Populate base for embedded LDAPContextSource

Fixes gh-23030

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/ldap/embedded/EmbeddedLdapAutoConfiguration.java

@@ -205,6 +205,7 @@ public class EmbeddedLdapAutoConfiguration {
 		LdapContextSource ldapContextSource(Environment environment, LdapProperties properties,
 				EmbeddedLdapProperties embeddedProperties) {
 			LdapContextSource source = new LdapContextSource();
+			source.setBase(properties.getBase());
 			if (embeddedProperties.getCredential().isAvailable()) {
 				source.setUserDn(embeddedProperties.getCredential().getUsername());
 				source.setPassword(embeddedProperties.getCredential().getPassword());

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/ldap/embedded/EmbeddedLdapAutoConfigurationTests.java

@@ -178,6 +178,15 @@ class EmbeddedLdapAutoConfigurationTests {
 				});
 	}
 
+	@Test
+	void ldapContextIsCreatedWithBase() {
+		this.contextRunner.withPropertyValues("spring.ldap.embedded.base-dn:dc=spring,dc=org",
+				"spring.ldap.base:dc=spring,dc=org").run((context) -> {
+					LdapContextSource ldapContextSource = context.getBean(LdapContextSource.class);
+					assertThat(ldapContextSource.getBaseLdapPathAsString()).isEqualTo("dc=spring,dc=org");
+				});
+	}
+
 	@Configuration(proxyBeanMethods = false)
 	static class LdapClientConfiguration {