Add test and update javadoc for CommonOAuth2Provider

Signed-off-by: Tran Ngoc Nhan <ngocnhan.tran1996@gmail.com>

config/src/main/java/org/springframework/security/config/oauth2/client/CommonOAuth2Provider.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2025 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.
@@ -16,6 +16,7 @@
 
 package org.springframework.security.config.oauth2.client;
 
+import org.springframework.security.config.Customizer;
 import org.springframework.security.config.annotation.web.builders.HttpSecurity;
 import org.springframework.security.oauth2.client.registration.ClientRegistration;
 import org.springframework.security.oauth2.client.registration.ClientRegistration.Builder;
@@ -27,7 +28,7 @@ import org.springframework.security.oauth2.core.oidc.IdTokenClaimNames;
  * Common OAuth2 Providers that can be used to create
  * {@link org.springframework.security.oauth2.client.registration.ClientRegistration.Builder
  * builders} pre-configured with sensible defaults for the
- * {@link HttpSecurity#oauth2Login()} flow.
+ * {@link HttpSecurity#oauth2Login(Customizer)} flow.
  *
  * @author Phillip Webb
  * @since 5.0

config/src/test/java/org/springframework/security/config/oauth2/client/CommonOAuth2ProviderTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2025 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.
@@ -115,6 +115,24 @@ public class CommonOAuth2ProviderTests {
 		assertThat(registration.getRegistrationId()).isEqualTo("123");
 	}
 
+	@Test
+	public void getBuilderWhenXShouldHaveXSettings() {
+		ClientRegistration registration = build(CommonOAuth2Provider.X);
+		ProviderDetails providerDetails = registration.getProviderDetails();
+		assertThat(providerDetails.getAuthorizationUri()).isEqualTo("https://x.com/i/oauth2/authorize");
+		assertThat(providerDetails.getTokenUri()).isEqualTo("https://api.x.com/2/oauth2/token");
+		assertThat(providerDetails.getUserInfoEndpoint().getUri()).isEqualTo("https://api.x.com/2/users/me");
+		assertThat(providerDetails.getUserInfoEndpoint().getUserNameAttributeName()).isEqualTo("username");
+		assertThat(providerDetails.getJwkSetUri()).isNull();
+		assertThat(registration.getClientAuthenticationMethod())
+			.isEqualTo(ClientAuthenticationMethod.CLIENT_SECRET_POST);
+		assertThat(registration.getAuthorizationGrantType()).isEqualTo(AuthorizationGrantType.AUTHORIZATION_CODE);
+		assertThat(registration.getRedirectUri()).isEqualTo(DEFAULT_REDIRECT_URL);
+		assertThat(registration.getScopes()).containsOnly("users.read", "tweet.read");
+		assertThat(registration.getClientName()).isEqualTo("X");
+		assertThat(registration.getRegistrationId()).isEqualTo("123");
+	}
+
 	private ClientRegistration build(CommonOAuth2Provider provider) {
 		return builder(provider).build();
 	}