1 files changed, 23 insertions, 0 deletions
diff --git a/test/openssl/test_pkey_ec.rb b/test/openssl/test_pkey_ec.rb
index e15d875295..4498b2b8b3 100644
--- a/test/openssl/test_pkey_ec.rb
+++ b/test/openssl/test_pkey_ec.rb
@@ -25,6 +25,29 @@ class OpenSSL::TestEC < OpenSSL::TestCase
     end
   end
 
+  def test_dup
+    key = OpenSSL::PKey::EC.new("prime256v1")
+    key.generate_key!
+    key2 = key.dup
+    assert_equal key.to_der, key2.to_der
+    key_tmp = OpenSSL::PKey::EC.new("prime256v1").generate_key!
+    key2.private_key = key_tmp.private_key
+    key2.public_key = key_tmp.public_key
+    assert_not_equal key.to_der, key2.to_der
+
+    group = key.group
+    group2 = group.dup
+    assert_equal group.to_der, group2.to_der
+    group2.asn1_flag ^= OpenSSL::PKey::EC::NAMED_CURVE
+    assert_not_equal group.to_der, group2.to_der
+
+    point = key.public_key
+    point2 = point.dup
+    assert_equal point.to_bn, point2.to_bn
+    point2.invert!
+    assert_not_equal point.to_bn, point2.to_bn
+  end
+
   def compare_keys(k1, k2)
     assert_equal(k1.to_pem, k2.to_pem)
   end