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