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Factorization_unit_test.rb
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Factorization_unit_test.rb
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#!/usr/bin/ruby -Wall
# ================================================================
# Please see LICENSE.txt in the same directory as this file.
# John Kerl
# kerl.john.r@gmail.com
# Copyright (c) 2011
# ================================================================
require 'Factorization.rb'
require 'test/unit'
class Factorization_unit_test < Test::Unit::TestCase
def test_insert
finfo = Factorization.new()
assert_equal("", finfo.to_s)
finfo = Factorization.new()
finfo.insert_trivial_factor(0)
assert_equal("0", finfo.to_s)
finfo = Factorization.new()
finfo.insert_trivial_factor(-1)
assert_equal("-1", finfo.to_s)
finfo = Factorization.new()
finfo.insert_trivial_factor(-1)
finfo.insert_trivial_factor(-1)
assert_equal("1", finfo.to_s)
finfo = Factorization.new()
finfo.insert_trivial_factor(-1)
finfo.insert_trivial_factor(-1)
finfo.insert_trivial_factor(-1)
assert_equal("-1", finfo.to_s)
finfo = Factorization.new()
finfo.insert_factor(2)
finfo.insert_factor(3)
finfo.insert_factor(5, 2)
assert_equal("2 3 5^2", finfo.to_s)
finfo = Factorization.new()
finfo.insert_factor(3)
finfo.insert_factor(5)
finfo.insert_factor(7)
finfo.insert_factor(2)
assert_equal("2 3 5 7", finfo.to_s)
finfo = Factorization.new()
finfo.insert_factor(2)
finfo.insert_factor(3)
finfo.insert_factor(7)
finfo.insert_factor(5)
assert_equal("2 3 5 7", finfo.to_s)
finfo = Factorization.new()
finfo.insert_factor(2)
finfo.insert_factor(3)
finfo.insert_factor(5, 2)
finfo.insert_factor(2)
finfo.insert_factor(3)
finfo.insert_factor(2)
assert_equal("2^3 3^2 5^2", finfo.to_s)
end
def test_num_factors
finfo = Factorization.new()
assert_equal(0, finfo.num_factors)
finfo = Factorization.new()
finfo.insert_factor(2)
assert_equal(1, finfo.num_factors)
finfo = Factorization.new()
finfo.insert_factor(2)
finfo.insert_factor(3)
assert_equal(2, finfo.num_factors)
finfo = Factorization.new()
finfo.insert_factor(2)
finfo.insert_factor(2)
assert_equal(2, finfo.num_factors)
finfo = Factorization.new()
finfo.insert_factor(2)
finfo.insert_factor(2)
finfo.insert_factor(3)
assert_equal(3, finfo.num_factors)
end
def test_merge
finfo1 = Factorization.new()
finfo2 = Factorization.new()
finfo1.merge(finfo2)
assert_equal("", finfo1.to_s)
finfo1 = Factorization.new()
finfo2 = Factorization.new()
finfo1.insert_factor(2, 3)
finfo1.merge(finfo2)
assert_equal("2^3", finfo1.to_s)
finfo1 = Factorization.new()
finfo2 = Factorization.new()
finfo2.insert_factor(2, 3)
finfo1.merge(finfo2)
assert_equal("2^3", finfo1.to_s)
finfo1 = Factorization.new()
finfo2 = Factorization.new()
finfo1.insert_factor(2, 3)
finfo1.insert_factor(3, 1)
finfo1.insert_factor(5, 3)
finfo2.insert_factor(7, 3)
finfo2.insert_factor(5, 1)
finfo1.merge(finfo2)
assert_equal("2^3 3 5^4 7^3", finfo1.to_s)
end
def test_exp_all
finfo = Factorization.new()
finfo.exp_all(1)
assert_equal("", finfo.to_s)
finfo = Factorization.new()
finfo.exp_all(2)
assert_equal("", finfo.to_s)
finfo = Factorization.new()
finfo.exp_all(3)
assert_equal("", finfo.to_s)
finfo = Factorization.new()
finfo.insert_factor(2)
finfo.exp_all(3)
assert_equal("2^3", finfo.to_s)
finfo = Factorization.new()
finfo.insert_factor(2,4)
finfo.exp_all(3)
assert_equal("2^12", finfo.to_s)
finfo = Factorization.new()
finfo.insert_factor(2)
finfo.insert_factor(5, 3)
finfo.exp_all(4)
assert_equal("2^4 5^12", finfo.to_s)
end
def test_divisors
finfo = Factorization.new()
finfo.insert_factor(2, 3)
finfo.insert_factor(3, 2)
assert_equal(12, finfo.num_divisors)
assert_equal([1,2,3,4,6,8,9,12,18,24,36,72], finfo.all_divisors)
end
def test_unfactor
finfo = Factorization.new()
assert_raise(RuntimeError) {finfo.unfactor}
finfo = Factorization.new()
finfo.insert_trivial_factor(0)
assert_equal(0, finfo.unfactor)
finfo = Factorization.new()
finfo.insert_trivial_factor(-1)
assert_equal(-1, finfo.unfactor)
finfo = Factorization.new()
finfo.insert_factor(2, 3)
finfo.insert_factor(3, 2)
assert_equal(72, finfo.unfactor)
finfo = Factorization.new()
finfo.insert_factor(2, 3)
finfo.insert_factor(3, 2)
finfo.insert_trivial_factor(-1)
assert_equal(-72, finfo.unfactor)
finfo = Factorization.new()
finfo.insert_factor(2, 3)
finfo.insert_factor(3, 2)
finfo.insert_trivial_factor(-1)
finfo.insert_trivial_factor(-1)
assert_equal(72, finfo.unfactor)
end
def test_maximal_proper_divisors
finfo = Factorization.new()
assert_raise(RuntimeError) {finfo.maximal_proper_divisors}
finfo = Factorization.new()
finfo.insert_trivial_factor(0)
assert_equal([], finfo.maximal_proper_divisors)
finfo = Factorization.new()
finfo.insert_trivial_factor(-1)
assert_equal([], finfo.maximal_proper_divisors)
finfo = Factorization.new()
finfo.insert_factor(2, 3)
finfo.insert_factor(3, 2)
assert_equal([24, 36], finfo.maximal_proper_divisors)
finfo = Factorization.new()
finfo.insert_factor(2, 3)
finfo.insert_factor(3, 2)
finfo.insert_trivial_factor(-1)
assert_equal([24, 36], finfo.maximal_proper_divisors)
finfo = Factorization.new()
finfo.insert_factor(2, 3)
finfo.insert_factor(3, 2)
finfo.insert_trivial_factor(-1)
finfo.insert_trivial_factor(-1)
assert_equal([24, 36], finfo.maximal_proper_divisors)
end
end