Type we want to test

struct Player {
    var name: String
    var age: String
    var address: String
    var wins: Int
    var losses: Int

    var hasWinningRecord: Bool {
        return wins > losses
    }
}

Create a helper function to wrap the initializer of the type above. Set a default value for all of the properties.

func createPlayer(
    name: String = "John",
    age: String = "Snow",
    address: String = "Beyond the Wall",
    wins: Int = 10,
    losses: Int = 0
    ) -> Player {

    return Player(name: name, age: age, address: address, wins: wins, losses: losses)
}

Use the helper function to create your test data. Since there are already default values, we only need to set the properties that we care about in the specific test we're working on.

// Test #1 - Is name set?
let player1 = createPlayer(name: "Karlo")
pass(player1.name == "Karlo")



// Test #2 - hasWinningRecord is set correctly

// #2a
let player2 = createPlayer(wins: 1, losses: 0)
pass(player2.hasWinningRecord == true)

// #2b
let player3 = createPlayer(wins: 0, losses: 1)
pass(player3.hasWinningRecord == false)

// #2c
let player4 = createPlayer(wins: 1, losses: 1)
pass(player4.hasWinningRecord == false)