1 files changed, 29 insertions, 5 deletions
diff --git a/spec/ruby/core/numeric/real_spec.rb b/spec/ruby/core/numeric/real_spec.rb
index 3e34410155..09d482a691 100644
--- a/spec/ruby/core/numeric/real_spec.rb
+++ b/spec/ruby/core/numeric/real_spec.rb
@@ -1,13 +1,37 @@
-require File.expand_path('../../../spec_helper', __FILE__)
-require File.expand_path('../../../shared/complex/numeric/real', __FILE__)
-require File.expand_path('../fixtures/classes', __FILE__)
+require_relative '../../spec_helper'
+require_relative 'fixtures/classes'
 
 describe "Numeric#real" do
-  it_behaves_like(:numeric_real, :real)
+  before :each do
+    @numbers = [
+      20,             # Integer
+      398.72,         # Float
+      Rational(3, 4), # Rational
+      bignum_value,   # Bignum
+      infinity_value,
+      nan_value
+    ].map{ |n| [n, -n] }.flatten
+  end
+
+  it "returns self" do
+    @numbers.each do |number|
+      if number.to_f.nan?
+        number.real.nan?.should == true
+      else
+        number.real.should == number
+      end
+    end
+  end
+
+  it "raises an ArgumentError if given any arguments" do
+    @numbers.each do |number|
+      -> { number.real(number) }.should.raise(ArgumentError)
+    end
+  end
 end
 
 describe "Numeric#real?" do
   it "returns true" do
-    NumericSpecs::Subclass.new.real?.should == true
+    NumericSpecs::Subclass.new.should.real?
   end
 end