1 files changed, 11 insertions, 0 deletions
diff --git a/test/-ext-/string/test_enc_associate.rb b/test/-ext-/string/test_enc_associate.rb
index 9e9c14820d..2c84f49db1 100644
--- a/test/-ext-/string/test_enc_associate.rb
+++ b/test/-ext-/string/test_enc_associate.rb
@@ -9,4 +9,15 @@ class Test_StrEncAssociate < Test::Unit::TestCase
     assert_raise(RuntimeError) {s.associate_encoding!(Encoding::US_ASCII)}
     assert_raise(RuntimeError) {s.associate_encoding!(Encoding::UTF_8)}
   end
+
+  Encoding.list.select(&:dummy?).each do |enc|
+    enc = enc.name.tr('-', '_')
+    define_method("test_dummy_encoding_index_#{enc}") do
+      assert_separately(["-r-test-/string", "-", enc], <<-"end;") #do
+        enc = Encoding.const_get(ARGV[0])
+        index = Bug::String.encoding_index(enc)
+        assert(index < 0xffff, "<%#x> expected but was\n<%#x>" % [index & 0xffff, index])
+      end;
+    end
+  end
 end