/
ReactorTests.swift
334 lines (294 loc) · 9.24 KB
/
ReactorTests.swift
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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", "transformedState"])
}
}
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", "transformedState"])
}
func testCurrentState_stateIsCreatedWhenAccessAction() {
let reactor = TestReactor()
reactor.action.onNext(["action"])
XCTAssertEqual(reactor.currentState, ["action", "transformedAction", "mutation", "transformedMutation", "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)
}
}
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"]
func reduce(state: State, mutation: Mutation) -> State {
return state + mutation
}
// 5. ["action", "transformedAction", "mutation", "transformedMutation"] + ["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
}
}