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//
// ImageSearchSpec.swift
// SwinjectMVVMExample
//
// Created by Yoichi Tagaya on 8/22/15.
// Copyright © 2015 Swinject Contributors. All rights reserved.
//
import Quick
import Nimble
import ReactiveSwift
import Result
@testable import ExampleModel
class ImageSearchSpec: QuickSpec {
// MARK: Stub
class GoodStubNetwork: Networking {
func requestJSON(_ url: String, parameters: [String : AnyObject]?) -> SignalProducer<Any, NetworkError> {
var imageJSON0 = imageJSON
imageJSON0["id"] = 0
var imageJSON1 = imageJSON
imageJSON1["id"] = 1
let json: [String: Any] = [
"totalHits": 123,
"hits": [imageJSON0, imageJSON1]
]
return SignalProducer { observer, disposable in
observer.send(value: json)
observer.sendCompleted()
}
.observe(on: QueueScheduler())
}
func requestImage(_ url: String) -> SignalProducer<UIImage, NetworkError> {
return SignalProducer.empty
}
}
class BadStubNetwork: Networking {
func requestJSON(_ url: String, parameters: [String : AnyObject]?) -> SignalProducer<Any, NetworkError> {
let json = [String: AnyObject]()
return SignalProducer { observer, disposable in
observer.send(value: json)
observer.sendCompleted()
}
.observe(on: QueueScheduler())
}
func requestImage(_ url: String) -> SignalProducer<UIImage, NetworkError> {
return SignalProducer.empty
}
}
class ErrorStubNetwork: Networking {
func requestJSON(_ url: String, parameters: [String : AnyObject]?) -> SignalProducer<Any, NetworkError> {
return SignalProducer { observer, disposable in
observer.send(error: .NotConnectedToInternet)
}
.observe(on: QueueScheduler())
}
func requestImage(_ url: String) -> SignalProducer<UIImage, NetworkError> {
return SignalProducer.empty
}
}
class CountConfigurableStubNetwork: Networking {
var imageCountToEmit = 100
func requestJSON(_ url: String, parameters: [String : AnyObject]?) -> SignalProducer<Any, NetworkError> {
func createImageJSON(id: Int) -> [String: Any] {
var json = imageJSON
json["id"] = id
return json
}
let json: [String: Any] = [
"totalHits": 150,
"hits": (0..<imageCountToEmit).map { createImageJSON(id: $0) }
]
return SignalProducer { observer, disposable in
observer.send(value: json)
observer.sendCompleted()
}.observe(on: QueueScheduler())
}
func requestImage(_ url: String) -> SignalProducer<UIImage, NetworkError> {
return SignalProducer.empty
}
}
// MARK: - Mock
class MockNetwork: Networking {
var passedParameters: [String : AnyObject]?
func requestJSON(_ url: String, parameters: [String : AnyObject]?) -> SignalProducer<Any, NetworkError> {
passedParameters = parameters
return SignalProducer.empty
}
func requestImage(_ url: String) -> SignalProducer<UIImage, NetworkError> {
return SignalProducer.empty
}
}
// MARK: - Spec
override func spec() {
describe("Response") {
it("returns images if the network works correctly.") {
var response: ResponseEntity? = nil
let search = ImageSearch(network: GoodStubNetwork())
search.searchImages(nextPageTrigger: SignalProducer.empty)
.on(value: { response = $0 })
.start()
expect(response).toEventuallyNot(beNil())
expect(response?.totalCount).toEventually(equal(123))
expect(response?.images.count).toEventually(equal(2))
expect(response?.images[0].id).toEventually(equal(0))
expect(response?.images[1].id).toEventually(equal(1))
}
it("sends an error if the network returns incorrect data.") {
var error: NetworkError? = nil
let search = ImageSearch(network: BadStubNetwork())
search.searchImages(nextPageTrigger: SignalProducer.empty)
.on(failed: { error = $0 })
.start()
expect(error).toEventually(equal(NetworkError.IncorrectDataReturned))
}
it("passes the error sent by the network.") {
var error: NetworkError? = nil
let search = ImageSearch(network: ErrorStubNetwork())
search.searchImages(nextPageTrigger: SignalProducer.empty)
.on(failed: { error = $0 })
.start()
expect(error).toEventually(equal(NetworkError.NotConnectedToInternet))
}
}
describe("Pagination") {
describe("page parameter") {
var mockNetwork: MockNetwork!
var search: ImageSearch!
beforeEach {
mockNetwork = MockNetwork()
search = ImageSearch(network: mockNetwork)
}
it("sets page to 1 at the beginning.") {
search.searchImages(nextPageTrigger: SignalProducer.empty).start()
expect(mockNetwork.passedParameters?["page"] as? Int).toEventually(equal(1))
}
it("increments page by nextPageTrigger") {
let trigger = SignalProducer<(), NoError>(value: ()) // Trigger once.
search.searchImages(nextPageTrigger: trigger).start()
expect(mockNetwork.passedParameters?["page"] as? Int).toEventually(equal(2))
}
}
describe("completed event") {
var network: CountConfigurableStubNetwork!
var search: ImageSearch!
var nextPageTrigger: MutableProperty<Void>! // SignalProducer buffer
beforeEach {
network = CountConfigurableStubNetwork()
search = ImageSearch(network: network)
nextPageTrigger = MutableProperty()
}
it("sends completed when newly found images are less than the max number of images per page.") {
var completedCalled = false
network.imageCountToEmit = Pixabay.maxImagesPerPage
search.searchImages(nextPageTrigger: nextPageTrigger.producer.skip(first: 1))
.on(completed: { completedCalled = true })
.start()
nextPageTrigger.value = () // Emits `maxImagesPerPage` (50) images, which mean more images possibly exit.
network.imageCountToEmit = Pixabay.maxImagesPerPage - 1
nextPageTrigger.value = () // Emits only 49, which mean no more images exist.
expect(completedCalled).toEventually(beTrue(), timeout: 2)
}
it("sends completed when total loaded images are equal to the total number of images specified by the response.") {
var completedCalled = false
network.imageCountToEmit = Pixabay.maxImagesPerPage
search.searchImages(nextPageTrigger: nextPageTrigger.producer.skip(first: 1))
.on(completed: { completedCalled = true })
.start() // Will emit `maxImagesPerPage` (50) images.
nextPageTrigger.value = () // Will emit `maxImagesPerPage` (50) images.
nextPageTrigger.value = () // Will emit `maxImagesPerPage` (50) images, and reach the toal number (150).
expect(completedCalled).toEventually(beTrue())
}
it("does not send completed otherwise.") {
var completedCalled = false
network.imageCountToEmit = Pixabay.maxImagesPerPage
search.searchImages(nextPageTrigger: nextPageTrigger.producer.skip(first: 1))
.on(completed: { completedCalled = true })
.start() // Will emit `maxImagesPerPage` (50) images.
nextPageTrigger.value = () // Will emit `maxImagesPerPage` (50) images, and still not reach the total number (150).
expect(completedCalled).toEventuallyNot(beTrue())
}
}
}
}
}