Hi, I have problem to send you internet links but try to find in youtube some tests – “Functional examination shoulder - Cyriax orthopaedic medicine”
-. First make active lateral elevation test (0:23 second of the video) and verify when do you have pain. Your range of motion in the shoulder normally is from 0 grades to 180 grades, If the pain occurs in the middle of the motions between 30-120 that means that you have "painful arc" additionally make resistance lateral abduction test (1:35 second of the video) if you will have pain during this test and painful arc during the first one that means that you can have injured supraspinatus muscle. Good treatment is deep friction massage for supraspinatus muscle, find this test in you tube-“ Cyriax transverse friction massage supraspinatus”
somebody have to make it for you without break about 15 minutes. It is a little complicated but I hope that you understand.
If you understand the others tests from the first movies try to do them and tell me when do you have pain.
regards,
Wojciech