1 files changed, 15 insertions, 0 deletions
diff --git a/spec/ruby/library/bigdecimal/multiply_spec.rb b/spec/ruby/library/bigdecimal/multiply_spec.rb
index 2741d3623e..a8ce1da32e 100644
--- a/spec/ruby/library/bigdecimal/multiply_spec.rb
+++ b/spec/ruby/library/bigdecimal/multiply_spec.rb
@@ -8,6 +8,7 @@ end
 
 describe "BigDecimal#*" do
   before :each do
+    @three = BigDecimal("3")
     @e3_minus = BigDecimal("3E-20001")
     @e3_plus = BigDecimal("3E20001")
     @e = BigDecimal("1.00000000000000000000123456789")
@@ -23,4 +24,18 @@ describe "BigDecimal#*" do
     (@e3_minus * @e3_minus).should == BigDecimal("9E-40002")
     (@e * @one).should == @e
   end
+
+  describe "with Object" do
+    it "tries to coerce the other operand to self" do
+      object = mock("Object")
+      object.should_receive(:coerce).with(@e3_minus).and_return([@e3_minus, @e3_plus])
+      (@e3_minus * object).should == BigDecimal("9")
+    end
+  end
+
+  describe "with Rational" do
+    it "produces a BigDecimal" do
+      (@three * Rational(500, 2)).should == BigDecimal("0.75e3")
+    end
+  end
 end