Testing template for Business Logic.

Tests.swift

import XCTest
@testable import "DROP YOUR APP TARGET HERE"

class Tests: XCTestCase {

  var sut: "DROP YOUR CLASS THAT YOU WANT TO TEST"!

  override func setUp() {
    super.setUp()
    sut = "DROP YOUR CLASS THAT YOU WANT TO TEST"()
  }

  override func tearDown() {
    sut = nil
    super.tearDown()
  }

  // MARK: - Given
  func givenSomeProgress() {
    sut.distance = 10
  }

  // MARK: - Lifecycle

  func testModel_whenRestarted_distanceIsCleared() {
    // given
    givenSomeProgress()

    // when
    sut.restart()

    // then
    XCTAssertEqual(sut.distance, 0)
  }
  
}

Updated for Swift 5.1 💎