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29 lines
823 B
Ruby
29 lines
823 B
Ruby
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require File.expand_path('../../../spec_helper', __FILE__)
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describe "Integer#-@" do
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context "fixnum" do
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it "returns self as a negative value" do
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2.send(:-@).should == -2
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-2.should == -2
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-268435455.should == -268435455
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(--5).should == 5
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-8.send(:-@).should == 8
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end
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it "negates self at Fixnum/Bignum boundaries" do
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fixnum_max.send(:-@).should == (0 - fixnum_max)
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fixnum_min.send(:-@).should == (0 - fixnum_min)
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end
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end
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context "bignum" do
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it "returns self as a negative value" do
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bignum_value.send(:-@).should == -9223372036854775808
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(-bignum_value).send(:-@).should == 9223372036854775808
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bignum_value(921).send(:-@).should == -9223372036854776729
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(-bignum_value(921).send(:-@)).should == 9223372036854776729
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end
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end
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end
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