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require File.expand_path('../../../spec_helper', __FILE__)
describe "Float#-@" do
it "negates self" do
(2.221.send(:-@)).should be_close(-2.221, TOLERANCE)
-2.01.should be_close(-2.01,TOLERANCE)
-2_455_999_221.5512.should be_close(-2455999221.5512, TOLERANCE)
(--5.5).should be_close(5.5, TOLERANCE)
-8.551.send(:-@).should be_close(8.551, TOLERANCE)
end
it "negates self at Float boundaries" do
Float::MAX.send(:-@).should be_close(0.0 - Float::MAX, TOLERANCE)
Float::MIN.send(:-@).should be_close(0.0 - Float::MIN, TOLERANCE)
end
it "returns negative infinity for positive infinity" do
infinity_value.send(:-@).infinite?.should == -1
end
it "returns positive infinity for negative infinity" do
(-infinity_value).send(:-@).infinite?.should == 1
end
it "returns NaN for NaN" do
nan_value.send(:-@).nan?.should == true
end
end
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