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-rw-r--r--test/test_format.rb5
1 files changed, 5 insertions, 0 deletions
diff --git a/test/test_format.rb b/test/test_format.rb
index f251e6b..0441d9a 100644
--- a/test/test_format.rb
+++ b/test/test_format.rb
@@ -12,6 +12,11 @@ class TestFormat < Testcase
     assert_equal({}, hash)
   end
 
+  def test_equal
+    fmt = DTAS::Format.new
+    assert_equal fmt, fmt.dup
+  end
+
   def test_nonstandard
     fmt = DTAS::Format.new
     fmt.type = "s16"