Feature/home view model test

solutions/devsprint-brq-testes-ios-1/FinanceApp/Modules/Home/HomeViewModel.swift

@@ -21,9 +21,9 @@ struct HomeViewModel {
     weak var delegate: HomeViewModelDelegate?
     private let dispatchQueue: DispatchQueueProtocol
 
-    private let financeService: FinanceServiceProtocol
+    private let financeService: FetchHomeDataProtocol
 
-    init(financeService: FinanceServiceProtocol, dispatchQueue: DispatchQueueProtocol) {
+    init(financeService: FetchHomeDataProtocol, dispatchQueue: DispatchQueueProtocol) {
         self.financeService = financeService
         self.dispatchQueue = dispatchQueue
     }

solutions/devsprint-brq-testes-ios-1/FinanceApp/Service/FinanceService.swift

@@ -7,15 +7,19 @@
 
 import Foundation
 
-protocol FinanceServiceProtocol {
+protocol FinanceServiceProtocol: FetchHomeDataProtocol {
 
-    func fetchHomeData(_ completion: @escaping (HomeData?) -> Void)
     func fetchActivityDetails(_ completion: @escaping (ActivityDetails?) -> Void)
     func fetchContactList(_ completion: @escaping ([Contact]?) -> Void)
     func transferAmount(_ completion: @escaping (TransferResult?) -> Void)
     func fetchUserProfile(_ completion: @escaping (UserProfile?) -> Void)
 }
 
+protocol FetchHomeDataProtocol {
+
+    func fetchHomeData(_ completion: @escaping (HomeData?) -> Void)
+}
+
 class FinanceService: FinanceServiceProtocol {
 
     let networkClient: NetworkClientProtocol

solutions/devsprint-brq-testes-ios-1/FinanceAppTests/HomeViewModelTests.swift

@@ -8,6 +8,55 @@
 import XCTest
 @testable import FinanceApp
 
-class HomeViewModelTests: XCTestCase {
+final class HomeViewModelTests: XCTestCase {
+
+    let dispatchQueueSpy = DispatchQueueSpy()
+    let financeServiceSpy = FinanceServiceSpy()
+    let delegateSpy = HomeViewModelDelegateSpy()
+    lazy var sut = HomeViewModel(financeService: financeServiceSpy, dispatchQueue: dispatchQueueSpy)
+
+    func test_didFetchHomeData_isCalled () {
+        //Given
+        sut.delegate = delegateSpy
+        //When
+        sut.fetchData()
+        //Then
+        XCTAssertTrue(delegateSpy.delegateIsCalled)
+    }
+
+    func test_fetchHomeDataAndDispatchQueue_isCalled() {
+        //when
+        sut.fetchData()
+        //then
+        XCTAssertTrue(financeServiceSpy.fetchHomeDataIsCalled)
+        XCTAssertTrue(dispatchQueueSpy.isDispatchCalled)
+    }
+
+    func test_fetchData_shouldNotCallDelegate_whenHomedataIsNill () {
+        // Given
+        financeServiceSpy.homeData = nil
+        //When
+        sut.fetchData()
+        //Then
+        XCTAssertFalse(dispatchQueueSpy.isDispatchCalled)
+    }
+}
+
+class HomeViewModelDelegateSpy: HomeViewModelDelegate {
+    var delegateIsCalled: Bool = false
+
+    func didFetchHomeData(_ data: FinanceApp.HomeData) {
+        delegateIsCalled = true
+    }
+}
 
+class FinanceServiceSpy: FetchHomeDataProtocol {
+
+    var homeData: HomeData? = HomeData(balance: 0, savings: 0, spending: 0, activity: [Activity(name: "", price: 0, time: "")])
+    var fetchHomeDataIsCalled: Bool = false
+
+    func fetchHomeData(_ completion: @escaping (FinanceApp.HomeData?) -> Void) {
+        fetchHomeDataIsCalled = true
+        completion(homeData)
+    }
 }

solutions/devsprint-brq-testes-ios-1/FinanceAppTests/Test Doubles/DispatchQueueSpy.swift

@@ -5,7 +5,12 @@ import Foundation
 @testable import FinanceApp
 
 public class DispatchQueueSpy: DispatchQueueProtocol {
+
+    var isDispatchCalled: Bool = false
+
     public func async(group: DispatchGroup?, qos: DispatchQoS, flags: DispatchWorkItemFlags, execute work: @escaping @convention(block) () -> Void) {
+        isDispatchCalled = true
         work()
     }
 }
+