A test of task

main.swift

func wait() async {
    await Task.sleep(1000000000)
}

Thread.current.name = "Main thread"
print("Thread in top-level is \(Thread.current.name)")

Task {
    print("Thread in task before wait is \(Thread.current.name)")
    if Thread.current.name!.isEmpty {
        Thread.current.name = "Task thread"
        print("Change thread name \(Thread.current.name)")
    }
    await wait()
    print("Thread in task after wait is \(Thread.current.name)")

}

Thread.sleep(until: .now + 2)

// print as follow

// Thread in top-level is Optional("Main thread")
// Thread in task before wait is Optional("")
// Change thread name Optional("Task thread")
// Thread in task after wait is Optional("")

// Thread in task is different before and after `wait()`
// Thread in task is not "Main thread"