What are mocking and stubbing techniques for Keychain in Swift?

In Swift, mocking and stubbing techniques for the Keychain are used in unit tests to simulate behaviors of the Keychain service without requiring actual secure storage. This helps in isolating tests and provides controlled scenarios for verifying functionality.
Mocking, Stubbing, Keychain, Swift, Unit Testing, iOS Development
// Example of mocking Keychain in a unit test import XCTest @testable import YourApp class KeychainServiceMock: KeychainServiceProtocol { var keychainValues = [String: String]() func save(_ data: String, for key: String) -> Bool { keychainValues[key] = data return true } func retrieve(for key: String) -> String? { return keychainValues[key] } func delete(for key: String) -> Bool { keychainValues.removeValue(forKey: key) return true } } class KeychainTests: XCTestCase { var keychainMock: KeychainServiceMock! override func setUp() { super.setUp() keychainMock = KeychainServiceMock() } func testSaveAndRetrieve() { keychainMock.save("testValue", for: "testKey") let retrievedValue = keychainMock.retrieve(for: "testKey") XCTAssertEqual(retrievedValue, "testValue") } func testDelete() { keychainMock.save("testValue", for: "testKey") keychainMock.delete(for: "testKey") let retrievedValue = keychainMock.retrieve(for: "testKey") XCTAssertNil(retrievedValue) } }

Mocking Stubbing Keychain Swift Unit Testing iOS Development

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