Improve test coverage for allow_values_for.

remarkable_activerecord/spec/allow_values_for_matcher_spec.rb

@@ -59,13 +59,27 @@ def define_and_validate(options={})
   end
 
   describe 'failures' do
-    it "should fail if any of the values are valid on invalid cases" do
+    before(:each) do
       define_and_validate(:with => /X|Y|Z/)
+    end
 
+    it "should fail if any of the values are valid on invalid cases" do
       lambda {
         should_not allow_values_for :title, 'A', 'X', 'B'
       }.should raise_error(Spec::Expectations::ExpectationNotMetError, /Did not expect Product to be valid/)
     end
+
+    it "should also fail if all values are valid" do
+      lambda {
+        should_not allow_values_for :title, 'X', 'Y', 'Z'
+      }.should raise_error(Spec::Expectations::ExpectationNotMetError, /Did not expect Product to be valid/)
+    end
+
+    it "should not fail if all values are invalid" do
+      lambda {
+        should_not allow_values_for :title, 'A', 'B', 'C'
+      }.should_not raise_error
+    end
   end
 end