Testing apparatus

A testing apparatus for testing whether a depth of a server chassis is in a desired depth range or not, a plurality of receiving spaces defined in the server chassis, the testing apparatus capable of being received in corresponding receiving space of the server chassis and comprising:

• a testing frame configured for being received and secured in the server chassis;
• a testing unit mounted on the frame, the test unit comprising a testing pole telescopingly retained in a rear wall of the frame, a pair of first and second contacting members spaced apart with a distance in accordance with the desired depth range, and a trigger member secured to the testing pole and moving with the testing pole to come in contact with the first or second contacting members or neither of them;
• a signal processing member mounted on the frame and electrically connected to the test unit for sending a signal based on connection status between trigger member and the contact poles when the frame is secured in the server chassis;
• and
• an indicating member mounted on the frame and electrically connected to the signal processing member to indicate the testing result according to the signal.