test/-ext-/rational/test_rat.rb


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46

# frozen_string_literal: false
require 'test/unit'
require "-test-/rational"

class TestRational < Test::Unit::TestCase
  class TestGCD < Test::Unit::TestCase

    def test_gcd_normal
      x = 2*2*3*3*3
      y = 2*2*2*3*3
      gcd = 2*2*3*3
      assert_equal(gcd, x.gcd_normal(y))
    end

    def test_gcd_gmp
      x = 2*2*3*3*3
      y = 2*2*2*3*3
      gcd = 2*2*3*3
      assert_equal(gcd, x.gcd_gmp(y))
    rescue NotImplementedError
    end

    def test_gcd_gmp_brute_force
      -13.upto(13) {|x|
        -13.upto(13) {|y|
          assert_equal(x.gcd_normal(y), x.gcd_gmp(y))
        }
      }
    rescue NotImplementedError
    end
  end

  def test_rb_rational_raw
    rat = Rational.raw(1, 2)
    assert_equal(1, rat.numerator)
    assert_equal(2, rat.denominator)

    rat = Rational.raw(-1, 2)
    assert_equal(-1, rat.numerator)
    assert_equal(2, rat.denominator)

    rat = Rational.raw(1, -2)
    assert_equal(-1, rat.numerator)
    assert_equal(2, rat.denominator)
  end
end