1 files changed, 30 insertions, 10 deletions
diff --git a/spec/ruby/core/integer/odd_spec.rb b/spec/ruby/core/integer/odd_spec.rb
index 2aa76d054a..c0c907a906 100644
--- a/spec/ruby/core/integer/odd_spec.rb
+++ b/spec/ruby/core/integer/odd_spec.rb
@@ -1,18 +1,38 @@
 require File.expand_path('../../../spec_helper', __FILE__)
 
 describe "Integer#odd?" do
-  it "returns true when self is an odd number" do
-    (-2).odd?.should be_false
-    (-1).odd?.should be_true
+  context "fixnum" do
+    it "returns true when self is an odd number" do
+      (-2).odd?.should be_false
+      (-1).odd?.should be_true
 
-    0.odd?.should be_false
-    1.odd?.should be_true
-    2.odd?.should be_false
+      0.odd?.should be_false
+      1.odd?.should be_true
+      2.odd?.should be_false
 
-    bignum_value(0).odd?.should be_false
-    bignum_value(1).odd?.should be_true
+      bignum_value(0).odd?.should be_false
+      bignum_value(1).odd?.should be_true
 
-    (-bignum_value(0)).odd?.should be_false
-    (-bignum_value(1)).odd?.should be_true
+      (-bignum_value(0)).odd?.should be_false
+      (-bignum_value(1)).odd?.should be_true
+    end
+  end
+
+  context "bignum" do
+    it "returns true if self is odd and positive" do
+      (987279**19).odd?.should be_true
+    end
+
+    it "returns true if self is odd and negative" do
+      (-9873389**97).odd?.should be_true
+    end
+
+    it "returns false if self is even and positive" do
+      (10000000**10).odd?.should be_false
+    end
+
+    it "returns false if self is even and negative" do
+      (-1000000**100).odd?.should be_false
+    end
   end
 end