OUString::isEmpty()

I’m sure I’m not doing something correctly, but when isEmpty() seems to be doing something odd on 
new OUString objects. 

The following is a code snippet that highlights the issue:

OUString aString;
if (aString.isEmpty())
   cout << “Detected as empty”;
else
   cout << “Not detected as empty”;

That gives me “Not detected as empty”. 

So I wrote a unit test, and it’s failing. 

You can see the unit test here:

https://gerrit.libreoffice.org/#/c/21506/ 

Same basic thing - the test fails!

Any ideas what is going on here? My understanding was that if you create a new OUString then it 
should initialize itself to an empty string. That doesn’t seem to be occuring...

Chris