public function testIsValueChanged()
{
// load the model
$collection = new Mage_Core_Model_Resource_Config_Data_Collection();
$collection->addFieldToFilter('path', self::SAMPLE_CONFIG_PATH)->addFieldToFilter('scope_id', 0)->addFieldToFilter('scope', 'default');
foreach ($collection as $configData) {
$this->_model = $configData;
break;
}
$this->assertNotEmpty($this->_model->getId());
// assert
$this->assertFalse($this->_model->isValueChanged());
$this->_model->setValue(uniqid());
$this->assertTrue($this->_model->isValueChanged());
}
