Move AsyncOperation into Operations static library and add separate tests

1 files changed, 30 insertions, 0 deletions

diff --git a/ios/Shared/Swizzle.swift b/ios/Shared/Swizzle.swift
new file mode 100644
index 0000000000..6073384cf4
--- /dev/null
+++ b/ios/Shared/Swizzle.swift
@@ -0,0 +1,30 @@
+//
+//  Swizzle.swift
+//  MullvadVPN
+//
+//  Created by pronebird on 28/10/2020.
+//  Copyright © 2020 Mullvad VPN AB. All rights reserved.
+//
+
+import Foundation
+
+@inlinable func swizzleMethod(aClass: AnyClass, originalSelector: Selector, newSelector: Selector) {
+    guard let originalMethod = class_getInstanceMethod(aClass, originalSelector),
+          let newMethod = class_getInstanceMethod(aClass, newSelector) else { return }
+
+    if class_addMethod(
+        aClass,
+        originalSelector,
+        method_getImplementation(newMethod),
+        method_getTypeEncoding(newMethod)
+    ) {
+        class_replaceMethod(
+            aClass,
+            newSelector,
+            method_getImplementation(originalMethod),
+            method_getTypeEncoding(originalMethod)
+        )
+    } else {
+        method_exchangeImplementations(originalMethod, newMethod)
+    }
+}