1 files changed, 23 insertions, 0 deletions
diff --git a/spec/ruby/core/range/dup_spec.rb b/spec/ruby/core/range/dup_spec.rb
new file mode 100644
index 0000000000..fab3c3f1b2
--- /dev/null
+++ b/spec/ruby/core/range/dup_spec.rb
@@ -0,0 +1,23 @@
+require_relative '../../spec_helper'
+
+describe "Range#dup" do
+  it "duplicates the range" do
+    original = (1..3)
+    copy = original.dup
+    copy.begin.should == 1
+    copy.end.should == 3
+    copy.should_not.exclude_end?
+    copy.should_not.equal?(original)
+
+    copy = ("a"..."z").dup
+    copy.begin.should == "a"
+    copy.end.should == "z"
+    copy.should.exclude_end?
+  end
+
+  it "creates an unfrozen range" do
+    (1..2).dup.should_not.frozen?
+    (1..).dup.should_not.frozen?
+    Range.new(1, 2).dup.should_not.frozen?
+  end
+end