Hopper is a software test tool for Windows Mobile 6.0, 6.1, and 6.5 that simulates random user input on mobile devices providing a sometimes meaningful mean time to failure (MTTF) number. It is designed to find bugs and is not intended to run scenario tests or do "specific user things" - it is completely random. Hopper stresses the entire device and will execute anything accessible through the UI many, many times. It has no knowledge of where it is at any time and has limited ability to detect poor system health. Hopper executes randomly, thus different bugs might be encountered each time the tool runs. Fixing enough bugs to impact MTTF may take many runs. Reproducing specific runs and/or finding the particular bug that caused any specific failure can prove to be difficult.[…]

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