public function testIndexDefaultNames()
 {
     $blueprint = new Blueprint('users');
     $blueprint->unique(array('foo', 'bar'));
     $commands = $blueprint->getCommands();
     $this->assertEquals('users_foo_bar_unique', $commands[0]->index);
     $blueprint = new Blueprint('users');
     $blueprint->index('foo');
     $commands = $blueprint->getCommands();
     $this->assertEquals('users_foo_index', $commands[0]->index);
 }