1 files changed, 27 insertions, 0 deletions
diff --git a/test/rexml/test_document.rb b/test/rexml/test_document.rb
index 3ef584c290..38f502f14d 100644
--- a/test/rexml/test_document.rb
+++ b/test/rexml/test_document.rb
@@ -47,6 +47,20 @@ EOF
 </member>
 EOF
 
+    XML_WITH_NESTED_PARAMETER_ENTITY = <<EOF
+<!DOCTYPE root [
+  <!ENTITY % a "BOOM.BOOM.BOOM.BOOM.BOOM.BOOM.BOOM.BOOM.BOOM.">
+  <!ENTITY % b "%a;%a;%a;%a;%a;%a;%a;%a;%a;%a;%a;%a;%a;%a;%a;">
+  <!ENTITY % c "%b;%b;%b;%b;%b;%b;%b;%b;%b;%b;%b;%b;%b;%b;%b;">
+  <!ENTITY % d "%c;%c;%c;%c;%c;%c;%c;%c;%c;%c;%c;%c;%c;%c;%c;">
+  <!ENTITY % e "%d;%d;%d;%d;%d;%d;%d;%d;%d;%d;%d;%d;%d;%d;%d;">
+  <!ENTITY % f "%e;%e;%e;%e;%e;%e;%e;%e;%e;%e;%e;%e;%e;%e;%e;">
+  <!ENTITY % g "%f;%f;%f;%f;%f;%f;%f;%f;%f;%f;%f;%f;%f;%f;%f;">
+ <!ENTITY test "test %g;">
++]>
+<cd></cd>
+EOF
+
   XML_WITH_4_ENTITY_EXPANSION = <<EOF
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE member [
@@ -85,6 +99,19 @@ EOF
     REXML::Document.entity_expansion_limit = 10000
   end
 
+  def test_entity_expansion_limit_for_parameter_entity
+    assert_raise(REXML::ParseException) do
+      REXML::Document.new(XML_WITH_NESTED_PARAMETER_ENTITY)
+    end
+    REXML::Document.entity_expansion_limit = 100
+    assert_equal(100, REXML::Document.entity_expansion_limit)
+    assert_raise(REXML::ParseException) do
+      REXML::Document.new(XML_WITH_NESTED_PARAMETER_ENTITY)
+    end
+  ensure
+    REXML::Document.entity_expansion_limit = 10000
+  end
+
   def test_tag_in_cdata_with_not_ascii_only_but_ascii8bit_encoding_source
     tag = "<b>...</b>"
     message = "こんにちは、世界！" # Hello world! in Japanese