persistent must be cast to a boolean

Otherwise PDO doens't respect the value - allegedly

Author: AD7six

src/Wrapper/CakePHP/V2/DbDsn.php

@@ -63,6 +63,18 @@ public function getDatasource()
         return 'Database/' . ucfirst($engine);
     }
 
+/**
+ * getPersistent
+ *
+ * Cast the string value in the dsn to a bool
+ *
+ * @return bool
+ */
+    public function getPersistent()
+    {
+        return (bool)$this->dsn->persistent;
+    }
+
 /**
  * parse a url as a database dsn
  *

tests/TestCase/Wrapper/CakePHP/V2/DbDsnTest.php

@@ -30,6 +30,42 @@ public function testDefaults($url, $expected)
         $this->assertSame($url, $return, 'The dsn should parse back to the same url');
     }
 
+/**
+ * testPersistentCasting
+ *
+ * Persistent need to be a bool otherwise PDO may ignore the value
+ *
+ * @return void
+ */
+    public function testPersistentCasting() {
+        $string = "mysql://root:password@localhost/dbname?persistent=0";
+        $expected = [
+            'datasource' => 'Database/Mysql',
+            'host' => 'localhost',
+            'port' => 3306,
+            'login' => 'root',
+            'password' => 'password',
+            'database' => 'dbname',
+            'persistent' => false
+        ];
+        $result = DbDsn::parse($string);
+        $this->assertSame($expected, $result);
+
+        $string = "mysql://root:password@localhost/dbname?persistent=1";
+        $expected = [
+            'datasource' => 'Database/Mysql',
+            'host' => 'localhost',
+            'port' => 3306,
+            'login' => 'root',
+            'password' => 'password',
+            'database' => 'dbname',
+            'persistent' => true
+        ];
+        $result = DbDsn::parse($string);
+        $this->assertSame($expected, $result);
+
+    }
+
 /**
  * defaultsProvider
  *