Index: tests/Zend/Db/Adapter/TestCommon.php
===================================================================
--- tests/Zend/Db/Adapter/TestCommon.php	(revision 14591)
+++ tests/Zend/Db/Adapter/TestCommon.php	(working copy)
@@ -280,7 +280,7 @@
         $ids = $this->_db->fetchCol("SELECT $product_id FROM $products ORDER BY $product_id");
         $this->assertEquals(array(2, 3), $ids);
     }
-    
+
     /**
      * @group ZF-1726
      */
@@ -916,6 +916,51 @@
     }
 
     /**
+     * Ensures that exec() throws an exception when given a bogus query
+     *
+     * @return void
+     */
+    public function testAdapterExecBogus()
+    {
+        try {
+            $this->_db->exec('Bogus query');
+            $this->fail('Expected exception not thrown');
+        } catch (Zend_Exception $e) {
+            $this->assertType('integer', $e,
+                'Expecting integer, got '.get_class($e));
+        }
+    }
+
+    /**
+     * Ensures that exec() throws an exception when given a bogus table
+     *
+     * @return void
+     */
+    public function testAdapterExecBogusTable()
+    {
+        try {
+            $this->_db->exec('DELETE FROM BogusTable');
+            $this->fail('Expected exception not thrown');
+        } catch (Zend_Exception $e) {
+            $this->assertType('integer', $e,
+                'Expecting integer, got '.get_class($e));
+        }
+    }
+
+    /**
+     * Ensures that exec() provides expected behavior when modifying no rows
+     *
+     * @return void
+     */
+    public function testAdapterExecModifiedNone()
+    {
+        $affected = $this->_db->exec('DELETE FROM ' . $this->_db->quoteIdentifier('zfbugs') . ' WHERE 1 = -1');
+
+        $this->assertEquals(0, $affected,
+            "Expected exec() to return zero affected rows; got $count");
+    }
+
+    /**
      * Ensures that query() throws an exception when given a bogus query
      *
      * @return void
@@ -1729,7 +1774,7 @@
         $value = $this->_db->fetchOne("SELECT $bug_status FROM $bugs WHERE $bug_id = 1");
         $this->assertEquals('ARRAY', $value);
     }
-    
+
     /**
      * @group ZF-1726
      */
@@ -1962,7 +2007,7 @@
         $db = unserialize(serialize($db));
         $this->assertTrue($db->isConnected());
     }
-    
+
     /**
      * @group ZF-1541
      */
@@ -1975,7 +2020,7 @@
         $params['options'] = array(
             'charset' => 'utf8'
         );
-        
+
         $db = Zend_Db::factory($this->getDriver(), $params);
 
         /**
@@ -1985,7 +2030,7 @@
          *
          * $db->query('SET NAMES utf8');
          */
-    
+
          // create a new util object, with the new db adapter
         $driver = $this->getDriver();
         $utilClass = "Zend_Db_TestUtil_{$driver}";