FetchRecipeDetailUseCaseTests를 생성하였습니다

HomeCafeRecipes/HomeCafeRecipes/Domain/Entities/Recipe.swift

@@ -18,3 +18,25 @@ struct Recipe {
     let likeCount: Int
     let createdAt: Date
 }
+
+extension Recipe {
+
+    static func dummyRecipe() -> Recipe {
+        .init(
+            id: 1,
+            type: .coffee,
+            name: "",
+            description: "",
+            writer: .init(
+                id: 1,
+                profileImage: "",
+                nickname: "",
+                createdAt: Date()
+            ),
+            imageUrls: [],
+            isLikedByCurrentUser: false,
+            likeCount: 0,
+            createdAt: Date()
+        )
+    }
+}

HomeCafeRecipes/HomeCafeRecipesTests/FetchRecipeDetailUseCaseTests.swift

@@ -0,0 +1,125 @@
+//
+//  FetchRecipeDetailUseCaseTests.swift
+//  HomeCafeRecipesTests
+//
+//  Created by 김건호 on 7/17/24.
+//
+
+import Foundation
+import XCTest
+
+import RxSwift
+
+@testable
+import HomeCafeRecipes
+
+final class FetchRecipeDetailUseCaseTests: XCTestCase {
+
+    var fetchRecipeDetailRepository: FetchRecipeRepositoryMock!
+    var disposeBag: DisposeBag!
+
+    final class FetchRecipeRepositoryMock: RecipeDetailRepository {
+        var fetchRecipeDetailCallCount: Int = 0
+        var fetchRecipeDetailStub: Single<Recipe> = .just(Recipe.dummyRecipe())
+        func fetchRecipeDetail(recipeID: Int) -> Single<Recipe> {
+            fetchRecipeDetailCallCount += 1
+            return fetchRecipeDetailStub
+        }
+    }
+
+    func createUseCase() -> FetchRecipeDetailUseCase {
+        let usecase = FetchRecipeDetailUseCaseImpl(
+            repository: fetchRecipeDetailRepository
+        )
+        return usecase
+    }
+
+    override func setUpWithError() throws {
+        fetchRecipeDetailRepository = .init()
+        disposeBag = .init()
+    }
+}
+
+extension FetchRecipeDetailUseCaseTests {
+
+    func test_execute를_호출하면_RecipeDetailRepository의_fetchRecipeDetail을_호출합니다(){
+
+        // Given
+
+        let usecase = createUseCase()
+        fetchRecipeDetailRepository.fetchRecipeDetailStub = .just(Recipe.dummyRecipe())
+
+        // When
+
+        usecase.execute(recipeID: 1)
+            .subscribe()
+            .disposed(by: disposeBag)
+
+        // Then
+
+        XCTAssertEqual(fetchRecipeDetailRepository.fetchRecipeDetailCallCount, 1)
+    }
+
+    func test_RecipeDetailRepository의_성공응답이오면_Recipe를_반환합니다(){
+
+        // Given
+
+        let usecase = createUseCase()
+        let recipe = Recipe.dummyRecipe()
+        fetchRecipeDetailRepository.fetchRecipeDetailStub = .just(recipe)
+        let expectation = self.expectation(description: "Fetch Recipe Success")
+
+        // When
+
+        usecase.execute(recipeID: 1)
+            .subscribe(onSuccess: { result in
+                if case .success(let fetchedRecipe) = result {
+                    // Then
+
+                    XCTAssertEqual(fetchedRecipe.id, recipe.id)
+                    expectation.fulfill()
+                } else {
+                    XCTFail("Expected success but got failure")
+                }
+            }, onFailure: { error in
+                XCTFail("Expected success but got error: \(error)")
+            })
+            .disposed(by: disposeBag)
+
+        wait(for: [expectation], timeout: 1.0)
+        XCTAssertEqual(fetchRecipeDetailRepository.fetchRecipeDetailCallCount, 1)
+    }
+
+    func test_RecipeDetailRepository의_실패응답이오면_Error를_반환합니다() {
+
+        // Given
+
+        let usecase = createUseCase()
+        let error = NSError(domain: "TestError", code: -1)
+        fetchRecipeDetailRepository.fetchRecipeDetailStub = .error(error)
+        let expectation = self.expectation(description: "Fetch Recipe Failure")
+
+        // When
+
+        usecase.execute(recipeID: 1)
+            .subscribe(onSuccess: { result in
+                if case .failure(let receivedError as NSError) = result {
+                    // Then
+
+                    XCTAssertEqual(receivedError.domain, error.domain)
+                    XCTAssertEqual(receivedError.code, error.code)
+                    expectation.fulfill()
+                } else {
+                    XCTFail("Expected failure but got success")
+                }
+            }, onFailure: { error in
+                XCTFail("Expected failure but got error: \(error)")
+            })
+            .disposed(by: disposeBag)
+
+        wait(for: [expectation], timeout: 1.0)
+        XCTAssertEqual(fetchRecipeDetailRepository.fetchRecipeDetailCallCount, 1)
+
+    }
+
+}

HomeCafeRecipes/HomeCafeRecipesTests/RecipeDeatilInteractorTests.swift

@@ -0,0 +1,111 @@
+//
+//  RecipeDeatilInteractorTests.swift
+//  HomeCafeRecipesTests
+//
+//  Created by 김건호 on 7/9/24.
+//
+
+import Foundation
+import XCTest
+
+import RxSwift
+
+@testable
+import HomeCafeRecipes
+
+final class RecipeDetailInteractorTests: XCTestCase {
+    var fetchRecipeDetailUsecase: FetchRecipeDetailUseCaseMock!
+    var delegate: RecipeDetailInteractorDelegateMock!
+
+    final class FetchRecipeDetailUseCaseMock: FetchRecipeDetailUseCase {
+        var executeCallCount: Int = 0
+        var executeStub: Single<Result<Recipe, Error>> = .just(.failure(NSError()))
+        func execute(recipeID: Int) -> Single<Result<Recipe, Error>> {
+            executeCallCount += 1
+            return executeStub
+        }
+    }
+
+    final class RecipeDetailInteractorDelegateMock: RecipeDetailInteractorDelegate {
+        var fetchedCallCount: Int = 0
+        var fetchedRecipeResult: Result<Recipe, Error>?
+        func fetchedRecipe(result: Result<Recipe, Error>) {
+            fetchedCallCount += 1
+            fetchedRecipeResult = result
+        }
+    }
+
+    func createInteractor(recipeID: Int = 0) -> RecipeDetailInteractor {
+        let interactor = RecipeDetailInteractorImpl(
+            fetchRecipeDetailUseCase: fetchRecipeDetailUsecase,
+            recipeID: recipeID
+        )
+
+        interactor.delegate = delegate
+        return interactor
+    }
+
+    override func setUpWithError() throws {
+        fetchRecipeDetailUsecase = .init()
+        delegate = .init()
+    }
+}
+
+// MARK: viewDidLoad
+
+extension RecipeDetailInteractorTests {
+
+    func test_화면이_로드될때_FetchRecipeDetailUsecase를_호출합니다() {
+        // given
+        let interactor = createInteractor()
+
+        // when
+        interactor.viewDidLoad()
+
+        // then
+        XCTAssertEqual(self.fetchRecipeDetailUsecase.executeCallCount, 1)
+    }
+
+    func test_FetchRecipeDetailUsecase의_성공응답이오면_Delegate로_성공을_전달합니다() {
+        // given
+        let interactor = createInteractor()
+        let recipe = Recipe.dummyRecipe()
+        fetchRecipeDetailUsecase.executeStub = .just(.success(recipe))
+
+        // when
+        interactor.viewDidLoad()
+
+        // then
+        XCTAssertEqual(self.fetchRecipeDetailUsecase.executeCallCount, 1)
+        XCTAssertEqual(self.delegate.fetchedCallCount, 1)
+
+        if case .success(let fetchedRecipe)? = delegate.fetchedRecipeResult {
+            XCTAssertEqual(fetchedRecipe.id, recipe.id)
+        } else {
+            XCTFail("Expected success but got failure or nil")
+        }
+    }
+
+    func test_FetchRecipeDetailUsecase의_실패응답이오면_Delegate로_실패를_전달합니다() {
+
+        // given
+        let interactor = createInteractor()
+        let error = NSError(domain: "TestError", code: -1)
+        fetchRecipeDetailUsecase.executeStub = .just(.failure(error))
+
+        // when
+        interactor.viewDidLoad()
+
+        // then
+        XCTAssertEqual(self.fetchRecipeDetailUsecase.executeCallCount, 1)
+        XCTAssertEqual(self.delegate.fetchedCallCount, 1)
+
+        if case .failure(let fetchedError as NSError) = delegate.fetchedRecipeResult {
+            XCTAssertEqual(fetchedError.domain, error.domain)
+            XCTAssertEqual(fetchedError.code, error.code)
+        } else {
+            XCTFail("Expected success but got failure or nil")
+        }
+
+    }
+}