Spacecraft testing is a crucial process that ensures a spacecraft can withstand the harsh conditions of space. This includes testing for temperature extremes, radiation levels, and vacuum conditions. Engineers simulate these environments to identify any potential issues before the spacecraft is launched. Additionally, spacecraft undergo various performance tests to evaluate their systems, such as propulsion and communication. These tests help verify that components like satellites and rovers function correctly and can complete their missions. Successful testing is essential for the safety and effectiveness of space exploration missions conducted by organizations like NASA and ESA.