import Foundation enum KeychainTestSafety {    static let suppressAccessEnvironmentKey = "CODEXBAR_SUPPRESS_TEST_KEYCHAIN_ACCESS"    static let allowAccessEnvironmentKey = "CODEXBAR_ALLOW_TEST_KEYCHAIN_ACCESS"     static func shouldBlockRealKeychainAccess(        processName: String = ProcessInfo.processInfo.processName,        environment: [String: String] = ProcessInfo.processInfo.environment) -> Bool    {        if environment[self.allowAccessEnvironmentKey] == "1" { return false }        if environment[self.suppressAccessEnvironmentKey] == "1" { return true }        if environment[KeychainAccessGate.disableAccessEnvironmentKey] == "1" { return true }        return self.isRunningUnderTests(processName: processName, environment: environment)    }     static func isRunningUnderTests(        processName: String,        environment: [String: String]) -> Bool    {        processName == "swiftpm-testing-helper"            || processName.hasSuffix("PackageTests")            || processName.hasSuffix(".xctest")            || environment["XCTestConfigurationFilePath"] != nil            || environment["XCTestBundlePath"] != nil            || environment["XCTestSessionIdentifier"] != nil            || environment["TESTING_LIBRARY_VERSION"] != nil            || environment["SWIFT_TESTING"] != nil            || environment["SWIFT_TESTING_ENABLED"] != nil    }} #if os(macOS)import Security /// The only first-party entry point for Security.framework item operations./// Test processes fail closed before touching the user's Keychain, even when a test enables/// higher-level Keychain logic with `KeychainAccessGate.withTaskOverrideForTesting(false)`.public enum KeychainSecurity {    public static func copyMatching(        _ query: CFDictionary,        _ result: UnsafeMutablePointer<CFTypeRef?>?) -> OSStatus    {        guard !KeychainTestSafety.shouldBlockRealKeychainAccess() else {            return errSecInteractionNotAllowed        }        return SecItemCopyMatching(query, result)    }     public static func update(_ query: CFDictionary, _ attributesToUpdate: CFDictionary) -> OSStatus {        guard !KeychainTestSafety.shouldBlockRealKeychainAccess() else {            return errSecInteractionNotAllowed        }        return SecItemUpdate(query, attributesToUpdate)    }     public static func add(        _ attributes: CFDictionary,        _ result: UnsafeMutablePointer<CFTypeRef?>?) -> OSStatus    {        guard !KeychainTestSafety.shouldBlockRealKeychainAccess() else {            return errSecInteractionNotAllowed        }        return SecItemAdd(attributes, result)    }     public static func delete(_ query: CFDictionary) -> OSStatus {        guard !KeychainTestSafety.shouldBlockRealKeychainAccess() else {            return errSecInteractionNotAllowed        }        return SecItemDelete(query)    }}#endif