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from hamcrest.core.base_matcher import BaseMatcher 
import operator 
 
__author__ = "Jon Reid" 
__copyright__ = "Copyright 2011 hamcrest.org" 
__license__ = "BSD, see License.txt" 
 
 
class OrderingComparison(BaseMatcher): 
 
    def __init__(self, value, comparison_function, comparison_description): 
        self.value = value 
        self.comparison_function = comparison_function 
        self.comparison_description = comparison_description 
 
    def _matches(self, item): 
        return self.comparison_function(item, self.value) 
 
    def describe_to(self, description): 
        description.append_text('a value ')                     \ 
                   .append_text(self.comparison_description)    \ 
                   .append_text(' ')                            \ 
                   .append_description_of(self.value) 
 
 
def greater_than(value): 
    """Matches if object is greater than a given value. 
 
    :param value: The value to compare against. 
 
    """ 
    return OrderingComparison(value, operator.gt, 'greater than') 
 
 
def greater_than_or_equal_to(value): 
    """Matches if object is greater than or equal to a given value. 
 
    :param value: The value to compare against. 
 
    """ 
    return OrderingComparison(value, operator.ge, 'greater than or equal to') 
 
 
def less_than(value): 
    """Matches if object is less than a given value. 
 
    :param value: The value to compare against. 
 
    """ 
    return OrderingComparison(value, operator.lt, 'less than') 
 
 
def less_than_or_equal_to(value): 
    """Matches if object is less than or equal to a given value. 
 
    :param value: The value to compare against. 
 
    """ 
    return OrderingComparison(value, operator.le, 'less than or equal to')