Add Timeout to Ldap Test

- The test intentionally points to a non-existent LDAP server; on
some machines, this will hang indefinitely without a specified
timeout.

Issue gh-2884

Author: jzheaux

ldap/src/test/java/org/springframework/security/ldap/authentication/ad/ActiveDirectoryLdapAuthenticationProviderTests.java

@@ -15,6 +15,18 @@
  */
 package org.springframework.security.ldap.authentication.ad;
 
+import java.util.Collections;
+import java.util.Hashtable;
+import javax.naming.AuthenticationException;
+import javax.naming.CommunicationException;
+import javax.naming.Name;
+import javax.naming.NameNotFoundException;
+import javax.naming.NamingEnumeration;
+import javax.naming.NamingException;
+import javax.naming.directory.DirContext;
+import javax.naming.directory.SearchControls;
+import javax.naming.directory.SearchResult;
+
 import org.apache.directory.shared.ldap.util.EmptyEnumeration;
 import org.hamcrest.BaseMatcher;
 import org.hamcrest.CoreMatchers;
@@ -25,6 +37,7 @@
 import org.junit.Test;
 import org.junit.rules.ExpectedException;
 import org.mockito.ArgumentCaptor;
+
 import org.springframework.dao.IncorrectResultSizeDataAccessException;
 import org.springframework.ldap.core.DirContextAdapter;
 import org.springframework.ldap.core.DistinguishedName;
@@ -37,21 +50,13 @@
 import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
 import org.springframework.security.core.Authentication;
 
-import javax.naming.AuthenticationException;
-import javax.naming.CommunicationException;
-import javax.naming.Name;
-import javax.naming.NameNotFoundException;
-import javax.naming.NamingEnumeration;
-import javax.naming.NamingException;
-import javax.naming.directory.DirContext;
-import javax.naming.directory.SearchControls;
-import javax.naming.directory.SearchResult;
-
-import java.util.Hashtable;
-
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.fail;
-import static org.mockito.Mockito.*;
+import static org.mockito.Mockito.any;
+import static org.mockito.Mockito.eq;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
 import static org.springframework.security.ldap.authentication.ad.ActiveDirectoryLdapAuthenticationProvider.ContextFactory;
 
 /**
@@ -398,6 +403,8 @@ public void nonAuthenticationExceptionIsConvertedToSpringLdapException() throws
 	public void connectionExceptionIsWrappedInInternalException() throws Exception {
 		ActiveDirectoryLdapAuthenticationProvider noneReachableProvider = new ActiveDirectoryLdapAuthenticationProvider(
 				"mydomain.eu", NON_EXISTING_LDAP_PROVIDER, "dc=ad,dc=eu,dc=mydomain");
+		noneReachableProvider.setContextEnvironmentProperties(
+				Collections.singletonMap("com.sun.jndi.ldap.connect.timeout", "5"));
 		noneReachableProvider.doAuthentication(joe);
 	}