Based on the provided context, here are the relevant facts about testing:
1. Midnight aircraft is undergoing extensive flight testing with pilots on board, equipped with hundreds of sensors including string gauges, accelerometers, and temperature sensors to capture structural integrity, vibration data, and other critical metrics .
2. The company has developed a simulator to test spaceship software and flight control systems in advance of actual flights, which is designed to reduce risk and accelerate the flight test program .
3. NGS testing is mentioned as being fairly common in the United States for certain populations, with plans to incorporate it into regular blood work .
4. The company references testing their models against challenging market conditions, stating they’re designing systems to perform well in various economic climates .
5. For the Midnight aircraft program, piloted testing has already begun as ground tests are completed, with piloted flights expected to start within a week from the context’s timeframe .
No other testing information is provided in the given context.