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Contents
require File.dirname(File.join(__rhoGetCurrentDir(), __FILE__)) + '/../../spec_helper'
describe "Bignum#>>" do
before(:each) do
@bignum = bignum_value(90812)
end
it "returns self shifted the given amount of bits to the right" do
(@bignum >> 1).should == 4611686018427433310
(@bignum >> 3).should == 1152921504606858327
end
it "performs a left-shift if given a negative value" do
(@bignum >> -1).should == (@bignum << 1)
(@bignum >> -3).should == (@bignum << 3)
end
it "tries to convert the given argument to an Integer using to_int" do
(@bignum >> 1.3).should == 4611686018427433310
(obj = mock('1')).should_receive(:to_int).and_return(1)
(@bignum >> obj).should == 4611686018427433310
end
it "raises a TypeError when the given argument can't be converted to Integer" do
obj = mock('asdf')
lambda { @bignum >> obj }.should raise_error(TypeError)
obj.should_receive(:to_int).and_return("asdf")
lambda { @bignum >> obj }.should raise_error(TypeError)
end
it "returns 0 when the given argument is a Bignum and self is positive" do
(@bignum >> bignum_value).should == 0
obj = mock("Converted to Integer")
obj.should_receive(:to_int).and_return(bignum_value)
(@bignum >> obj).should == 0
end
it "returns -1 when the given argument is a Bignum and self is negative" do
(-@bignum >> bignum_value).should == -1
obj = mock("Converted to Integer")
obj.should_receive(:to_int).and_return(bignum_value)
(-@bignum >> obj).should == -1
end
end
Version data entries
83 entries across 83 versions & 1 rubygems