1 files changed, 25 insertions, 0 deletions
diff --git a/spec/ruby/core/integer/shared/next.rb b/spec/ruby/core/integer/shared/next.rb
new file mode 100644
index 0000000000..85b83d6965
--- /dev/null
+++ b/spec/ruby/core/integer/shared/next.rb
@@ -0,0 +1,25 @@
+describe :integer_next, shared: true do
+  it "returns the next larger positive Fixnum" do
+    2.send(@method).should == 3
+  end
+
+  it "returns the next larger negative Fixnum" do
+    (-2).send(@method).should == -1
+  end
+
+  it "returns the next larger positive Bignum" do
+    bignum_value.send(@method).should == bignum_value(1)
+  end
+
+  it "returns the next larger negative Bignum" do
+    (-bignum_value(1)).send(@method).should == -bignum_value
+  end
+
+  it "overflows a Fixnum to a Bignum" do
+    fixnum_max.send(@method).should == fixnum_max + 1
+  end
+
+  it "underflows a Bignum to a Fixnum" do
+    (fixnum_min - 1).send(@method).should == fixnum_min
+  end
+end