-
Notifications
You must be signed in to change notification settings - Fork 272
/
ReactorTests.swift
401 lines (351 loc) · 11.1 KB
/
ReactorTests.swift
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
import XCTest
import ReactorKit
import RxExpect
import RxSwift
import RxTest
final class ReactorTests: XCTestCase {
func testEachMethodsAreInvoked() {
let test = RxExpect()
let reactor = test.retain(TestReactor())
test.input(reactor.action, [
.next(100, ["action"]),
])
test.assert(reactor.state) { events in
XCTAssertEqual(events.elements.count, 2)
XCTAssertEqual(events.elements[0], ["transformedState"]) // initial state
XCTAssertEqual(events.elements[1], ["action", "transformedAction", "mutation", "transformedMutation", "reduce", "transformedState"])
}
}
func testReduceIsExecutedRightAfterMutation() {
final class MyReactor: Reactor {
enum Action {
case append([String])
}
enum Mutation {
case setCharacters([String])
}
struct State {
var characters: [String] = []
}
let initialState = State()
func mutate(action: Action) -> Observable<Mutation> {
switch action {
case let .append(characters):
let sources: [Observable<Mutation>] = characters.map { character in
Observable<Mutation>.create { [weak self] observer in
if let self = self {
let newCharacters = self.currentState.characters + [character]
observer.onNext(Mutation.setCharacters(newCharacters))
}
observer.onCompleted()
return Disposables.create()
}
}
return Observable.concat(sources)
}
}
func reduce(state: State, mutation: Mutation) -> State {
var newState = state
switch mutation {
case let .setCharacters(newCharacters):
newState.characters = newCharacters
}
return newState
}
}
let reactor = MyReactor()
reactor.action.onNext(.append(["a", "b"]))
reactor.action.onNext(.append(["c"]))
reactor.action.onNext(.append(["d", "e", "f"]))
XCTAssertEqual(reactor.currentState.characters, ["a", "b", "c", "d", "e", "f"])
}
func testStateReplayCurrentState() {
let test = RxExpect()
let reactor = test.retain(CounterReactor())
let disposable = reactor.state.subscribe() // state: 0
reactor.action.onNext(Void()) // state: 1
reactor.action.onNext(Void()) // state: 2
disposable.dispose()
test.assert(reactor.state) { events in
XCTAssertEqual(events.elements, [2])
}
}
func testCurrentState() {
let reactor = TestReactor()
_ = reactor.state
reactor.action.onNext(["action"])
XCTAssertEqual(reactor.currentState, ["action", "transformedAction", "mutation", "transformedMutation", "reduce", "transformedState"])
}
func testCurrentState_stateIsCreatedWhenAccessAction() {
let reactor = TestReactor()
reactor.action.onNext(["action"])
XCTAssertEqual(reactor.currentState, ["action", "transformedAction", "mutation", "transformedMutation", "reduce", "transformedState"])
}
func testStreamIgnoresErrorFromAction() {
let test = RxExpect()
let reactor = test.retain(CounterReactor())
let action1 = test.scheduler.createHotObservable([
.next(100, Void()),
.next(200, Void()),
.error(300, TestError()),
.next(400, Void()),
])
let action2 = test.scheduler.createHotObservable([
.error(300, TestError()),
.next(500, Void()),
.next(600, Void()),
])
action1.subscribe(reactor.action).disposed(by: test.disposeBag)
action2.subscribe(reactor.action).disposed(by: test.disposeBag)
test.assert(reactor.state) { events in
XCTAssertEqual(events, [
.next(0, 0),
.next(100, 1),
.next(200, 2),
.next(400, 3),
.next(500, 4),
.next(600, 5),
])
}
}
func testStreamIgnoresErrorFromMutate() {
let test = RxExpect()
let reactor = test.retain(CounterReactor())
reactor.stateForTriggerError = 2
test.input(reactor.action, [
.next(100, Void()),
.next(200, Void()),
.next(300, Void()), // error will be emit on this mutate
.next(400, Void()),
.next(500, Void()),
])
test.assert(reactor.state) { events in
XCTAssertEqual(events.elements, [0, 1, 2, 3, 4, 5])
}
}
func testStreamIgnoresCompletedFromAction() {
let test = RxExpect()
let reactor = test.retain(CounterReactor())
let action1 = test.scheduler.createHotObservable([
.next(100, Void()),
.next(200, Void()),
.completed(300),
.next(400, Void()),
])
let action2 = test.scheduler.createHotObservable([
.completed(300),
.next(500, Void()),
.next(600, Void()),
])
action1.subscribe(reactor.action).disposed(by: test.disposeBag)
action2.subscribe(reactor.action).disposed(by: test.disposeBag)
test.assert(reactor.state) { events in
XCTAssertEqual(events, [
.next(0, 0),
.next(100, 1),
.next(200, 2),
.next(400, 3),
.next(500, 4),
.next(600, 5),
])
}
}
func testStreamIgnoresCompletedFromMutate() {
let test = RxExpect()
let reactor = test.retain(CounterReactor())
reactor.stateForTriggerCompleted = 2
test.input(reactor.action, [
.next(100, Void()),
.next(200, Void()),
.next(300, Void()), // completed will be emit on this mutate
.next(400, Void()),
.next(500, Void()),
])
test.assert(reactor.state) { events in
XCTAssertEqual(events.elements, [0, 1, 2, 3, 4, 5])
}
}
func testCancel() {
let test = RxExpect()
let reactor = test.retain(StopwatchReactor(scheduler: test.scheduler))
test.input(reactor.action, [
.next(1, .start),
.next(5, .stop),
.next(6, .start),
.next(9, .stop),
])
test.assert(reactor.state) { events in
XCTAssertEqual(events.elements, [
0, // 0
// 1 (start)
1, // 2
2, // 3
3, // 4
// 5 (stop)
// 6 (start)
4, // 7
5, // 8
// 9 (stop)
])
}
}
func testStub_actionAndStateMemoryAddress() {
let reactor = TestReactor()
reactor.isStubEnabled = true
XCTAssertTrue(reactor.action === reactor.stub.action)
XCTAssertTrue(reactor.state === reactor.stub.state.asObservable())
}
func testStub_actions() {
let reactor = StopwatchReactor(scheduler: MainScheduler.instance)
reactor.isStubEnabled = true
reactor.action.onNext(.start)
reactor.action.onNext(.start)
reactor.action.onNext(.stop)
XCTAssertEqual(reactor.stub.actions, [.start, .start, .stop])
}
func testStub_state() {
let reactor = StopwatchReactor(scheduler: MainScheduler.instance)
reactor.isStubEnabled = true
reactor.stub.state.value = 0
XCTAssertEqual(reactor.currentState, 0)
reactor.stub.state.value = 1
XCTAssertEqual(reactor.currentState, 1)
reactor.stub.state.value = -10
XCTAssertEqual(reactor.currentState, -10)
reactor.stub.state.value = 30
XCTAssertEqual(reactor.currentState, 30)
}
func testStub_ignoreAction() {
let reactor = TestReactor()
reactor.isStubEnabled = true
reactor.action.onNext(["A"])
XCTAssertEqual(reactor.currentState, [])
}
/// A test for #30
func testGenericSubclassing() {
class ParentReactor<T>: Reactor {
enum Action {}
typealias Mutation = Void
typealias State = Void
let initialState: State = State()
}
class ChildReactor: ParentReactor<String> {
}
let reactor = ChildReactor()
let address1 = ObjectIdentifier(reactor.action).hashValue
_ = reactor.state
let address2 = ObjectIdentifier(reactor.action).hashValue
XCTAssertEqual(address1, address2)
}
func testGenericSubclassing_stateIsCreatedWhenAccessAction() {
class ParentReactor<T>: Reactor {
enum Action {
case foo
}
typealias Mutation = Void
typealias State = Int
let initialState: State = 0
func mutate(action: Action) -> Observable<Mutation> {
return .just(Void())
}
func reduce(state: State, mutation: Mutation) -> State {
return state + 1
}
}
class ChildReactor: ParentReactor<String> {
}
let reactor = ChildReactor()
XCTAssertEqual(reactor.currentState, 0)
reactor.action.onNext(.foo)
XCTAssertEqual(reactor.currentState, 1)
}
func testDispose() {
weak var weakReactor: TestReactor?
weak var weakAction: ActionSubject<TestReactor.Action>?
weak var weakState: Observable<TestReactor.State>?
_ = {
let reactor = TestReactor()
weakReactor = reactor
weakAction = reactor.action
weakState = reactor.state
}()
XCTAssertNil(weakReactor)
XCTAssertNil(weakAction)
XCTAssertNil(weakState)
}
}
struct TestError: Error {
}
private final class TestReactor: Reactor {
typealias Action = [String]
typealias Mutation = [String]
typealias State = [String]
let initialState = State()
// 1. ["action"] + ["transformedAction"]
func transform(action: Observable<Action>) -> Observable<Action> {
return action.map { action in action + ["transformedAction"] }
}
// 2. ["action", "transformedAction"] + ["mutation"]
func mutate(action: Action) -> Observable<Mutation> {
return .just(action + ["mutation"])
}
// 3. ["action", "transformedAction", "mutation"] + ["transformedMutation"]
func transform(mutation: Observable<Mutation>) -> Observable<Mutation> {
return mutation.map { $0 + ["transformedMutation"] }
}
// 4. [] + ["action", "transformedAction", "mutation", "transformedMutation"] + ["reduce"]
func reduce(state: State, mutation: Mutation) -> State {
return state + mutation + ["reduce"]
}
// 5. ["action", "transformedAction", "mutation", "transformedMutation", "reduce"] + ["transformedState"]
func transform(state: Observable<State>) -> Observable<State> {
return state.map { $0 + ["transformedState"] }
}
}
private final class StopwatchReactor: Reactor {
enum Action {
case start
case stop
}
typealias Mutation = Int
typealias State = Int
private let scheduler: SchedulerType
let initialState = 0
init(scheduler: SchedulerType) {
self.scheduler = scheduler
}
func mutate(action: Action) -> Observable<Mutation> {
switch action {
case .start:
let stopAction = self.action.filter { $0 == .stop }
return Observable<Int>.interval(.seconds(1), scheduler: self.scheduler)
.map { _ in 1 }
.takeUntil(stopAction)
case .stop:
return .empty()
}
}
func reduce(state: State, mutation: Mutation) -> State {
return state + mutation
}
}
private final class CounterReactor: Reactor {
typealias Action = Void
typealias Mutation = Void
typealias State = Int
let initialState = 0
var stateForTriggerError: State?
var stateForTriggerCompleted: State?
func mutate(action: Void) -> Observable<Void> {
if self.currentState == self.stateForTriggerError {
return Observable.concat(.just(action), .error(TestError()))
} else if self.currentState == self.stateForTriggerCompleted {
return Observable.concat(.just(action), .empty())
} else {
return .just(action)
}
}
func reduce(state: State, mutation: Mutation) -> State {
return state + 1
}
}