Update testThreadUnsafe

Author: nmdias

Sources/DefaultsKit/Defaults.swift

@@ -47,7 +47,7 @@ public struct Defaults {
 
   /// Shared instance of `Defaults`, used for ad-hoc access to the user's
   /// defaults database throughout the app.
-  public nonisolated(unsafe) static let shared = Defaults()
+  public static let shared = Defaults()
 
   /// An instance of `Defaults` with the specified `UserDefaults` instance.
   ///

Tests/DefaultsKitTests/DefaultsTests.swift

@@ -215,9 +215,9 @@ struct DefaultsKitTests {
   }
 
   @Test
-  func testThreadSafe() async throws {
+  func testThreadUnsafe() async {
     // Given
-    let defaults = Defaults.shared
+    let defaults = Defaults()
     let iterations = 10000
 
     // When
@@ -226,7 +226,6 @@ struct DefaultsKitTests {
 
     await withTaskGroup(of: Void.self) { taskGroup in
       for i in 1 ... iterations {
-        // Add a task to the group
         taskGroup.addTask {
           defaults.set(i, for: .integerKey) // Write a value
           if let value = defaults.get(for: .integerKey) {
@@ -242,6 +241,6 @@ struct DefaultsKitTests {
     }
 
     // Then
-    #expect(expected == actual)
+    #expect(expected != actual)
   }
 }