/*
 * Copyright 2020-2021 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.server.authorization.authentication;

import java.security.Principal;
import java.time.Duration;
import java.time.Instant;
import java.time.temporal.ChronoUnit;
import java.util.Set;

import org.junit.Before;
import org.junit.Test;
import org.mockito.ArgumentCaptor;

import org.springframework.security.authentication.TestingAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.oauth2.core.AuthorizationGrantType;
import org.springframework.security.oauth2.core.ClientAuthenticationMethod;
import org.springframework.security.oauth2.core.OAuth2AuthenticationException;
import org.springframework.security.oauth2.core.OAuth2ErrorCodes;
import org.springframework.security.oauth2.core.endpoint.OAuth2AuthorizationRequest;
import org.springframework.security.oauth2.core.endpoint.OAuth2ParameterNames;
import org.springframework.security.oauth2.core.oidc.OidcIdToken;
import org.springframework.security.oauth2.core.oidc.OidcScopes;
import org.springframework.security.oauth2.core.oidc.endpoint.OidcParameterNames;
import org.springframework.security.oauth2.jose.jws.SignatureAlgorithm;
import org.springframework.security.oauth2.jwt.JoseHeaderNames;
import org.springframework.security.oauth2.jwt.Jwt;
import org.springframework.security.oauth2.jwt.JwtClaimsSet;
import org.springframework.security.oauth2.jwt.JwtEncoder;
import org.springframework.security.oauth2.server.authorization.OAuth2Authorization;
import org.springframework.security.oauth2.server.authorization.OAuth2AuthorizationService;
import org.springframework.security.oauth2.server.authorization.TestOAuth2Authorizations;
import org.springframework.security.oauth2.server.authorization.TokenType;
import org.springframework.security.oauth2.server.authorization.client.RegisteredClient;
import org.springframework.security.oauth2.server.authorization.client.TestRegisteredClients;
import org.springframework.security.oauth2.server.authorization.token.JwtEncodingContext;
import org.springframework.security.oauth2.server.authorization.token.OAuth2AuthorizationCode;
import org.springframework.security.oauth2.server.authorization.token.OAuth2TokenCustomizer;

import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.Assertions.assertThatThrownBy;
import static org.assertj.core.api.Assertions.entry;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.ArgumentMatchers.eq;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

/**
 * Tests for {@link OAuth2AuthorizationCodeAuthenticationProvider}.
 *
 * @author Joe Grandja
 * @author Daniel Garnier-Moiroux
 */
public class OAuth2AuthorizationCodeAuthenticationProviderTests {
	private static final String AUTHORIZATION_CODE = "code";
	private OAuth2AuthorizationService authorizationService;
	private JwtEncoder jwtEncoder;
	private OAuth2TokenCustomizer<JwtEncodingContext> jwtCustomizer;
	private OAuth2AuthorizationCodeAuthenticationProvider authenticationProvider;

	@Before
	public void setUp() {
		this.authorizationService = mock(OAuth2AuthorizationService.class);
		this.jwtEncoder = mock(JwtEncoder.class);
		this.authenticationProvider = new OAuth2AuthorizationCodeAuthenticationProvider(
				this.authorizationService, this.jwtEncoder);
		this.jwtCustomizer = mock(OAuth2TokenCustomizer.class);
		this.authenticationProvider.setJwtCustomizer(this.jwtCustomizer);
	}

	@Test
	public void constructorWhenAuthorizationServiceNullThenThrowIllegalArgumentException() {
		assertThatThrownBy(() -> new OAuth2AuthorizationCodeAuthenticationProvider(null, this.jwtEncoder))
				.isInstanceOf(IllegalArgumentException.class)
				.hasMessage("authorizationService cannot be null");
	}

	@Test
	public void constructorWhenJwtEncoderNullThenThrowIllegalArgumentException() {
		assertThatThrownBy(() -> new OAuth2AuthorizationCodeAuthenticationProvider(this.authorizationService, null))
				.isInstanceOf(IllegalArgumentException.class)
				.hasMessage("jwtEncoder cannot be null");
	}

	@Test
	public void setJwtCustomizerWhenNullThenThrowIllegalArgumentException() {
		assertThatThrownBy(() -> this.authenticationProvider.setJwtCustomizer(null))
				.isInstanceOf(IllegalArgumentException.class)
				.hasMessage("jwtCustomizer cannot be null");
	}

	@Test
	public void supportsWhenTypeOAuth2AuthorizationCodeAuthenticationTokenThenReturnTrue() {
		assertThat(this.authenticationProvider.supports(OAuth2AuthorizationCodeAuthenticationToken.class)).isTrue();
	}

	@Test
	public void authenticateWhenClientPrincipalNotOAuth2ClientAuthenticationTokenThenThrowOAuth2AuthenticationException() {
		RegisteredClient registeredClient = TestRegisteredClients.registeredClient().build();
		TestingAuthenticationToken clientPrincipal = new TestingAuthenticationToken(
				registeredClient.getClientId(), registeredClient.getClientSecret());
		OAuth2AuthorizationCodeAuthenticationToken authentication =
				new OAuth2AuthorizationCodeAuthenticationToken(AUTHORIZATION_CODE, clientPrincipal, null, null);
		assertThatThrownBy(() -> this.authenticationProvider.authenticate(authentication))
				.isInstanceOf(OAuth2AuthenticationException.class)
				.extracting(ex -> ((OAuth2AuthenticationException) ex).getError())
				.extracting("errorCode")
				.isEqualTo(OAuth2ErrorCodes.INVALID_CLIENT);
	}

	@Test
	public void authenticateWhenClientPrincipalNotAuthenticatedThenThrowOAuth2AuthenticationException() {
		RegisteredClient registeredClient = TestRegisteredClients.registeredClient().build();
		OAuth2ClientAuthenticationToken clientPrincipal = new OAuth2ClientAuthenticationToken(
				registeredClient.getClientId(), registeredClient.getClientSecret(), ClientAuthenticationMethod.BASIC, null);
		OAuth2AuthorizationCodeAuthenticationToken authentication =
				new OAuth2AuthorizationCodeAuthenticationToken(AUTHORIZATION_CODE, clientPrincipal, null, null);
		assertThatThrownBy(() -> this.authenticationProvider.authenticate(authentication))
				.isInstanceOf(OAuth2AuthenticationException.class)
				.extracting(ex -> ((OAuth2AuthenticationException) ex).getError())
				.extracting("errorCode")
				.isEqualTo(OAuth2ErrorCodes.INVALID_CLIENT);
	}

	@Test
	public void authenticateWhenInvalidCodeThenThrowOAuth2AuthenticationException() {
		RegisteredClient registeredClient = TestRegisteredClients.registeredClient().build();
		OAuth2ClientAuthenticationToken clientPrincipal = new OAuth2ClientAuthenticationToken(registeredClient);
		OAuth2AuthorizationCodeAuthenticationToken authentication =
				new OAuth2AuthorizationCodeAuthenticationToken(AUTHORIZATION_CODE, clientPrincipal, null, null);
		assertThatThrownBy(() -> this.authenticationProvider.authenticate(authentication))
				.isInstanceOf(OAuth2AuthenticationException.class)
				.extracting(ex -> ((OAuth2AuthenticationException) ex).getError())
				.extracting("errorCode")
				.isEqualTo(OAuth2ErrorCodes.INVALID_GRANT);
	}

	@Test
	public void authenticateWhenCodeIssuedToAnotherClientThenThrowOAuth2AuthenticationException() {
		OAuth2Authorization authorization = TestOAuth2Authorizations.authorization().build();
		when(this.authorizationService.findByToken(eq(AUTHORIZATION_CODE), eq(TokenType.AUTHORIZATION_CODE)))
				.thenReturn(authorization);

		OAuth2ClientAuthenticationToken clientPrincipal = new OAuth2ClientAuthenticationToken(
				TestRegisteredClients.registeredClient2().build());
		OAuth2AuthorizationCodeAuthenticationToken authentication =
				new OAuth2AuthorizationCodeAuthenticationToken(AUTHORIZATION_CODE, clientPrincipal, null, null);
		assertThatThrownBy(() -> this.authenticationProvider.authenticate(authentication))
				.isInstanceOf(OAuth2AuthenticationException.class)
				.extracting(ex -> ((OAuth2AuthenticationException) ex).getError())
				.extracting("errorCode")
				.isEqualTo(OAuth2ErrorCodes.INVALID_GRANT);

		ArgumentCaptor<OAuth2Authorization> authorizationCaptor = ArgumentCaptor.forClass(OAuth2Authorization.class);
		verify(this.authorizationService).save(authorizationCaptor.capture());
		OAuth2Authorization updatedAuthorization = authorizationCaptor.getValue();
		OAuth2Authorization.Token<OAuth2AuthorizationCode> authorizationCode =
				updatedAuthorization.getToken(OAuth2AuthorizationCode.class);
		assertThat(authorizationCode.isInvalidated()).isTrue();
	}

	@Test
	public void authenticateWhenInvalidRedirectUriThenThrowOAuth2AuthenticationException() {
		RegisteredClient registeredClient = TestRegisteredClients.registeredClient().build();
		OAuth2Authorization authorization = TestOAuth2Authorizations.authorization(registeredClient).build();
		when(this.authorizationService.findByToken(eq(AUTHORIZATION_CODE), eq(TokenType.AUTHORIZATION_CODE)))
				.thenReturn(authorization);

		OAuth2ClientAuthenticationToken clientPrincipal = new OAuth2ClientAuthenticationToken(registeredClient);
		OAuth2AuthorizationRequest authorizationRequest = authorization.getAttribute(
				OAuth2AuthorizationRequest.class.getName());
		OAuth2AuthorizationCodeAuthenticationToken authentication =
				new OAuth2AuthorizationCodeAuthenticationToken(AUTHORIZATION_CODE, clientPrincipal, authorizationRequest.getRedirectUri() + "-invalid", null);
		assertThatThrownBy(() -> this.authenticationProvider.authenticate(authentication))
				.isInstanceOf(OAuth2AuthenticationException.class)
				.extracting(ex -> ((OAuth2AuthenticationException) ex).getError())
				.extracting("errorCode")
				.isEqualTo(OAuth2ErrorCodes.INVALID_GRANT);
	}

	@Test
	public void authenticateWhenInvalidatedCodeThenThrowOAuth2AuthenticationException() {
		RegisteredClient registeredClient = TestRegisteredClients.registeredClient().build();
		OAuth2AuthorizationCode authorizationCode = new OAuth2AuthorizationCode(
				AUTHORIZATION_CODE, Instant.now(), Instant.now().plusSeconds(120));
		OAuth2Authorization authorization = TestOAuth2Authorizations.authorization(registeredClient)
				.token(authorizationCode, (metadata) -> metadata.put(OAuth2Authorization.Token.INVALIDATED_METADATA_NAME, true))
				.build();
		when(this.authorizationService.findByToken(eq(AUTHORIZATION_CODE), eq(TokenType.AUTHORIZATION_CODE)))
				.thenReturn(authorization);

		OAuth2ClientAuthenticationToken clientPrincipal = new OAuth2ClientAuthenticationToken(registeredClient);
		OAuth2AuthorizationRequest authorizationRequest = authorization.getAttribute(
				OAuth2AuthorizationRequest.class.getName());
		OAuth2AuthorizationCodeAuthenticationToken authentication =
				new OAuth2AuthorizationCodeAuthenticationToken(AUTHORIZATION_CODE, clientPrincipal, authorizationRequest.getRedirectUri(), null);

		assertThatThrownBy(() -> this.authenticationProvider.authenticate(authentication))
				.isInstanceOf(OAuth2AuthenticationException.class)
				.extracting(ex -> ((OAuth2AuthenticationException) ex).getError())
				.extracting("errorCode")
				.isEqualTo(OAuth2ErrorCodes.INVALID_GRANT);
	}

	@Test
	public void authenticateWhenValidCodeThenReturnAccessToken() {
		RegisteredClient registeredClient = TestRegisteredClients.registeredClient().build();
		OAuth2Authorization authorization = TestOAuth2Authorizations.authorization(registeredClient).build();
		when(this.authorizationService.findByToken(eq(AUTHORIZATION_CODE), eq(TokenType.AUTHORIZATION_CODE)))
				.thenReturn(authorization);

		OAuth2ClientAuthenticationToken clientPrincipal = new OAuth2ClientAuthenticationToken(registeredClient);
		OAuth2AuthorizationRequest authorizationRequest = authorization.getAttribute(
				OAuth2AuthorizationRequest.class.getName());
		OAuth2AuthorizationCodeAuthenticationToken authentication =
				new OAuth2AuthorizationCodeAuthenticationToken(AUTHORIZATION_CODE, clientPrincipal, authorizationRequest.getRedirectUri(), null);

		when(this.jwtEncoder.encode(any(), any())).thenReturn(createJwt());

		OAuth2AccessTokenAuthenticationToken accessTokenAuthentication =
				(OAuth2AccessTokenAuthenticationToken) this.authenticationProvider.authenticate(authentication);

		ArgumentCaptor<JwtEncodingContext> jwtEncodingContextCaptor = ArgumentCaptor.forClass(JwtEncodingContext.class);
		verify(this.jwtCustomizer).customize(jwtEncodingContextCaptor.capture());
		JwtEncodingContext jwtEncodingContext = jwtEncodingContextCaptor.getValue();
		assertThat(jwtEncodingContext.getRegisteredClient()).isEqualTo(registeredClient);
		assertThat(jwtEncodingContext.<Authentication>getPrincipal()).isEqualTo(authorization.getAttribute(Principal.class.getName()));
		assertThat(jwtEncodingContext.getAuthorization()).isEqualTo(authorization);
		assertThat(jwtEncodingContext.getTokenType()).isEqualTo(TokenType.ACCESS_TOKEN);
		assertThat(jwtEncodingContext.getAuthorizationGrantType()).isEqualTo(AuthorizationGrantType.AUTHORIZATION_CODE);
		assertThat(jwtEncodingContext.<OAuth2AuthorizationGrantAuthenticationToken>getAuthorizationGrant()).isEqualTo(authentication);
		assertThat(jwtEncodingContext.getHeaders()).isNotNull();
		assertThat(jwtEncodingContext.getClaims()).isNotNull();

		ArgumentCaptor<JwtClaimsSet> jwtClaimsSetCaptor = ArgumentCaptor.forClass(JwtClaimsSet.class);
		verify(this.jwtEncoder).encode(any(), jwtClaimsSetCaptor.capture());
		JwtClaimsSet jwtClaimsSet = jwtClaimsSetCaptor.getValue();

		Set<String> scopes = jwtClaimsSet.getClaim(OAuth2ParameterNames.SCOPE);
		assertThat(scopes).isEqualTo(authorization.getAttribute(OAuth2Authorization.AUTHORIZED_SCOPE_ATTRIBUTE_NAME));
		assertThat(jwtClaimsSet.getSubject()).isEqualTo(authorization.getPrincipalName());

		ArgumentCaptor<OAuth2Authorization> authorizationCaptor = ArgumentCaptor.forClass(OAuth2Authorization.class);
		verify(this.authorizationService).save(authorizationCaptor.capture());
		OAuth2Authorization updatedAuthorization = authorizationCaptor.getValue();

		assertThat(accessTokenAuthentication.getRegisteredClient().getId()).isEqualTo(updatedAuthorization.getRegisteredClientId());
		assertThat(accessTokenAuthentication.getPrincipal()).isEqualTo(clientPrincipal);
		assertThat(accessTokenAuthentication.getAccessToken()).isEqualTo(updatedAuthorization.getAccessToken().getToken());
		assertThat(accessTokenAuthentication.getRefreshToken()).isNotNull();
		assertThat(accessTokenAuthentication.getRefreshToken()).isEqualTo(updatedAuthorization.getRefreshToken().getToken());
		OAuth2Authorization.Token<OAuth2AuthorizationCode> authorizationCode = updatedAuthorization.getToken(OAuth2AuthorizationCode.class);
		assertThat(authorizationCode.isInvalidated()).isTrue();
	}

	@Test
	public void authenticateWhenValidCodeAndAuthenticationRequestThenReturnIdToken() {
		RegisteredClient registeredClient = TestRegisteredClients.registeredClient().scope(OidcScopes.OPENID).build();
		OAuth2Authorization authorization = TestOAuth2Authorizations.authorization(registeredClient).build();
		when(this.authorizationService.findByToken(eq(AUTHORIZATION_CODE), eq(TokenType.AUTHORIZATION_CODE)))
				.thenReturn(authorization);

		OAuth2ClientAuthenticationToken clientPrincipal = new OAuth2ClientAuthenticationToken(registeredClient);
		OAuth2AuthorizationRequest authorizationRequest = authorization.getAttribute(
				OAuth2AuthorizationRequest.class.getName());
		OAuth2AuthorizationCodeAuthenticationToken authentication =
				new OAuth2AuthorizationCodeAuthenticationToken(AUTHORIZATION_CODE, clientPrincipal, authorizationRequest.getRedirectUri(), null);

		when(this.jwtEncoder.encode(any(), any())).thenReturn(createJwt());

		OAuth2AccessTokenAuthenticationToken accessTokenAuthentication =
				(OAuth2AccessTokenAuthenticationToken) this.authenticationProvider.authenticate(authentication);

		ArgumentCaptor<JwtEncodingContext> jwtEncodingContextCaptor = ArgumentCaptor.forClass(JwtEncodingContext.class);
		verify(this.jwtCustomizer, times(2)).customize(jwtEncodingContextCaptor.capture());
		// Access Token context
		JwtEncodingContext accessTokenContext = jwtEncodingContextCaptor.getAllValues().get(0);
		assertThat(accessTokenContext.getRegisteredClient()).isEqualTo(registeredClient);
		assertThat(accessTokenContext.<Authentication>getPrincipal()).isEqualTo(authorization.getAttribute(Principal.class.getName()));
		assertThat(accessTokenContext.getAuthorization()).isEqualTo(authorization);
		assertThat(accessTokenContext.getTokenType()).isEqualTo(TokenType.ACCESS_TOKEN);
		assertThat(accessTokenContext.getAuthorizationGrantType()).isEqualTo(AuthorizationGrantType.AUTHORIZATION_CODE);
		assertThat(accessTokenContext.<OAuth2AuthorizationGrantAuthenticationToken>getAuthorizationGrant()).isEqualTo(authentication);
		assertThat(accessTokenContext.getHeaders()).isNotNull();
		assertThat(accessTokenContext.getClaims()).isNotNull();
		// ID Token context
		JwtEncodingContext idTokenContext = jwtEncodingContextCaptor.getAllValues().get(1);
		assertThat(idTokenContext.getRegisteredClient()).isEqualTo(registeredClient);
		assertThat(idTokenContext.<Authentication>getPrincipal()).isEqualTo(authorization.getAttribute(Principal.class.getName()));
		assertThat(idTokenContext.getAuthorization()).isEqualTo(authorization);
		assertThat(idTokenContext.getTokenType().getValue()).isEqualTo(OidcParameterNames.ID_TOKEN);
		assertThat(idTokenContext.getAuthorizationGrantType()).isEqualTo(AuthorizationGrantType.AUTHORIZATION_CODE);
		assertThat(idTokenContext.<OAuth2AuthorizationGrantAuthenticationToken>getAuthorizationGrant()).isEqualTo(authentication);
		assertThat(idTokenContext.getHeaders()).isNotNull();
		assertThat(idTokenContext.getClaims()).isNotNull();

		verify(this.jwtEncoder, times(2)).encode(any(), any());		// Access token and ID Token

		ArgumentCaptor<OAuth2Authorization> authorizationCaptor = ArgumentCaptor.forClass(OAuth2Authorization.class);
		verify(this.authorizationService).save(authorizationCaptor.capture());
		OAuth2Authorization updatedAuthorization = authorizationCaptor.getValue();

		assertThat(accessTokenAuthentication.getRegisteredClient().getId()).isEqualTo(updatedAuthorization.getRegisteredClientId());
		assertThat(accessTokenAuthentication.getPrincipal()).isEqualTo(clientPrincipal);
		assertThat(accessTokenAuthentication.getAccessToken()).isEqualTo(updatedAuthorization.getAccessToken().getToken());
		assertThat(accessTokenAuthentication.getRefreshToken()).isNotNull();
		assertThat(accessTokenAuthentication.getRefreshToken()).isEqualTo(updatedAuthorization.getRefreshToken().getToken());
		OAuth2Authorization.Token<OAuth2AuthorizationCode> authorizationCode = updatedAuthorization.getToken(OAuth2AuthorizationCode.class);
		assertThat(authorizationCode.isInvalidated()).isTrue();
		OAuth2Authorization.Token<OidcIdToken> idToken = updatedAuthorization.getToken(OidcIdToken.class);
		assertThat(idToken).isNotNull();
		assertThat(accessTokenAuthentication.getAdditionalParameters())
				.containsExactly(entry(OidcParameterNames.ID_TOKEN, idToken.getToken().getTokenValue()));
	}

	@Test
	public void authenticateWhenTokenTimeToLiveConfiguredThenTokenExpirySet() {
		Duration accessTokenTTL = Duration.ofHours(2);
		Duration refreshTokenTTL = Duration.ofDays(1);
		RegisteredClient registeredClient = TestRegisteredClients.registeredClient()
				.tokenSettings(tokenSettings ->
						tokenSettings.accessTokenTimeToLive(accessTokenTTL).refreshTokenTimeToLive(refreshTokenTTL))
				.build();

		OAuth2Authorization authorization = TestOAuth2Authorizations.authorization(registeredClient).build();
		when(this.authorizationService.findByToken(eq(AUTHORIZATION_CODE), eq(TokenType.AUTHORIZATION_CODE)))
				.thenReturn(authorization);

		OAuth2ClientAuthenticationToken clientPrincipal = new OAuth2ClientAuthenticationToken(registeredClient);
		OAuth2AuthorizationRequest authorizationRequest = authorization.getAttribute(
				OAuth2AuthorizationRequest.class.getName());
		OAuth2AuthorizationCodeAuthenticationToken authentication =
				new OAuth2AuthorizationCodeAuthenticationToken(AUTHORIZATION_CODE, clientPrincipal, authorizationRequest.getRedirectUri(), null);

		Instant accessTokenIssuedAt = Instant.now();
		Instant accessTokenExpiresAt = accessTokenIssuedAt.plus(accessTokenTTL);
		when(this.jwtEncoder.encode(any(), any())).thenReturn(createJwt(accessTokenIssuedAt, accessTokenExpiresAt));

		OAuth2AccessTokenAuthenticationToken accessTokenAuthentication =
				(OAuth2AccessTokenAuthenticationToken) this.authenticationProvider.authenticate(authentication);

		ArgumentCaptor<OAuth2Authorization> authorizationCaptor = ArgumentCaptor.forClass(OAuth2Authorization.class);
		verify(this.authorizationService).save(authorizationCaptor.capture());
		OAuth2Authorization updatedAuthorization = authorizationCaptor.getValue();

		assertThat(accessTokenAuthentication.getAccessToken()).isEqualTo(updatedAuthorization.getAccessToken().getToken());
		Instant expectedAccessTokenExpiresAt = accessTokenAuthentication.getAccessToken().getIssuedAt().plus(accessTokenTTL);
		assertThat(accessTokenAuthentication.getAccessToken().getExpiresAt()).isBetween(
				expectedAccessTokenExpiresAt.minusSeconds(1), expectedAccessTokenExpiresAt.plusSeconds(1));

		assertThat(accessTokenAuthentication.getRefreshToken()).isEqualTo(updatedAuthorization.getRefreshToken().getToken());
		Instant expectedRefreshTokenExpiresAt = accessTokenAuthentication.getRefreshToken().getIssuedAt().plus(refreshTokenTTL);
		assertThat(accessTokenAuthentication.getRefreshToken().getExpiresAt()).isBetween(
				expectedRefreshTokenExpiresAt.minusSeconds(1), expectedRefreshTokenExpiresAt.plusSeconds(1));
	}

	@Test
	public void authenticateWhenRefreshTokenGrantNotConfiguredThenRefreshTokenNotIssued() {
		RegisteredClient registeredClient = TestRegisteredClients.registeredClient()
				.authorizationGrantTypes(grantTypes -> grantTypes.remove(AuthorizationGrantType.REFRESH_TOKEN))
				.build();

		OAuth2Authorization authorization = TestOAuth2Authorizations.authorization(registeredClient).build();
		when(this.authorizationService.findByToken(eq(AUTHORIZATION_CODE), eq(TokenType.AUTHORIZATION_CODE)))
				.thenReturn(authorization);

		OAuth2ClientAuthenticationToken clientPrincipal = new OAuth2ClientAuthenticationToken(registeredClient);
		OAuth2AuthorizationRequest authorizationRequest = authorization.getAttribute(
				OAuth2AuthorizationRequest.class.getName());
		OAuth2AuthorizationCodeAuthenticationToken authentication =
				new OAuth2AuthorizationCodeAuthenticationToken(AUTHORIZATION_CODE, clientPrincipal, authorizationRequest.getRedirectUri(), null);

		when(this.jwtEncoder.encode(any(), any())).thenReturn(createJwt());

		OAuth2AccessTokenAuthenticationToken accessTokenAuthentication =
				(OAuth2AccessTokenAuthenticationToken) this.authenticationProvider.authenticate(authentication);

		assertThat(accessTokenAuthentication.getRefreshToken()).isNull();
	}

	private static Jwt createJwt() {
		Instant issuedAt = Instant.now();
		Instant expiresAt = issuedAt.plus(1, ChronoUnit.HOURS);
		return createJwt(issuedAt, expiresAt);
	}

	private static Jwt createJwt(Instant issuedAt, Instant expiresAt) {
		return Jwt.withTokenValue("token")
				.header(JoseHeaderNames.ALG, SignatureAlgorithm.RS256.getName())
				.issuedAt(issuedAt)
				.expiresAt(expiresAt)
				.build();
	}
}