Fixes for unit tests being broken.

lib/Doctrine/Export.php

@@ -1081,12 +1081,15 @@ class Doctrine_Export extends Doctrine_Connection_Module
 
             $table = $plugin->getOption('pluginTable');
             
+            // Make sure plugin has a valid table
+            if ($table instanceof Doctrine_Table) {
                 $data = $table->getExportableFormat();
 
                 $query = $this->conn->export->createTableSql($data['tableName'], $data['columns'], $data['options']);
 
                 $sql = array_merge($sql, (array) $query);
             }
+        }
 
         return $sql;
     }

playground/index.php

@@ -24,6 +24,4 @@ if ($action == 'server') {
     $query = new Doctrine_Resource_Query();
     
     $users = $query->from('User u, u.Phonenumber p, u.Address a, u.Book b, b.Author a')->execute();
-    
-    print_r($users);
 }
\ No newline at end of file

tests/schema.yml

 ---
-Test:
-  inheritance:
-    extends: User
-    keyField: otype
-    keyValue: 1
 Account: 
   tableName: account
   className: Account