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// RUN: %target-run-simple-swift( -Xfrontend -disable-availability-checking -parse-as-library) | %FileCheck %s --dump-input=always
// TODO: move to target-run-simple-leaks-swift once CI is using at least Xcode 14.3
// REQUIRES: concurrency
// REQUIRES: executable_test
// REQUIRES: concurrency_runtime
// UNSUPPORTED: back_deployment_runtime
// UNSUPPORTED: freestanding
// FIXME: this test is flaky; rdar://115756502
// ALLOW_RETRIES: 1
// FIXME: enable discarding taskgroup on windows; rdar://104762037
// UNSUPPORTED: OS=windows-msvc
import _Concurrency
actor SimpleCountDownLatch {
let from: Int
var count: Int
var continuation: CheckedContinuation<Void, Never>?
init(from: Int) {
self.from = from
self.count = from
}
func hit() {
defer { count -= 1 }
if count == 0 {
fatalError("Counted down more times than expected! (From: \(from))")
} else if count == 1 {
continuation?.resume()
}
}
func wait() async {
guard self.count > 0 else {
return // we're done
}
return await withCheckedContinuation { cc in
self.continuation = cc
}
}
}
final class PrintDeinit {
let id: String
init(id: String) {
self.id = id
}
deinit {
print("deinit, id: \(id)")
}
}
struct Boom: Error {
let printDeinit: PrintDeinit
init(id: String) {
self.printDeinit = PrintDeinit(id: id)
}
}
final class BoomClass: Error {
let id: String
init(id: String) {
self.id = id
}
deinit {
print("deinit, id: \(id)")
}
}
final class SomeClass: @unchecked Sendable {
let id: String
init(id: String) {
self.id = id
}
deinit {
print("deinit, id: \(id)")
}
}
// NOTE: Not as StdlibUnittest/TestSuite since these types of tests are unreasonably slow to load/debug.
func testTwo() async {
let latch = SimpleCountDownLatch(from: 2)
_ = try? await withThrowingDiscardingTaskGroup() { group in
group.addTask {
await latch.hit()
throw Boom(id: "race-boom")
}
group.addTask {
await latch.hit()
SomeClass(id: "race-boom-class") // will be discarded
}
return 12
}
// since values may deinit in any order, we just assert their count basically
// CHECK-DAG: deinit, id: race-boom
// CHECK-DAG: deinit, id: race-boom
await latch.wait()
try? await Task.sleep(for: .milliseconds(300))
print("done") // CHECK: done
}
func manyOk() async {
let latch = SimpleCountDownLatch(from: 6)
_ = try? await withThrowingDiscardingTaskGroup() { group in
for i in 0..<6 {
group.addTask {
await latch.hit()
_ = SomeClass(id: "many-ok") // will be discarded
}
}
return 12
}
// since values may deinit in any order, we just assert their count basically
// CHECK-DAG: deinit, id: many-ok
// CHECK-DAG: deinit, id: many-ok
// CHECK-DAG: deinit, id: many-ok
// CHECK-DAG: deinit, id: many-ok
// CHECK-DAG: deinit, id: many-ok
// CHECK-DAG: deinit, id: many-ok
await latch.wait()
try? await Task.sleep(for: .milliseconds(300))
print("done") // CHECK: done
}
func manyThrows() async {
let latch = SimpleCountDownLatch(from: 6)
do {
let value: Void = try await withThrowingDiscardingTaskGroup() { group in
for i in 0..<6 {
group.addTask {
await latch.hit()
throw BoomClass(id: "many-error") // will be rethrown
}
}
// since values may deinit in any order, we just assert their count basically
// CHECK-DAG: deinit, id: many-error
// CHECK-DAG: deinit, id: many-error
// CHECK-DAG: deinit, id: many-error
// CHECK-DAG: deinit, id: many-error
// CHECK-DAG: deinit, id: many-error
// CHECK-DAG: deinit, id: many-error
12 // must be ignored
}
preconditionFailure("Should throw")
} catch {
precondition("\(error)" == "main.BoomClass", "error was: \(error)")
}
await latch.wait()
try? await Task.sleep(for: .milliseconds(300))
print("done") // CHECK: done
}
func manyValuesThrows() async {
let latch = SimpleCountDownLatch(from: 6)
// many errors, many values
_ = try? await withThrowingDiscardingTaskGroup() { group in
group.addTask {
await latch.hit()
_ = SomeClass(id: "mixed-ok") // will be discarded
}
group.addTask {
await latch.hit()
_ = SomeClass(id: "mixed-ok") // will be discarded
}
group.addTask {
await latch.hit()
_ = SomeClass(id: "mixed-ok") // will be discarded
}
group.addTask {
await latch.hit()
throw Boom(id: "mixed-error")
}
group.addTask {
await latch.hit()
throw Boom(id: "mixed-error")
}
group.addTask {
await latch.hit()
throw Boom(id: "mixed-error")
}
return 12
}
// since values may deinit in any order, we just assert their count basically
// three ok's
// CHECK-DAG: deinit, id: mixed
// CHECK-DAG: deinit, id: mixed
// CHECK-DAG: deinit, id: mixed
// three errors
// CHECK-DAG: deinit, id: mixed
// CHECK-DAG: deinit, id: mixed
// CHECK-DAG: deinit, id: mixed
await latch.wait()
try? await Task.sleep(for: .milliseconds(300))
print("done") // CHECK: done
}
@main struct Main {
static func main() async {
await testTwo()
await manyOk()
await manyThrows()
await manyValuesThrows()
}
}
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