protected function getExpressionValueSerialization(SortExpression $expression)
{
if ($expression instanceof PropertyValueSortExpression) {
return array('property' => $expression->getPropertyId()->toArray());
}
throw new UnsupportedObjectException($expression);
}
/**
* @dataProvider instanceProvider
*
* @since 1.0
*
* @param SortExpression $expression
*/
public function testReturnValueOfGetDirection(SortExpression $expression)
{
$direction = $expression->getDirection();
$this->assertInternalType('string', $direction);
$this->assertTrue(in_array($direction, array(SortExpression::DIRECTION_ASCENDING, SortExpression::DIRECTION_DESCENDING)), 'Sort direction is one of the known values');
}
