1 files changed, 31 insertions, 0 deletions
diff --git a/spec/ruby/core/array/dup_spec.rb b/spec/ruby/core/array/dup_spec.rb
new file mode 100644
index 0000000000..f14aeca3b5
--- /dev/null
+++ b/spec/ruby/core/array/dup_spec.rb
@@ -0,0 +1,31 @@
+require_relative '../../spec_helper'
+require_relative 'fixtures/classes'
+require_relative 'shared/clone'
+
+describe "Array#dup" do
+  it_behaves_like :array_clone, :dup # FIX: no, clone and dup are not alike
+
+  it "does not copy frozen status from the original" do
+    a = [1, 2, 3, 4]
+    b = [1, 2, 3, 4]
+    a.freeze
+    aa = a.dup
+    bb = b.dup
+
+    aa.frozen?.should == false
+    bb.frozen?.should == false
+  end
+
+  it "does not copy singleton methods" do
+    a = [1, 2, 3, 4]
+    b = [1, 2, 3, 4]
+    def a.a_singleton_method; end
+    aa = a.dup
+    bb = b.dup
+
+    a.respond_to?(:a_singleton_method).should == true
+    b.respond_to?(:a_singleton_method).should == false
+    aa.respond_to?(:a_singleton_method).should == false
+    bb.respond_to?(:a_singleton_method).should == false
+  end
+end