Back in 2010, JASPO published their testing methodology and procedures:
Note that we are talking about 'survivability testing', we are talking about actual live fire testing with real weapons.
The FUSL testing conducted on AA-1 was very successful meeting all defined test objectives and success criteria. Addressing synergistic effects, the electrical power and flight control systems successfully isolated failures and protected the redundancies built into these systems, allowing continued safe flight. The VSN architecture is robust, providing multiple paths to transfer data. Testing highlighted that fire is a significant threat to flight critical systems. The test team was able to verify that the actual ballistic damage response correlated very well to previous pilot in the loop simulator testing. Over the course of the test program, the LFT team witnessed firsthand the robustness of the F35 flight critical systems, no cheap system kills.
It appears F-35 is doing very well from a survivability standpoint if one were to get hit.