public void shouldLoadByUsernameWhenUserExists() {

		final User user = new User();

		when(repository.findOne(any())).thenReturn(user);
		UserDetails loaded = service.loadUserByUsername("name");

		assertEquals(user, loaded);
	}

	@Test(expected = UsernameNotFoundException.class)
	public void shouldFailToLoadByUsernameWhenUserNotExists() {
		service.loadUserByUsername("name");
	}
}