Step 1:
Pull and push the door to see whether it runs smoothly, shakes heavily or makes a big noise or not.
Step 2:
Do pull up on the top supporting bar ,if there is any. That can test the intensity of the aluminum and the strength of the whole.
Step 3:
Trample on the shower base to test the bearing capacity.
Step 4:
Use the shower head to see the water proofness.
Step 5:
Use the glass test rack to see the intensity of the glass.