in Sources/XCTest/Public/XCTAssert.swift [69:83]
func failureDescription(_ assertion: _XCTAssertion) -> String {
let explanation: String
switch self {
case .success: explanation = "passed"
case .expectedFailure(let details?): explanation = "failed: \(details)"
case .expectedFailure(_): explanation = "failed"
case .unexpectedFailure(let error): explanation = "threw error \"\(error)\""
}
if let name = assertion.name {
return "\(name) \(explanation)"
} else {
return explanation
}
}