/*
 * Copyright 2002-2017 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.security.oauth2.client.userinfo;

import java.util.Arrays;
import java.util.Collections;

import org.junit.jupiter.api.Test;

import org.springframework.security.oauth2.core.user.OAuth2User;

import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.BDDMockito.given;
import static org.mockito.Mockito.mock;

/**
 * Tests for {@link DelegatingOAuth2UserService}.
 *
 * @author Joe Grandja
 */
public class DelegatingOAuth2UserServiceTests {

	@Test
	public void constructorWhenUserServicesIsNullThenThrowIllegalArgumentException() {
		assertThatIllegalArgumentException().isThrownBy(() -> new DelegatingOAuth2UserService<>(null));
	}

	@Test
	public void constructorWhenUserServicesIsEmptyThenThrowIllegalArgumentException() {
		assertThatIllegalArgumentException()
			.isThrownBy(() -> new DelegatingOAuth2UserService<>(Collections.emptyList()));
	}

	@Test
	@SuppressWarnings("unchecked")
	public void loadUserWhenUserRequestIsNullThenThrowIllegalArgumentException() {
		OAuth2UserService<OAuth2UserRequest, OAuth2User> userService = mock(OAuth2UserService.class);
		DelegatingOAuth2UserService<OAuth2UserRequest, OAuth2User> delegatingUserService = new DelegatingOAuth2UserService<>(
				Arrays.asList(userService, userService));
		assertThatIllegalArgumentException().isThrownBy(() -> delegatingUserService.loadUser(null));
	}

	@Test
	@SuppressWarnings("unchecked")
	public void loadUserWhenUserServiceCanLoadThenReturnUser() {
		OAuth2UserService<OAuth2UserRequest, OAuth2User> userService1 = mock(OAuth2UserService.class);
		OAuth2UserService<OAuth2UserRequest, OAuth2User> userService2 = mock(OAuth2UserService.class);
		OAuth2UserService<OAuth2UserRequest, OAuth2User> userService3 = mock(OAuth2UserService.class);
		OAuth2User mockUser = mock(OAuth2User.class);
		given(userService3.loadUser(any(OAuth2UserRequest.class))).willReturn(mockUser);
		DelegatingOAuth2UserService<OAuth2UserRequest, OAuth2User> delegatingUserService = new DelegatingOAuth2UserService<>(
				Arrays.asList(userService1, userService2, userService3));
		OAuth2User loadedUser = delegatingUserService.loadUser(mock(OAuth2UserRequest.class));
		assertThat(loadedUser).isEqualTo(mockUser);
	}

	@Test
	@SuppressWarnings("unchecked")
	public void loadUserWhenUserServiceCannotLoadThenReturnNull() {
		OAuth2UserService<OAuth2UserRequest, OAuth2User> userService1 = mock(OAuth2UserService.class);
		OAuth2UserService<OAuth2UserRequest, OAuth2User> userService2 = mock(OAuth2UserService.class);
		OAuth2UserService<OAuth2UserRequest, OAuth2User> userService3 = mock(OAuth2UserService.class);
		DelegatingOAuth2UserService<OAuth2UserRequest, OAuth2User> delegatingUserService = new DelegatingOAuth2UserService<>(
				Arrays.asList(userService1, userService2, userService3));
		OAuth2User loadedUser = delegatingUserService.loadUser(mock(OAuth2UserRequest.class));
		assertThat(loadedUser).isNull();
	}

}
