add unittest for nested functions in columns in Zend_Db_Select

tests/Zend/Db/Select/StaticTest.php

@@ -854,6 +854,26 @@ class Zend_Db_Select_StaticTest extends Zend_Db_Select_TestCommon
         $this->assertEquals('SELECT "p"."MD5(1); drop table products; -- )" FROM "products" AS "p"', $select->assemble());
     }
 
+    public function testIfInColumn()
+    {
+        $select = $this->_db->select();
+        $select->from('table1', '*');
+        $select->join(array('table2'),
+                      'table1.id = table2.id',
+                      array('bar' => 'IF(table2.id IS NOT NULL, 1, 0)'));
+        $this->assertEquals("SELECT \"table1\".*, IF(table2.id IS NOT NULL, 1, 0) AS \"bar\" FROM \"table1\"\n INNER JOIN \"table2\" ON table1.id = table2.id", $select->assemble());
+    }
+
+    public function testNestedIfInColumn()
+    {
+        $select = $this->_db->select();
+        $select->from('table1', '*');
+        $select->join(array('table2'),
+            'table1.id = table2.id',
+            array('bar' => 'IF(table2.id IS NOT NULL, IF(table2.id2 IS NOT NULL, 1, 2), 0)'));
+        $this->assertEquals("SELECT \"table1\".*, IF(table2.id IS NOT NULL, IF(table2.id2 IS NOT NULL, 1, 2), 0) AS \"bar\" FROM \"table1\"\n INNER JOIN \"table2\" ON table1.id = table2.id", $select->assemble());
+    }
+
     /**
      * @group ZF-378
      */