1 files changed, 11 insertions, 0 deletions
diff --git a/spec/ruby/core/encoding/dummy_spec.rb b/spec/ruby/core/encoding/dummy_spec.rb
index 75ffcd5a4e..77caebca9a 100644
--- a/spec/ruby/core/encoding/dummy_spec.rb
+++ b/spec/ruby/core/encoding/dummy_spec.rb
@@ -11,4 +11,15 @@ describe "Encoding#dummy?" do
     Encoding::CP50221.dummy?.should be_true
     Encoding::UTF_7.dummy?.should be_true
   end
+
+  it "returns true for UTF_16 and UTF_32" do
+    Encoding::UTF_16.should.dummy?
+    Encoding::UTF_32.should.dummy?
+  end
+
+  it "implies not #ascii_compatible?" do
+    Encoding.list.select(&:dummy?).each do |encoding|
+      encoding.should_not.ascii_compatible?
+    end
+  end
 end