fallthrough scheme tests, and turns out underscores are a no go :(

lib/Doctrine/DBAL/DriverManager.php

@@ -57,7 +57,6 @@ final class DriverManager
     private static $_driverSchemeAliases = array(
         'db2'        => 'ibm_db2',
         'mssql'      => 'pdo_sqlsrv',
-        'pdo_mssql'  => 'pdo_sqlsrv',
         'mysql'      => 'pdo_mysql',
         'mysql2'     => 'pdo_mysql', // Amazon RDS, for some weird reason
         'postgres'   => 'pdo_pgsql',

tests/Doctrine/Tests/DBAL/DriverManagerTest.php

@@ -175,6 +175,10 @@ class DriverManagerTest extends \Doctrine\Tests\DbalTestCase
                 'sqlite:///:memory:',
                 array('dbname' => ':memory:', 'driver' => 'Doctrine\DBAL\Driver\PDOSqlite\Driver'),
             ),
+            'sqlite memory with host' => array(
+                'sqlite://localhost/:memory:',
+                array('dbname' => ':memory:', 'driver' => 'Doctrine\DBAL\Driver\PDOSqlite\Driver'),
+            ),
             'params parsed from URL override individual params' => array(
                 array('url' => 'mysql://foo:bar@localhost/baz', 'password' => 'lulz'),
                 array('user' => 'foo', 'password' => 'bar', 'host' => 'localhost', 'dbname' => 'baz', 'driver' => 'Doctrine\DBAL\Driver\PDOMySQL\Driver'),
@@ -187,6 +191,14 @@ class DriverManagerTest extends \Doctrine\Tests\DbalTestCase
                 'url' => 'mysql://foo:bar@localhost/dbname?charset=UTF-8',
                 array('charset' => 'UTF-8'),
             ),
+            'simple URL with fallthrough scheme not defined in map' => array(
+                'sqlsrv://foo:bar@localhost/baz',
+                array('user' => 'foo', 'password' => 'bar', 'host' => 'localhost', 'dbname' => 'baz', 'driver' => 'Doctrine\DBAL\Driver\SQLSrv\Driver'),
+            ),
+            'simple URL with fallthrough scheme containing underscores fails' => array(
+                'drizzle_pdo_mysql://foo:bar@localhost/baz',
+                false,
+            ),
         );
     }
 }
\ No newline at end of file