diff options
Diffstat (limited to 'spec/rubyspec/library/bigdecimal/plus_spec.rb')
-rw-r--r-- | spec/rubyspec/library/bigdecimal/plus_spec.rb | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/spec/rubyspec/library/bigdecimal/plus_spec.rb b/spec/rubyspec/library/bigdecimal/plus_spec.rb new file mode 100644 index 0000000000..72ec282075 --- /dev/null +++ b/spec/rubyspec/library/bigdecimal/plus_spec.rb @@ -0,0 +1,47 @@ +require File.expand_path('../../../spec_helper', __FILE__) +require 'bigdecimal' + +describe "BigDecimal#+" do + + before :each do + @one = BigDecimal("1") + @zero = BigDecimal("0") + @two = BigDecimal("2") + @three = BigDecimal("3") + @ten = BigDecimal("10") + @eleven = BigDecimal("11") + @nan = BigDecimal("NaN") + @infinity = BigDecimal("Infinity") + @infinity_minus = BigDecimal("-Infinity") + @one_minus = BigDecimal("-1") + @frac_1 = BigDecimal("1E-99999") + @frac_2 = BigDecimal("0.9E-99999") + end + + it "returns a + b" do + (@two + @one).should == @three + (@one + @two).should == @three + (@one + @one_minus).should == @zero + (@zero + @one).should == @one + (@ten + @one).should == @eleven + (@frac_1 + @frac_2).should == BigDecimal("1.9E-99999") + (@frac_2 + @frac_1).should == BigDecimal("1.9E-99999") + (@frac_1 + @frac_1).should == BigDecimal("2E-99999") + end + + it "returns NaN if NaN is involved" do + (@one + @nan).nan?.should == true + (@nan + @one).nan?.should == true + end + + it "returns Infinity or -Infinity if these are involved" do + (@zero + @infinity).should == @infinity + (@frac_2 + @infinity).should == @infinity + (@two + @infinity_minus).should == @infinity_minus + end + + it "returns NaN if Infinity + (- Infinity)" do + (@infinity + @infinity_minus).nan?.should == true + end + +end |