swift-composable-architecture-mirror/Examples/CaseStudies/UIKitCaseStudiesTests/UIKitCaseStudiesTests.swift

import ComposableArchitecture
import XCTest

@testable import UIKitCaseStudies

final class UIKitCaseStudiesTests: XCTestCase {
  func testCountDown() {
    let store = TestStore(
      initialState: CounterState(),
      reducer: counterReducer,
      environment: CounterEnvironment()
    )

    store.send(.incrementButtonTapped) {
      $0.count = 1
    }
    store.send(.decrementButtonTapped) {
      $0.count = 0
    }
  }

  func testCountDownList() {
    let firstState = CounterState()
    let secondState = CounterState()
    let thirdState = CounterState()

    let store = TestStore(
      initialState: CounterListState(
        counters: [firstState, secondState, thirdState]
      ),
      reducer: counterListReducer,
      environment: CounterListEnvironment()
    )

    store.send(.counter(id: firstState.id, action: .incrementButtonTapped)) {
      $0.counters[id: firstState.id]?.count = 1
    }
    store.send(.counter(id: firstState.id, action: .decrementButtonTapped)) {
      $0.counters[id: firstState.id]?.count = 0
    }

    store.send(.counter(id: secondState.id, action: .incrementButtonTapped)) {
      $0.counters[id: secondState.id]?.count = 1
    }
    store.send(.counter(id: secondState.id, action: .decrementButtonTapped)) {
      $0.counters[id: secondState.id]?.count = 0
    }

    store.send(.counter(id: thirdState.id, action: .incrementButtonTapped)) {
      $0.counters[id: thirdState.id]?.count = 1
    }
    store.send(.counter(id: thirdState.id, action: .decrementButtonTapped)) {
      $0.counters[id: thirdState.id]?.count = 0
    }
  }
}