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* For easier modifications of ruby/spec by MRI developers. * .gitignore: track changes under spec. * spec/mspec, spec/rubyspec: add in-tree mspec and ruby/spec. These files can therefore be updated like any other file in MRI. Instructions are provided in spec/README. [Feature #13156] [ruby-core:79246] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58595 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
21 lines
715 B
Ruby
21 lines
715 B
Ruby
require File.expand_path('../../../../spec_helper', __FILE__)
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ruby_version_is ''...'2.5' do
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require 'mathn'
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describe "Integer#prime_division" do
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it "performs a prime factorization of a positive integer" do
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100.prime_division.should == [[2, 2], [5, 2]]
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end
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# Proper handling of negative integers has been added to MRI trunk
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# in revision 24091. Prior to that, all versions of MRI returned nonsense.
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it "performs a prime factorization of a negative integer" do
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-26.prime_division.should == [[-1, 1], [2, 1], [13, 1]]
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end
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it "raises a ZeroDivisionError when is called on zero" do
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lambda { 0.prime_division }.should raise_error(ZeroDivisionError)
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end
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end
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end
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