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33 lines
945 B
Ruby
33 lines
945 B
Ruby
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require File.expand_path('../../../spec_helper', __FILE__)
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require 'bigdecimal'
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describe "BigDecimal#infinite?" do
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it "returns 1 if self is Infinity" do
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BigDecimal("Infinity").infinite?.should == 1
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end
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it "returns -1 if self is -Infinity" do
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BigDecimal("-Infinity").infinite?.should == -1
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end
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it "returns not true otherwise" do
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e2_plus = BigDecimal("2E40001")
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e3_minus = BigDecimal("3E-20001")
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really_small_zero = BigDecimal("0E-200000000")
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really_big_zero = BigDecimal("0E200000000000")
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e3_minus.infinite?.should == nil
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e2_plus.infinite?.should == nil
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really_small_zero.infinite?.should == nil
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really_big_zero.infinite?.should == nil
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BigDecimal("0.000000000000000000000000").infinite?.should == nil
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end
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it "returns not true if self is NaN" do
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# NaN is a special value which is neither finite nor infinite.
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nan = BigDecimal("NaN")
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nan.infinite?.should == nil
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end
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end
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