OptionalTraps.swift

// RUN: rm -rf %t
// RUN: mkdir -p %t
// RUN: %target-build-swift %s -o %t/Assert_Debug -Onone
// RUN: %target-build-swift %s -Xfrontend -disable-access-control -o %t/Assert_Release -O
// RUN: %target-build-swift %s -Xfrontend -disable-access-control -o %t/Assert_Unchecked -Ounchecked
//
// RUN: %target-run %t/Assert_Debug
// RUN: %target-run %t/Assert_Release
// RUN: %target-run %t/Assert_Unchecked
// REQUIRES: executable_test

import StdlibUnittest

// Also import modules which are used by StdlibUnittest internally. This
// workaround is needed to link all required libraries in case we compile
// StdlibUnittest with -sil-serialize-all.
import SwiftPrivate
#if _runtime(_ObjC)
import ObjectiveC
#endif

func returnNil() -> AnyObject? {
  return _opaqueIdentity(nil as AnyObject?)
}

var OptionalTraps = TestSuite("OptionalTraps")

OptionalTraps.test("UnwrapNone")
  .skip(.Custom(
    { _isFastAssertConfiguration() },
    reason: "this trap is not guaranteed to happen in -Ounchecked"))
  .code {
  var a: AnyObject? = returnNil()
  expectCrashLater()
  let unwrapped: AnyObject = a!
  _blackHole(unwrapped)
}

OptionalTraps.test("UnwrapNone/Ounchecked")
  .xfail(.Custom(
    { !_isFastAssertConfiguration() },
    reason: "unwrapping nil should trap unless we are in -Ounchecked mode"))
  .code {
  var a: AnyObject? = returnNil()
  expectEqual(0, unsafeBitCast(a!, Int.self))
}

runAllTests()