Cocoa Programming for OS X: The Big Nerd Ranch Guide

Creating a Consistent Testing Environment

Next, you will write tests for ScheduleFetcher. To get started, create a new Swift source file in the RanchForecastTests called ScheduleFetcherTests.swift. In the file, add a new class ScheduleFetcherTests, a subclass of XCTestCase.

import Foundation
import XCTest
import RanchForecast

class ScheduleFetcherTests: XCTestCase {

}

Before you can write any tests against ScheduleFetcher, you need to make sure that the class itself is visible from the RanchForecastTests target. You already imported the RanchForecast target into ScheduleFetcherTests.swift, but you still need to mark the class and its initializer public. Edit ScheduleFetcher.swift as follows:

public class ScheduleFetcher { enum ...