1 files changed, 15 insertions, 0 deletions
diff --git a/spec/ruby/core/fixnum/succ_spec.rb b/spec/ruby/core/fixnum/succ_spec.rb
new file mode 100644
index 0000000000..50dd8c9481
--- /dev/null
+++ b/spec/ruby/core/fixnum/succ_spec.rb
@@ -0,0 +1,15 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+
+describe "Fixnum#succ" do
+  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 "overflows a Fixnum to a Bignum" do
+    fixnum_max.succ.should == (fixnum_max + 1)
+  end
+end