Это не валидно

BuilderTest.php

$rangeBuilder->expects($this->any())
            ->method('buildFilter')
            ->will(
                $this->returnCallback(
                    function (FilterInterface $filter, $isNegation) use (
                        $conditionManager
                    ) {
                        /**
                         * @var \Magento\Framework\Search\Request\Filter\Range $filter
                         * @var \Magento\Framework\DB\Adapter\AdapterInterface $adapter
                         */
                        $fromCondition = '';
                        if (!is_null($filter->getFrom())) {
                            $fromCondition = $conditionManager->generateCondition(
                                $filter->getField(),
                                ($isNegation ? '<' : '>='),
                                $filter->getFrom()
                            );
                        }
                        $toCondition = '';
                        if (!is_null($filter->getTo())) {
                            $toCondition = $conditionManager->generateCondition(
                                $filter->getField(),
                                ($isNegation ? '>=' : '<'),
                                $filter->getTo()
                            );
                        }
                        $unionOperator = $isNegation ? \Zend_Db_Select::SQL_OR : \Zend_Db_Select::SQL_AND;

                        return $conditionManager->combineQueries([$fromCondition, $toCondition], $unionOperator);
                    }
                )
            );