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-rw-r--r--test/-ext-/struct/test_duplicate.rb22
1 files changed, 22 insertions, 0 deletions
diff --git a/test/-ext-/struct/test_duplicate.rb b/test/-ext-/struct/test_duplicate.rb
new file mode 100644
index 0000000000..77d61988b6
--- /dev/null
+++ b/test/-ext-/struct/test_duplicate.rb
@@ -0,0 +1,22 @@
+# frozen_string_literal: false
+require 'test/unit'
+require "-test-/struct"
+
+class Bug::Struct::Test_Duplicate < Test::Unit::TestCase
+ def test_new_dupilicate
+ bug12291 = '[ruby-core:74971] [Bug #12291]'
+ assert_raise_with_message(ArgumentError, /duplicate member/, bug12291) {
+ Bug::Struct.new_duplicate(nil, "a")
+ }
+ assert_raise_with_message(ArgumentError, /duplicate member/, bug12291) {
+ Bug::Struct.new_duplicate("X", "a")
+ }
+ end
+
+ def test_new_dupilicate_under
+ bug12291 = '[ruby-core:74971] [Bug #12291]'
+ assert_raise_with_message(ArgumentError, /duplicate member/, bug12291) {
+ Bug::Struct.new_duplicate_under("x", "a")
+ }
+ end
+end