It seems that the test runner is always looking for the generated test.js files to always be next to the orignial .ts files.
The symptom is that the generates Tests.js file being served to the browser is empty.
JetBrains ReSharper 8.2.2 C# Edition
Build 8.2.2000.5102 on 2014-08-30T16:12:46
(Same with build 8.2.3000)