""" A Rational class, closely followed the example by John W. Shipman of 
New Mexico Tech
http://infohost.nmt.edu/tcc/help/lang/python/examples/rational/rational.pdf

Xiannong Meng
CSCI 204 Fall 2017
"""
#================================================================
# rationaltest: A test driver for the rational.py module.
#----------------
from rational import *

def main():
    """ Test the Rational class
    """
    general_tests()
    test_comparison()
    test_negatives()

def general_tests():
    """Test basic functionality
    """
    print(" -- Test the Rational class -- ")
    third = Rational(1,3)
    print("Should be 1/3:", third)
    fifth = Rational(1,5)
    print("Should be 1/5:", fifth)
    print("Should be 8/15:", third + fifth)
    print("Should be 1/15:", third * fifth)
    print("Should be 2/15:", third - fifth)
    print("Should be 3/5:", fifth // third)

def test_comparison():
    """ Test comarisons
    """
    print(" -- Test comparisons -- ")
    one = Rational(1,3)
    two = Rational(3,9)
    three = Rational(1,2)
    print('Three Rationals one, two, three : ' \
          + str(one) + ' : ' + str(two) + ' : ' + str(three))
    print('One should equal to two (True) ', one == two)
    print('One should not equal to three (True) ', one != three)
    
    print('Three should be greater than one (True) ', three > one)
    print('One is greater than two (False) ', one > two)
    print('Three should be greather than or equal to one (True) ', three >= one)
    print('One is greater than or equal to two (True) ', one >= two)
    
    print('Three is less than one (False) ', three < one)
    print('One is less than two (False) ', one < two)
    print('Three is less than or equal to one (False) ', three <= one)
    print('One is less than or equal to two (True) ', one <= two)

def test_negatives():
    """ Test negative Rationals
    """
    print(" -- Test negatives -- ")
    one = Rational(-1,3)
    two = Rational(-3,9)
    three = Rational(1,-2)
    print('Three Rationals one, two, three : ' \
          + str(one) + ' : ' + str(two) + ' : ' + str(three))
    print('One should equal to two (True) ', one == two)
    print('One should not equal to three (True) ', one != three)
    
    print('Three should be greater than one (False) ', three > one)
    print('One is greater than two (False) ', one > two)
    print('Three should be greather than or equal to one (False) ', three >= one)
    print('One is greater than or equal to two (True) ', one >= two)
    
    print('Three is less than one (True) ', three < one)
    print('One is less than two (False) ', one < two)
    print('Three is less than or equal to one (True) ', three <= one)
    print('One is less than or equal to two (True) ', one <= two)
main()