/**
* Return counted expression accorded parsed string
*
* @param string $expr
* @param Varien_Data_Collection $collection
* @return float|int
*/
protected function _countExpr($expr, $collection)
{
$parsedExpression = $this->_parser->parseExpression($expr);
$result = $tmpResult = 0;
$firstOperand = $secondOperand = null;
foreach ($parsedExpression as $operand) {
if ($this->_parser->isOperation($operand)) {
$this->_checkOperandsSet($firstOperand, $secondOperand, $tmpResult, $result);
$result = $this->_operate($firstOperand, $secondOperand, $operand, $tmpResult, $result);
$firstOperand = $secondOperand = null;
} else {
if (null === $firstOperand) {
$firstOperand = $this->_checkOperand($operand, $collection);
} elseif (null === $secondOperand) {
$secondOperand = $this->_checkOperand($operand, $collection);
}
}
}
return $result;
}
/**
* @param $operation
* @param $expected
* @dataProvider isOperationDataProvider
*/
public function testIsOperation($operation, $expected)
{
$this->assertEquals($expected, $this->_model->isOperation($operation));
}
