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401b64c4e8
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62656 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
51 lines
1.8 KiB
Ruby
51 lines
1.8 KiB
Ruby
require_relative '../../spec_helper'
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require_relative 'fixtures/classes'
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require_relative 'shared/exponent'
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ruby_version_is "2.5" do
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describe "Integer#pow" do
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context "one argument is passed" do
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it_behaves_like :integer_exponent, :pow
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end
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context "two arguments are passed" do
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it "returns modulo of self raised to the given power" do
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2.pow(5, 12).should == 8
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2.pow(6, 13).should == 12
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2.pow(7, 14).should == 2
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2.pow(8, 15).should == 1
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end
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ruby_bug '#13669', '2.5'...'2.5.1' do
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it "works well with bignums" do
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2.pow(61, 5843009213693951).should eql 3697379018277258
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2.pow(62, 5843009213693952).should eql 1551748822859776
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2.pow(63, 5843009213693953).should eql 3103497645717974
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2.pow(64, 5843009213693954).should eql 363986077738838
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end
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end
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it "handles sign like #divmod does" do
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2.pow(5, 12).should == 8
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2.pow(5, -12).should == -4
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-2.pow(5, 12).should == 4
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-2.pow(5, -12).should == -8
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end
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it "ensures all arguments are integers" do
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-> { 2.pow(5, 12.0) }.should raise_error(TypeError, /2nd argument not allowed unless all arguments are integers/)
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-> { 2.pow(5, Rational(12, 1)) }.should raise_error(TypeError, /2nd argument not allowed unless all arguments are integers/)
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end
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it "raises TypeError for non-numeric value" do
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-> { 2.pow(5, "12") }.should raise_error(TypeError)
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-> { 2.pow(5, []) }.should raise_error(TypeError)
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-> { 2.pow(5, nil) }.should raise_error(TypeError)
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end
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it "raises a ZeroDivisionError when the given argument is 0" do
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-> { 2.pow(5, 0) }.should raise_error(ZeroDivisionError)
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end
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end
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end
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end
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