1..6
ok 1 - __construct() throws a RuntimeException if you don't pass a from_date and a to_date option
# ->clean()
ok 2 - ->clean() returns the from and to values
ok 3 - ->clean() throws a sfValidatorError if the from date is after the to date
ok 4 - ->clean() throws a sfValidatorError
# Custom field names options
ok 5 - ->clean() take into account custom fields
ok 6 - ->clean() returns the from and to values for custom field names
# Looks like everything went fine.