1 files changed, 25 insertions, 0 deletions
diff --git a/spec/rubyspec/core/objectspace/_id2ref_spec.rb b/spec/rubyspec/core/objectspace/_id2ref_spec.rb
new file mode 100644
index 0000000000..6e0b6e03fb
--- /dev/null
+++ b/spec/rubyspec/core/objectspace/_id2ref_spec.rb
@@ -0,0 +1,25 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+
+describe "ObjectSpace._id2ref" do
+  it "converts an object id to a reference to the object" do
+    s = "I am a string"
+    r = ObjectSpace._id2ref(s.object_id)
+    r.should == s
+  end
+
+  it "retrieves a Fixnum by object_id" do
+    f = 1
+    r = ObjectSpace._id2ref(f.object_id)
+    r.should == f
+  end
+
+  it "retrieves a Symbol by object_id" do
+    s = :sym
+    r = ObjectSpace._id2ref(s.object_id)
+    r.should == s
+  end
+
+  it 'raises RangeError when an object could not be found' do
+    proc { ObjectSpace._id2ref(1 << 60) }.should raise_error(RangeError)
+  end
+end