[Feature #19163] Data object should be frozen

1 files changed, 8 insertions, 0 deletions

diff --git a/test/ruby/test_data.rb b/test/ruby/test_data.rb
index f63b0236fb..b8dc55815b 100644
--- a/test/ruby/test_data.rb
+++ b/test/ruby/test_data.rb
@@ -62,6 +62,7 @@ class TestData < Test::Unit::TestCase
     assert_equal(1, test.foo)
     assert_equal(2, test.bar)
     assert_equal(test, klass.new(1, 2))
+    assert_predicate(test, :frozen?)
 
     # Keywords
     test_kw = klass.new(foo: 1, bar: 2)
@@ -169,4 +170,11 @@ class TestData < Test::Unit::TestCase
     assert_equal([], test.members)
     assert_equal({}, test.to_h)
   end
+
+  def test_dup
+    klass = Data.define(:foo, :bar)
+    test = klass.new(foo: 1, bar: 2)
+    assert_equal(klass.new(foo: 1, bar: 2), test.dup)
+    assert_predicate(test.dup, :frozen?)
+  end
 end