1 files changed, 13 insertions, 0 deletions
diff --git a/test/spec_builder.rb b/test/spec_builder.rb
index 111d7b55..326f6b6c 100644
--- a/test/spec_builder.rb
+++ b/test/spec_builder.rb
@@ -201,6 +201,19 @@ describe Rack::Builder do
      end.must_raise(RuntimeError)
    end
  
+  it "doesn't dupe #to_app when mapping" do
+    app = builder do
+      map '/' do |outer_env|
+        run lambda { |env|  [200, {"Content-Type" => "text/plain"}, [object_id.to_s]] }
+      end
+    end
+
+    builder_app1_id = Rack::MockRequest.new(app).get("/").body.to_s
+    builder_app2_id = Rack::MockRequest.new(app).get("/").body.to_s
+
+    assert_equal builder_app2_id, builder_app1_id
+  end
+
    describe "parse_file" do
      def config_file(name)
        File.join(File.dirname(__FILE__), 'builder', name)