public function testZeroArraySourceNotOverwrittenByEmptyString()
{
$source = array(0 => 'zero');
$field = new DropdownField('Field', null, $source);
$field->setEmptyString('select...');
$this->assertEquals($field->getSource(), array(0 => 'zero'));
$options = $this->findOptionElements($field->Field());
$this->assertEquals(2, count($options), 'Two options exist in the markup, one for the source, one for empty');
}
