com.apple.XCTestErrorDomain Code=0

I tried to perform unitest using XCTest with monitor, but the testcase failed with error messages below:

Error Domain=com.apple.XCTestErrorDomain Code=0 "The operation couldn’t be completed. (com.apple.XCTestErrorDomain error 0.)"


No google results showed the reson and solution.

Does anybody know it ?

Thank you so much.

com.apple.XCTestErrorDomain Code=0
 
 
Q