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* For easier modifications of ruby/spec by MRI developers. * .gitignore: track changes under spec. * spec/mspec, spec/rubyspec: add in-tree mspec and ruby/spec. These files can therefore be updated like any other file in MRI. Instructions are provided in spec/README. [Feature #13156] [ruby-core:79246] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58595 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
47 lines
1.3 KiB
Ruby
47 lines
1.3 KiB
Ruby
require File.expand_path('../../../spec_helper', __FILE__)
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require 'bigdecimal'
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describe "BigDecimal#+" do
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before :each do
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@one = BigDecimal("1")
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@zero = BigDecimal("0")
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@two = BigDecimal("2")
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@three = BigDecimal("3")
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@ten = BigDecimal("10")
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@eleven = BigDecimal("11")
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@nan = BigDecimal("NaN")
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@infinity = BigDecimal("Infinity")
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@infinity_minus = BigDecimal("-Infinity")
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@one_minus = BigDecimal("-1")
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@frac_1 = BigDecimal("1E-99999")
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@frac_2 = BigDecimal("0.9E-99999")
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end
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it "returns a + b" do
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(@two + @one).should == @three
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(@one + @two).should == @three
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(@one + @one_minus).should == @zero
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(@zero + @one).should == @one
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(@ten + @one).should == @eleven
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(@frac_1 + @frac_2).should == BigDecimal("1.9E-99999")
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(@frac_2 + @frac_1).should == BigDecimal("1.9E-99999")
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(@frac_1 + @frac_1).should == BigDecimal("2E-99999")
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end
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it "returns NaN if NaN is involved" do
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(@one + @nan).nan?.should == true
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(@nan + @one).nan?.should == true
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end
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it "returns Infinity or -Infinity if these are involved" do
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(@zero + @infinity).should == @infinity
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(@frac_2 + @infinity).should == @infinity
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(@two + @infinity_minus).should == @infinity_minus
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end
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it "returns NaN if Infinity + (- Infinity)" do
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(@infinity + @infinity_minus).nan?.should == true
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end
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end
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