cities = [(281, 468), (515, 643), (738, 88), (530, 120), (410, 754) ]


import support
import random

def test_d() :

    print( "testing d()" )
    print()

    x = cities.copy()

    a = 2
    b = 4

    print( "cities:", x )
    print( "a:", a )
    print( "b:", b )

    result = support.d( x, a, b )

    if ( result != None ) :
        result = round( result, 1 )
    
    print()

    print( "d( cities, a, b ): ", result )

    print( "\n--------------------------------------\n" )

def test_swap() :

    print( "testing swap()" )
    print()
    
    n = len( cities )

    random.seed( 1112 )

    tour = list( range( 0, n ) )

    random.shuffle( tour )

    i1 = 2
    i2 = 4

    print( "i1:", i1 )
    print( "i2:", i2 )

    print( "tour before swapping at indices i1 and i2:", tour )

    support.swap( tour, i1, i2 )

    print( "tour after  swapping at indices i1 and i2:", tour )

    print( "\n--------------------------------------\n" )

def test_cost() :

    print( "testing cost()" )

    print()

    tour = [4, 2, 0, 3, 1]

    print( "cities:", cities )
    print( "tour:", tour )
    print()

    x = cities.copy()
    y = tour.copy()

    result = support.cost( x, y )
    
    if ( result != None ) :
        result = round( result, 1 )
    
    print( "cost( cities, tour ): ", result )

if ( __name__ == "__main__" ) :
    import test_support

    test_support.test_d()
    test_support.test_swap()
    test_support.test_cost()