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Added some tests for Shared State case study. (#262)
* Added some tests for Shared State case study. * Expanded upon tests by also validating that state is mirrored State is expected to be mirrored (or shared) between the Counter and Profile - the tests have been updated to verify this. * Modified tests to focus more on what is changing between steps Co-authored-by: Noah McCann <>
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‎Examples/CaseStudies/CaseStudies.xcodeproj/project.pbxproj

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‎Examples/CaseStudies/SwiftUICaseStudies/01-GettingStarted-SharedState.swift

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}
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}
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enum SharedStateAction {
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enum SharedStateAction: Equatable {
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case counter(CounterAction)
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case profile(ProfileAction)
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case selectTab(SharedState.Tab)
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enum CounterAction {
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enum CounterAction: Equatable {
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case alertDismissed
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case decrementButtonTapped
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case incrementButtonTapped
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case isPrimeButtonTapped
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}
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enum ProfileAction {
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enum ProfileAction: Equatable {
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case resetCounterButtonTapped
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}
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}

‎Examples/CaseStudies/SwiftUICaseStudiesTests/01-GettingStarted-SharedStateTests.swift

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import Combine
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import ComposableArchitecture
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import XCTest
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@testable import SwiftUICaseStudies
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class SharedStateTests: XCTestCase {
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func testTabRestoredOnReset() {
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let store = TestStore(
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initialState: SharedState(),
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reducer: sharedStateReducer,
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environment: ()
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)
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store.assert(
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.send(.selectTab(.profile)) {
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$0.currentTab = .profile
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$0.profile = .init(currentTab: .profile, count: 0, maxCount: 0, minCount: 0, numberOfCounts: 0)
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},
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.send(.profile(.resetCounterButtonTapped)) {
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$0.currentTab = .counter
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$0.profile = .init(currentTab: .counter, count: 0, maxCount: 0, minCount: 0, numberOfCounts: 0)
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})
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}
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func testTabSelection() {
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let store = TestStore(
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initialState: SharedState(),
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reducer: sharedStateReducer,
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environment: ()
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)
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store.assert(
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.send(.selectTab(.profile)) {
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$0.currentTab = .profile
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$0.profile = .init(currentTab: .profile, count: 0, maxCount: 0, minCount: 0, numberOfCounts: 0)
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},
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.send(.selectTab(.counter)) {
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$0.currentTab = .counter
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$0.profile = .init(currentTab: .counter, count: 0, maxCount: 0, minCount: 0, numberOfCounts: 0)
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})
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}
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func testSharedCounts() {
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let store = TestStore(
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initialState: SharedState(),
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reducer: sharedStateReducer,
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environment: ()
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)
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store.assert(
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.send(.counter(.incrementButtonTapped)) {
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$0.counter.count = 1
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$0.counter.maxCount = 1
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$0.counter.numberOfCounts = 1
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},
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.send(.counter(.decrementButtonTapped)) {
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$0.counter.count = 0
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$0.counter.numberOfCounts = 2
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},
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.send(.counter(.decrementButtonTapped)) {
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$0.counter.count = -1
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$0.counter.minCount = -1
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$0.counter.numberOfCounts = 3
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})
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}
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func testIsPrimeWhenPrime() {
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let store = TestStore(
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initialState: SharedState.CounterState(alert: nil, count: 3, maxCount: 0, minCount: 0, numberOfCounts: 0),
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reducer: sharedStateCounterReducer,
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environment: ()
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)
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store.assert(
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.send(.isPrimeButtonTapped) {
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$0.alert = .init(
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title: "👍 The number \($0.count) is prime!"
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)
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},
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.send(.alertDismissed) {
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$0.alert = nil
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}
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)
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}
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func testIsPrimeWhenNotPrime() {
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let store = TestStore(
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initialState: SharedState.CounterState(alert: nil, count: 6, maxCount: 0, minCount: 0, numberOfCounts: 0),
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reducer: sharedStateCounterReducer,
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environment: ()
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)
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store.assert(
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.send(.isPrimeButtonTapped) {
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$0.alert = .init(
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title: "👎 The number \($0.count) is not prime :("
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)
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},
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.send(.alertDismissed) {
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$0.alert = nil
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}
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)
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}
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}

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