Remove Encoding#replicate

1 files changed, 15 insertions, 0 deletions

diff --git a/test/-ext-/string/test_too_many_dummy_encodings.rb b/test/-ext-/string/test_too_many_dummy_encodings.rb
new file mode 100644
index 0000000000..4d71fd1d72
--- /dev/null
+++ b/test/-ext-/string/test_too_many_dummy_encodings.rb
@@ -0,0 +1,15 @@
+# frozen_string_literal: false
+require 'test/unit'
+require "-test-/string"
+
+class Test_TooManyDummyEncodings < Test::Unit::TestCase
+  def test_exceed_encoding_table_size
+    assert_separately(%w[--disable=gems], "#{<<~"begin;"}\n#{<<~'end;'}")
+    begin;
+      require "-test-/string"
+      assert_raise_with_message(EncodingError, /too many encoding/) do
+        1_000.times{|i| Bug::String.rb_define_dummy_encoding("R_#{i}") } # now 256 entries
+      end
+    end;
+  end
+end