1 files changed, 23 insertions, 2 deletions
diff --git a/spec/ruby/core/integer/succ_spec.rb b/spec/ruby/core/integer/succ_spec.rb
index 9ae9a14fe7..2201a4c76d 100644
--- a/spec/ruby/core/integer/succ_spec.rb
+++ b/spec/ruby/core/integer/succ_spec.rb
@@ -1,6 +1,27 @@
 require_relative '../../spec_helper'
-require_relative 'shared/next'
 
 describe "Integer#succ" do
-  it_behaves_like :integer_next, :succ
+  it "returns the next larger positive Fixnum" do
+    2.succ.should == 3
+  end
+
+  it "returns the next larger negative Fixnum" do
+    (-2).succ.should == -1
+  end
+
+  it "returns the next larger positive Bignum" do
+    bignum_value.succ.should == bignum_value(1)
+  end
+
+  it "returns the next larger negative Bignum" do
+    (-bignum_value(1)).succ.should == -bignum_value
+  end
+
+  it "overflows a Fixnum to a Bignum" do
+    fixnum_max.succ.should == fixnum_max + 1
+  end
+
+  it "underflows a Bignum to a Fixnum" do
+    (fixnum_min - 1).succ.should == fixnum_min
+  end
 end