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ruby--ruby/spec/ruby/library/prime/integer/prime_division_spec.rb
eregon 1d15d5f080 Move spec/rubyspec to spec/ruby for consistency
* Other ruby implementations use the spec/ruby directory.
  [Misc #13792] [ruby-core:82287]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59979 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2017-09-20 20:18:52 +00:00

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Ruby

require File.expand_path('../../../../spec_helper', __FILE__)
require 'prime'
describe "Integer#prime_division" do
it "returns an array of a prime factor and a corresponding exponent" do
(2*3*5*7*11*13*17).prime_division.should ==
[[2,1], [3,1], [5,1], [7,1], [11,1], [13,1], [17,1]]
end
it "returns an empty array for 1" do
1.prime_division.should == []
end
it "returns an empty array for -1" do
-1.prime_division.should == [[-1, 1]]
end
it "raises ZeroDivisionError for 0" do
lambda { 0.prime_division }.should raise_error(ZeroDivisionError)
end
end