TaskViewDataStoreTest.swift

func test_whenContentTypeIsTodayTask_shouldFetchTodayTask() {
     let dataStore = TaskViewDataStoreSpy()
     let sut = TaskViewDefaultPresenter(dataStore: dataStore)
     let contentType = TaskContentType.today
     var presentableTask: PresentableTask?
        
     sut.updateContentType(with: contentType)
     sut.fetchTask(for: contentType) { tasks in
         XCTAssertEqual(tasks.count, 1)
         presentableTask = tasks.first!
     }
        
     dataStore.todayTaskCompletion?([
         TaskModel(title: "Today Task", type: "Urgent", deadline: Date(), color: TaskColorType.blue.color, isCompleted: false)
     ])
        
     XCTAssertTrue(dataStore.fetchTodayTaskCalled)
        
     presentableTask?.selection()
     XCTAssertTrue(dataStore.finishTaskCalled)
}