Add access method that gives access to the listening port for the embedded LDAP server and thus resolves #2

Author: zapodot

src/main/java/org/zapodot/junit/ldap/EmbeddedLdapRule.java

@@ -47,4 +47,17 @@ public interface EmbeddedLdapRule extends TestRule {
      * @throws NamingException if a LDAP failure happens during DirContext creation
      */
     DirContext dirContext() throws NamingException;
+
+    /**
+     * Gives access to the listening port for the currently running embedded LDAP server.
+     * This will make it easier to use other integration
+     *
+     * Note: the listening address is always <em>0.0.0.0</em> which means the server will listen to all available NIC-s.
+     * This may change in a future release (should ideally only be listening on the loopback device)
+     *
+     * @return the port number that the embedded server is listening to
+     */
+    int embeddedServerPort();
+
+
 }

src/main/java/org/zapodot/junit/ldap/internal/EmbeddedLdapRuleImpl.java

@@ -94,6 +94,15 @@ public DirContext dirContext() throws NamingException {
         return ContextProxyFactory.asDelegatingDirContext(createOrGetInitialDirContext());
     }
 
+    @Override
+    public int embeddedServerPort() {
+        if(isStarted) {
+            return inMemoryDirectoryServer.getListenPort();
+        } else {
+            throw new IllegalStateException("The embedded server must be started prior to accessing the listening port");
+        }
+    }
+
     private InitialDirContext createOrGetInitialDirContext() throws NamingException {
         if (isStarted) {
             if (initialDirContext == null) {
@@ -111,7 +120,7 @@ private Hashtable<String, String> createLdapEnvironment() {
         environment.put(LdapContext.CONTROL_FACTORIES, DefaultResponseControlFactory.class.getName());
         environment.put(Context.PROVIDER_URL, String.format("ldap://%s:%s",
                                                             "localhost",
-                                                            inMemoryDirectoryServer.getListenPort()));
+                                                            embeddedServerPort()));
         environment.put(Context.INITIAL_CONTEXT_FACTORY, LdapCtxFactory.class.getName());
         if (authenticationConfiguration != null) {
             environment.putAll(authenticationConfiguration.toAuthenticationEnvironment());

src/test/java/org/zapodot/junit/ldap/EmbeddedLdapRuleTest.java

@@ -9,11 +9,9 @@
 import javax.naming.NamingEnumeration;
 import javax.naming.directory.DirContext;
 import javax.naming.directory.SearchControls;
-
 import java.util.Arrays;
 
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.*;
 
 public class EmbeddedLdapRuleTest {
 
@@ -48,7 +46,9 @@ public void testRawLdapConnection() throws Exception {
             ldapConnection.close();
         }
         ldapConnection = embeddedLdapRule.unsharedLdapConnection();
-        final SearchResultEntry entry = ldapConnection.searchForEntry(new SearchRequest(dn, SearchScope.BASE, "(objectClass=person)"));
+        final SearchResultEntry entry = ldapConnection.searchForEntry(new SearchRequest(dn,
+                                                                                        SearchScope.BASE,
+                                                                                        "(objectClass=person)"));
         assertNotNull(entry);
     }
 
@@ -76,4 +76,17 @@ public void testContextClose() throws Exception {
         assertNotNull(context.getNameInNamespace());
 
     }
+
+    @Test
+    public void testEmbeddedServerPort() throws Exception {
+        assertTrue(embeddedLdapRule.embeddedServerPort() > 0);
+
+    }
+
+    @Test(expected = IllegalStateException.class)
+    public void testNoPortAssignedYet() throws Exception {
+        final EmbeddedLdapRule embeddedLdapRule = new EmbeddedLdapRuleBuilder().build();
+        embeddedLdapRule.embeddedServerPort();
+
+    }
 }