1 files changed, 18 insertions, 10 deletions
diff --git a/spec/ruby/library/bigdecimal/minus_spec.rb b/spec/ruby/library/bigdecimal/minus_spec.rb
index bdd8478465..bd3c19584b 100644
--- a/spec/ruby/library/bigdecimal/minus_spec.rb
+++ b/spec/ruby/library/bigdecimal/minus_spec.rb
@@ -1,4 +1,4 @@
-require File.expand_path('../../../spec_helper', __FILE__)
+require_relative '../../spec_helper'
 require 'bigdecimal'
 
 describe "BigDecimal#-" do
@@ -26,18 +26,18 @@ describe "BigDecimal#-" do
   end
 
   it "returns NaN if NaN is involved" do
-    (@one - @nan).nan?.should == true
-    (@nan - @one).nan?.should == true
-    (@nan - @nan).nan?.should == true
-    (@nan - @infinity).nan?.should == true
-    (@nan - @infinity_minus).nan?.should == true
-    (@infinity - @nan).nan?.should == true
-    (@infinity_minus - @nan).nan?.should == true
+    (@one - @nan).should.nan?
+    (@nan - @one).should.nan?
+    (@nan - @nan).should.nan?
+    (@nan - @infinity).should.nan?
+    (@nan - @infinity_minus).should.nan?
+    (@infinity - @nan).should.nan?
+    (@infinity_minus - @nan).should.nan?
   end
 
   it "returns NaN both operands are infinite with the same sign" do
-    (@infinity - @infinity).nan?.should == true
-    (@infinity_minus - @infinity_minus).nan?.should == true
+    (@infinity - @infinity).should.nan?
+    (@infinity_minus - @infinity_minus).should.nan?
   end
 
   it "returns Infinity or -Infinity if these are involved" do
@@ -55,4 +55,12 @@ describe "BigDecimal#-" do
     (@one_minus - @infinity).should == @infinity_minus
   end
 
+  describe "with Object" do
+    it "tries to coerce the other operand to self" do
+      object = mock("Object")
+      object.should_receive(:coerce).with(@one).and_return([@one, BigDecimal("42")])
+      (@one - object).should == BigDecimal("-41")
+    end
+  end
+
 end