public function testCanForceFieldToImage()
{
$this->former->withRules(array('foo' => 'image'));
$input = $this->former->file('foo')->__toString();
$matcher = $this->matchField(array('accept' => 'image/jpeg,image/png,image/gif,image/bmp'), 'file');
$this->assertControlGroup($input);
$this->assertHTML($matcher, $input);
}