tests for sample app, they work again now after b34c82d62a2889605f20eb38816f9fe501d93bec which merged 72912877d93cd694b22301da2ee644d8d2040711 (and 24c4a063c9d4d434c689b9865d3556990fc845b2 / 9d43dea63af02aef7eaaa6b2fa276b551673af97). this is good fun. refs #859, #861 and #380