Test-Case Creation Framework for Touchscreen-Based Device Testing

This paper presents a framework for creation of test cases in a system for automated testing of touch screen-based devices. The system aims to automate the process of testing the devices on the final production line. The system uses a stimulation board which electrically stimulates touch screens, completely removing mechanical parts which induce lag and instability. Framework communicates with the stimulation board, sending signals which correspond to types of stimulation the board is supposed to achieve. Supported moves are: single touch, single release, multi touch, multi release, full release, line (swipe), multiline (pinch). The framework communicates with the stimulation board via the serial UART or Local Area Network interface. The testing is performed in following steps: (1) framework sends signals to the stimulation board, (2) board stimulates the device, (3) grabber captures the image of the screen on the device and (4) PC receives the image and verifies its correctness. The preliminary results show that the system is capable of reliable stimulation of touch screens which allows the creation of the complete system for automated testing.