Since ABAP release 7.0, you can create ABAP Unit Test Global Class. Lets see what to do and what not to when using the ABAP Unit Global Test Class. Preface ABAP Unit testing was introduced as part of the ABAP Release 6.40. The global test classes were introduced in the next release i.e. ABAP Release...
ABAP Unit Test Global class usage is a post from ABAP Help Blog.