1 files changed, 37 insertions, 0 deletions
diff --git a/spec/ruby/core/numeric/real_spec.rb b/spec/ruby/core/numeric/real_spec.rb
new file mode 100644
index 0000000000..09d482a691
--- /dev/null
+++ b/spec/ruby/core/numeric/real_spec.rb
@@ -0,0 +1,37 @@
+require_relative '../../spec_helper'
+require_relative 'fixtures/classes'
+
+describe "Numeric#real" do
+  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.should.real?
+  end
+end