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require_relative '../../spec_helper'
describe "Integer#size" do
platform_is wordsize: 32 do
it "returns the number of bytes in the machine representation of self" do
-1.size.should == 4
0.size.should == 4
4091.size.should == 4
end
end
platform_is wordsize: 64 do
it "returns the number of bytes in the machine representation of self" do
-1.size.should == 8
0.size.should == 8
4091.size.should == 8
end
end
context "bignum" do
it "returns the number of bytes required to hold the unsigned bignum data" do
# that is, n such that 256 * n <= val.abs < 256 * (n+1)
(256**7).size.should == 8
(256**8).size.should == 9
(256**9).size.should == 10
(256**10).size.should == 11
(256**10-1).size.should == 10
(256**11).size.should == 12
(256**12).size.should == 13
(256**20-1).size.should == 20
(256**40-1).size.should == 40
end
end
end
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