Files
swift-mirror/validation-test/Evolution/test_enum_add_cases_trap.swift
Jordan Rose 9be6519f5a [SILGen] Show a message when an unexpected enum value is switched on (#15614)
Builds on 36eae9d4f6 to emit a message instead of just trapping
when a switch over a non-frozen enum ends up not matching anything.
If the enum is known to be an @objc enum, the message is

  unexpected enum case 'MyEnum(rawValue: -42)'

and if it's anything else (a Swift enum, a tuple containing enums,
whatever), it's a more opaque

  unexpected enum case while switching on value of type 'MyEnum'

The reason for this is to avoid calling String(describing:) or
String(reflecting:) an arbitrary value when the enum might conform to
CustomStringConvertible and therefore /itself/ have a switch that's
going to fall off the end. By handling plain @objc enums (using a
bitcast), we've at least covered the 90% case.

rdar://problem/37728359
2018-04-03 11:21:36 -07:00

219 lines
5.1 KiB
Swift

// RUN: %target-resilience-test
// REQUIRES: executable_test
import StdlibUnittest
import enum_add_cases_trap
var EnumAddCasesTest = TestSuite("EnumAddCasesTrap")
extension TestSuite {
func testCrashOnNewLibrary(_ typeName: String, code: @escaping () -> Void) {
let newTest = self.test(typeName)
if getVersion() == 0 {
newTest.code(code)
} else {
newTest.crashOutputMatches("'\(typeName)'").code {
expectCrashLater()
code()
}
}
}
}
func evaluateAddNoPayloadToSingletonCases(_ e: [AddNoPayloadToSingleton]) -> [Int] {
return e.map {
switch $0 {
case .Noses:
return 0
#if AFTER
default:
fatalError("dummy error for '\(type(of: $0))'")
#endif
}
}
}
EnumAddCasesTest.testCrashOnNewLibrary("AddNoPayloadToSingleton") {
if getVersion() == 0 {
expectEqual([0],
evaluateAddNoPayloadToSingletonCases(addNoPayloadToSingletonCases()))
} else {
_ = evaluateAddNoPayloadToSingletonCases(addNoPayloadToSingletonCases())
}
}
///////////////////////////////////////////////////////////////////////
func evaluateAddPayloadToSingletonCases(_ e: [AddPayloadToSingleton]) -> [Int] {
return e.map {
switch $0 {
case .Cats:
return 0
#if AFTER
default:
fatalError("dummy error for '\(type(of: $0))'")
#endif
}
}
}
EnumAddCasesTest.testCrashOnNewLibrary("AddPayloadToSingleton") {
do {
let s = Starfish()
if getVersion() == 0 {
expectEqual([0],
evaluateAddPayloadToSingletonCases(addPayloadToSingletonCases(s)))
} else {
_ = evaluateAddPayloadToSingletonCases(addPayloadToSingletonCases(s))
}
}
expectEqual(starfishCount, 0)
}
///////////////////////////////////////////////////////////////////////
func evaluateAddNoPayloadToSinglePayloadCases(_ s: Starfish,
_ e: [AddNoPayloadToSinglePayload])
-> [Int] {
return e.map {
switch $0 {
case .Cats(let ss):
expectTrue(s === ss)
return 0
case .Noses:
return 1
#if AFTER
default:
fatalError("dummy error for '\(type(of: $0))'")
#endif
}
}
}
EnumAddCasesTest.testCrashOnNewLibrary("AddNoPayloadToSinglePayload") {
do {
let s = Starfish()
if getVersion() == 0 {
expectEqual([0, 1],
evaluateAddNoPayloadToSinglePayloadCases(s, addNoPayloadToSinglePayloadCases(s)))
} else {
_ = evaluateAddNoPayloadToSinglePayloadCases(s, addNoPayloadToSinglePayloadCases(s))
}
}
expectEqual(starfishCount, 0)
}
///////////////////////////////////////////////////////////////////////
func evaluateAddPayloadToSinglePayloadCases(_ s: Starfish,
_ e: [AddPayloadToSinglePayload])
-> [Int] {
return e.map {
switch $0 {
case .Cats:
return 0
case .Paws(let ss):
expectTrue(s === ss)
return 1
#if AFTER
default:
fatalError("dummy error for '\(type(of: $0))'")
#endif
}
}
}
EnumAddCasesTest.testCrashOnNewLibrary("AddPayloadToSinglePayload") {
do {
let s = Starfish()
if getVersion() == 0 {
expectEqual([0, 1],
evaluateAddPayloadToSinglePayloadCases(s, addPayloadToSinglePayloadCases(s)))
} else {
_ = evaluateAddPayloadToSinglePayloadCases(s, addPayloadToSinglePayloadCases(s))
}
}
expectEqual(starfishCount, 0)
}
///////////////////////////////////////////////////////////////////////
func evaluateAddNoPayloadToMultiPayloadCases(_ s: Starfish,
_ e: [AddNoPayloadToMultiPayload])
-> [Int] {
return e.map {
switch $0 {
case .Cats(let ss):
expectTrue(s === ss)
return 0
case .Puppies(let ss):
expectTrue(s === ss)
return 1
#if AFTER
default:
fatalError("dummy error for '\(type(of: $0))'")
#endif
}
}
}
EnumAddCasesTest.testCrashOnNewLibrary("AddNoPayloadToMultiPayload") {
do {
let s = Starfish()
if getVersion() == 0 {
expectEqual([0, 1],
evaluateAddNoPayloadToMultiPayloadCases(s, addNoPayloadToMultiPayloadCases(s)))
} else {
_ = evaluateAddNoPayloadToMultiPayloadCases(s, addNoPayloadToMultiPayloadCases(s))
}
}
expectEqual(starfishCount, 0)
}
///////////////////////////////////////////////////////////////////////
func evaluateAddPayloadToMultiPayloadCases(_ s: Starfish,
_ e: [AddPayloadToMultiPayload])
-> [Int] {
return e.map {
switch $0 {
case .Cats(let ss):
expectTrue(s === ss)
return 0
case .Ponies(let ss):
expectTrue(s === ss)
return 1
case .Pandas:
return 2
#if AFTER
default:
fatalError("dummy error for '\(type(of: $0))'")
#endif
}
}
}
EnumAddCasesTest.testCrashOnNewLibrary("AddPayloadToMultiPayload") {
do {
let s = Starfish()
if getVersion() == 0 {
expectEqual([0, 1, 2],
evaluateAddPayloadToMultiPayloadCases(s, addPayloadToMultiPayloadCases(s)))
} else {
_ = evaluateAddPayloadToMultiPayloadCases(s, addPayloadToMultiPayloadCases(s))
}
}
expectEqual(starfishCount, 0)
}
runAllTests()