How to Autowire LdapRepository in Spring? - spring

Question

I am attempting to use Spring's auto-configuration to spin up an embedded LDAP server and access it using spring-data-ldap. However, the autowired fields, repository (an instance of LdapRepository) and the ldapTemplate (an instance of the LdapTemplate) are null.
For example,
spring.ldap.model.UserTest > testSaveUser FAILED
java.lang.NullPointerException at UserTest.java:32
What am I missing?
build.gradle
plugins {
id 'org.springframework.boot' version '2.0.6.RELEASE' apply false
}
apply plugin: 'io.spring.dependency-management'
apply plugin: 'java'
repositories {
jcenter()
}
dependencyManagement {
imports {
mavenBom org.springframework.boot.gradle.plugin.SpringBootPlugin.BOM_COORDINATES
}
}
dependencies {
compile 'org.springframework.data:spring-data-ldap'
compile 'com.unboundid:unboundid-ldapsdk'
testCompile 'org.springframework.boot:spring-boot-starter-data-ldap'
testCompile 'org.springframework.boot:spring-boot-starter-test'
}
sourceCompatibility = '1.8'
[compileJava, compileTestJava]*.options*.encoding = 'UTF-8'
Under src/main/java/spring/ldap/model:
Config.java
package spring.ldap.model;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.ldap.repository.config.EnableLdapRepositories;
#Configuration
#EnableLdapRepositories
public class Config { }
User.java
package spring.ldap.model;
import javax.naming.Name;
import org.springframework.ldap.odm.annotations.Attribute;
import org.springframework.ldap.odm.annotations.DnAttribute;
import org.springframework.ldap.odm.annotations.Entry;
import org.springframework.ldap.odm.annotations.Id;
#Entry(objectClasses = { "person", "top" }, base="dc=spring,dc=ldap,dc=model" )
public class User {
#Id private Name dn;
#Attribute(name = "cn") #DnAttribute(value = "cn", index = 0) private String userName;
#Attribute(name = "sn") private String fullName;
public Name getDn() { return dn; }
public void setDn(Name dn) { this.dn = dn; }
public String getUsername() { return userName; }
public void setUsername(String userName) { this.userName = userName; }
public String getFullName() { return fullName; }
public void setFullName(String fullName) { this.fullName = fullName; }
}
UserRepository.java
package spring.ldap.model;
import org.springframework.data.ldap.repository.LdapRepository;
import org.springframework.stereotype.Repository;
#Repository
public interface UserRepository extends LdapRepository<User> { }
Under src/test/java/spring/ldap/model:
UserTest.java
package spring.ldap.model;
import static org.junit.Assert.assertNotNull;
import javax.naming.Name;
import org.junit.Before;
import org.junit.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.autoconfigure.data.ldap.DataLdapTest;
import org.springframework.ldap.core.DirContextAdapter;
import org.springframework.ldap.core.LdapTemplate;
import org.springframework.ldap.support.LdapNameBuilder;
import org.springframework.test.context.ContextConfiguration;
#DataLdapTest()
#ContextConfiguration(classes = Config.class)
public class UserTest {
#Autowired UserRepository repository;
#Autowired LdapTemplate ldapTemplate;
#Before
public void SetUp() {
LdapNameBuilder builder = LdapNameBuilder.newInstance();
builder.add("dc", "model");
builder.add("dc", "ldap");
builder.add("dc", "spring");
Name dn = builder.build();
DirContextAdapter context = new DirContextAdapter(dn);
context.setAttributeValues("objectclass", new String[] { "top", "domain", "extensibleObject" });
context.setAttributeValue("dc", "spring");
ldapTemplate.bind(context);
}
#Test public void testSaveUser() {
User user = new User();
user.setUsername("ncornish");
user.setFullName("Nicholas Cornish");
repository.save(user);
assertNotNull("Id was not generated!", user.getDn());
}
}
Under src/test/resources:
application.properties
spring.ldap.embedded.base-dn=dc=spring,dc=ldap,dc=model
spring.ldap.embedded.credential.username=uid=admin
spring.ldap.embedded.credential.password=secret

Answer 1

Must put these annotations on test class context:
#RunWith(SpringRunner.class)
#SpringBootTest(classes = { UserRepository.class, LdapTemplate.class })
#ContextConfiguration(classes = Config.class)
#EnableConfigurationProperties
Kind regards.

Answer 2

Thanks JB Nezit, your comment
Your test doesn't run into a Spring context, since it's not annotated
with #RunWith(SpringRunner.class). So nothing will ever autowire
anything inside it.
resolves the issue. ie. add the following to the test class
#RunWith(SpringRunner.class)