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Merge pull request sergdort#20 from vadimue/feature/postsTests
Add tests for PostsViewModel
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36 changes: 0 additions & 36 deletions
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CleanArchitectureRxSwiftTests/CleanArchitectureRxSwiftTests.swift
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CleanArchitectureRxSwiftTests/Scenes/AllPosts/AllPostsUseCaseMock.swift
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,14 @@ | ||
| @testable import CleanArchitectureRxSwift | ||
| import RxSwift | ||
| import Domain | ||
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| class AllPostsUseCaseMock: Domain.AllPostsUseCase { | ||
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| var posts_ReturnValue: Observable<[Post]> = Observable.just([]) | ||
| var posts_Called = false | ||
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| func posts() -> Observable<[Post]> { | ||
| posts_Called = true | ||
| return posts_ReturnValue | ||
| } | ||
| } |
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CleanArchitectureRxSwiftTests/Scenes/AllPosts/PostsNavigatorMock.swift
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,27 @@ | ||
| @testable import CleanArchitectureRxSwift | ||
| import Domain | ||
| import RxSwift | ||
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| class PostNavigatorMock: PostsNavigator { | ||
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| var toPosts_Called = false | ||
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| func toPosts() { | ||
| toPosts_Called = true | ||
| } | ||
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| var toCreatePost_Called = false | ||
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| func toCreatePost() { | ||
| toCreatePost_Called = true | ||
| } | ||
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| var toPost_post_Called = false | ||
| var toPost_post_ReceivedArguments: Post? | ||
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| func toPost(_ post: Post) { | ||
| toPost_post_Called = true | ||
| toPost_post_ReceivedArguments = post | ||
| } | ||
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| } |
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CleanArchitectureRxSwiftTests/Scenes/AllPosts/PostsViewModelTests.swift
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,144 @@ | ||
| @testable import CleanArchitectureRxSwift | ||
| import Domain | ||
| import XCTest | ||
| import RxSwift | ||
| import RxCocoa | ||
| import RxBlocking | ||
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| enum TestError: Error { | ||
| case test | ||
| } | ||
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| class PostsViewModelTests: XCTestCase { | ||
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| var allPostUseCase: AllPostsUseCaseMock! | ||
| var postsNavigator: PostNavigatorMock! | ||
| var viewModel: PostsViewModel! | ||
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| let disposeBag = DisposeBag() | ||
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| override func setUp() { | ||
| super.setUp() | ||
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| allPostUseCase = AllPostsUseCaseMock() | ||
| postsNavigator = PostNavigatorMock() | ||
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| viewModel = PostsViewModel(useCase: allPostUseCase, | ||
| navigator: postsNavigator) | ||
| } | ||
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| func test_transform_triggerInvoked_postEmited() { | ||
| // arrange | ||
| let trigger = PublishSubject<Void>() | ||
| let input = createInput(trigger: trigger) | ||
| let output = viewModel.transform(input: input) | ||
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| // act | ||
| output.posts.drive().disposed(by: disposeBag) | ||
| trigger.onNext() | ||
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| // assert | ||
| XCTAssert(allPostUseCase.posts_Called) | ||
| } | ||
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| func test_transform_sendPost_trackFetching() { | ||
| // arrange | ||
| let trigger = PublishSubject<Void>() | ||
| let output = viewModel.transform(input: createInput(trigger: trigger)) | ||
| let expectedFetching = [true, false] | ||
| var actualFetching: [Bool] = [] | ||
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| // act | ||
| output.fetching | ||
| .do(onNext: { actualFetching.append($0) }, | ||
| onSubscribe: { actualFetching.append(true) }) | ||
| .drive() | ||
| .disposed(by: disposeBag) | ||
| trigger.onNext() | ||
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| // assert | ||
| XCTAssertEqual(actualFetching, expectedFetching) | ||
| } | ||
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| func test_transform_postEmitError_trackError() { | ||
| // arrange | ||
| let trigger = PublishSubject<Void>() | ||
| let output = viewModel.transform(input: createInput(trigger: trigger)) | ||
| allPostUseCase.posts_ReturnValue = Observable.error(TestError.test) | ||
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| // act | ||
| output.posts.drive().disposed(by: disposeBag) | ||
| output.error.drive().disposed(by: disposeBag) | ||
| trigger.onNext() | ||
| let error = try! output.error.toBlocking().first() | ||
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| // assert | ||
| XCTAssertNotNil(error) | ||
| } | ||
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| func test_transform_triggerInvoked_mapPostsToViewModels() { | ||
| // arrange | ||
| let trigger = PublishSubject<Void>() | ||
| let output = viewModel.transform(input: createInput(trigger: trigger)) | ||
| allPostUseCase.posts_ReturnValue = Observable.just(createPosts()) | ||
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| // act | ||
| output.posts.drive().disposed(by: disposeBag) | ||
| trigger.onNext() | ||
| let posts = try! output.posts.toBlocking().first()! | ||
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| // assert | ||
| XCTAssertEqual(posts.count, 2) | ||
| } | ||
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| func test_transform_selectedPostInvoked_navigateToPost() { | ||
| // arrange | ||
| let select = PublishSubject<IndexPath>() | ||
| let output = viewModel.transform(input: createInput(selection: select)) | ||
| let posts = createPosts() | ||
| allPostUseCase.posts_ReturnValue = Observable.just(posts) | ||
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| // act | ||
| output.posts.drive().disposed(by: disposeBag) | ||
| output.selectedPost.drive().disposed(by: disposeBag) | ||
| select.onNext(IndexPath(row: 1, section: 0)) | ||
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| // assert | ||
| XCTAssertTrue(postsNavigator.toPost_post_Called) | ||
| XCTAssertEqual(postsNavigator.toPost_post_ReceivedArguments, posts[1]) | ||
| } | ||
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| func test_transform_createPostInvoked_navigateToCreatePost() { | ||
| // arrange | ||
| let create = PublishSubject<Void>() | ||
| let output = viewModel.transform(input: createInput(createPostTrigger: create)) | ||
| let posts = createPosts() | ||
| allPostUseCase.posts_ReturnValue = Observable.just(posts) | ||
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| // act | ||
| output.posts.drive().disposed(by: disposeBag) | ||
| output.createPost.drive().disposed(by: disposeBag) | ||
| create.onNext() | ||
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| // assert | ||
| XCTAssertTrue(postsNavigator.toCreatePost_Called) | ||
| } | ||
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| private func createInput(trigger: Observable<Void> = Observable.just(), | ||
| createPostTrigger: Observable<Void> = Observable.never(), | ||
| selection: Observable<IndexPath> = Observable.never()) | ||
| -> PostsViewModel.Input { | ||
| return PostsViewModel.Input( | ||
| trigger: trigger.asDriverOnErrorJustComplete(), | ||
| createPostTrigger: createPostTrigger.asDriverOnErrorJustComplete(), | ||
| selection: selection.asDriverOnErrorJustComplete()) | ||
| } | ||
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| private func createPosts() -> [Post] { | ||
| return [ | ||
| Post(body: "body 1", title: "title 1", uid: "uid 1", userId: "userId 1"), | ||
| Post(body: "body 2", title: "title 2", uid: "uid 2", userId: "userId 2") | ||
| ] | ||
| } | ||
| } |