Update to ruby/spec@875a09e

1 files changed, 7 insertions, 0 deletions

diff --git a/spec/ruby/library/bigdecimal/sub_spec.rb b/spec/ruby/library/bigdecimal/sub_spec.rb
index f0068b12a9..29ec851193 100644
--- a/spec/ruby/library/bigdecimal/sub_spec.rb
+++ b/spec/ruby/library/bigdecimal/sub_spec.rb
@@ -7,6 +7,7 @@ describe "BigDecimal#sub" do
     @one = BigDecimal("1")
     @zero = BigDecimal("0")
     @two = BigDecimal("2")
+    @three = BigDecimal("3")
     @nan = BigDecimal("NaN")
     @infinity = BigDecimal("Infinity")
     @infinity_minus = BigDecimal("-Infinity")
@@ -42,6 +43,12 @@ describe "BigDecimal#sub" do
     end
   end
 
+  describe "with Rational" do
+    it "produces a BigDecimal" do
+      (@three - Rational(500, 2)).should == BigDecimal('-0.247e3')
+    end
+  end
+
   it "returns NaN if NaN is involved" do
     @one.sub(@nan, 1).nan?.should == true
     @nan.sub(@one, 1).nan?.should == true