[Concurrency] Extra runtime test for global task local

Author: ktoso

test/Concurrency/Runtime/async_task_locals_basic.swift

@@ -8,11 +8,14 @@
 // REQUIRES: concurrency_runtime
 // UNSUPPORTED: back_deployment_runtime
 
-final class StringLike: Sendable, CustomStringConvertible {
+final class StringLike: Sendable, ExpressibleByStringLiteral, CustomStringConvertible {
   let value: String
   init(_ value: String) {
     self.value = value
   }
+  init(stringLiteral value: StringLiteralType) {
+    self.value = value
+  }
 
   var description: String { value }
 }
@@ -33,6 +36,9 @@ enum TL {
   static var clazz: ClassTaskLocal?
 }
 
+@TaskLocal
+var globalTaskLocal: StringLike = StringLike("<not-set>")
+
 @available(SwiftStdlib 5.1, *)
 final class ClassTaskLocal: Sendable {
   init() {
@@ -217,6 +223,13 @@ func inside_actor() async {
   await Worker().setAndRead()
 }
 
+@available(SwiftStdlib 5.1, *)
+func global_task_local() async {
+  await $globalTaskLocal.withValue("value-1") {
+    await printTaskLocalAsync($globalTaskLocal) // CHECK-NEXT: TaskLocal<StringLike>(defaultValue: <not-set>) (value-1)
+  }
+}
+
 @available(SwiftStdlib 5.1, *)
 @main struct Main {
   static func main() async {
@@ -229,5 +242,6 @@ func inside_actor() async {
     await nested_3_onlyTopContributesAsync()
     await nested_3_onlyTopContributesMixed()
     await inside_actor()
+    await global_task_local()
   }
 }