A testing apparatus includes a support mechanism, a pushing device, and a clamping device secured to the driving member. The clamping device secures a product. The pushing device includes a guiding pipe, a driving member moveably attached to the guiding pipe, and an elastic member received in the guiding pipe. The elastic member is connected to a first end of the driving member. The first end of the driving member is received in the guiding pipe. The clamping device is secured to the driving member. Wherein the guiding pipe is adapted to receive air, the driving member is adapted to be driven by air to move along a first direction, and the elastic member is adapted to rebound to pull the driving member to move along a second direction opposite to the first direction.