UserDefaults.swift

// Combine app + shared defaults into one
extension UserDefaults {
  static var shared: UserDefaults {
    let combined = UserDefaults.standard
    combined.addSuite(named: "com.schnaub.app")
    return combined
  }
}

// Unit test instance that clears all values before the test is run
extension UserDefaults {
  static func makeClearedInstance(for functionName: StaticString = #function,
                                  inFile fileName: StaticString = #file) -> UserDefaults {
    let className = "\(fileName)".split(separator: ".")[0]
    let testName = "\(functionName)".split(separator: "(")[0]
    let suiteName = "com.schnaub.text.\(className).\(testName)"

    let defaults = self.init(suiteName: suiteName)!
    defaults.removePersistentDomain(forName: suiteName)
    return defaults
  }
}