Sha256: 5ee37e8b883a0fd44ecfe13941f7304462554a2863cc489f5b0949a52441ae61
Contents?: true
Size: 787 Bytes
Versions: 14
Compression:
Stored size: 787 Bytes
Contents
require 'test_helper'
# This tests our Fixnum calculations extension
class Fixnum::CalculationsTest < Minitest::Test
test 'Fixnums should be extended with #factorial' do
assert 1.respond_to?(:factorial)
end
test 'Fixnums#factorial should behave correctly' do
assert_equal 1, 0.factorial
assert_equal 24, 4.factorial
assert_raises(RuntimeError) { -1.factorial }
end
test 'Fixnums should be extended with #choose' do
assert 1.respond_to?(:choose)
end
test 'Fixnum#choose should behave correctly' do
pascal_row = [1, 5, 10, 10, 5, 1]
pascal_row.each_with_index do |target, index|
assert_equal target, 5.choose(index)
end
assert_raises(ArgumentError) { 10.choose(11) }
assert_raises(ArgumentError) { 10.choose(-1) }
end
end
Version data entries
14 entries across 14 versions & 1 rubygems