/*
 * Copyright (C) 2017. Uber Technologies
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.uber.rib.core

import com.jakewharton.rxrelay2.BehaviorRelay
import com.jakewharton.rxrelay2.Relay
import com.uber.rib.core.internal.CoreFriendModuleApi
import com.uber.rib.core.lifecycle.WorkerEvent
import io.reactivex.observers.TestObserver
import org.junit.Before
import org.junit.Test

class WorkerScopeProviderTest {

  private val lifecycle: Relay<WorkerEvent> = BehaviorRelay.create()
  private lateinit var testObserver: TestObserver<Any>

  @OptIn(CoreFriendModuleApi::class)
  @Before
  fun setUp() {
    testObserver = TestObserver()
    val workerScopeProvider = WorkerScopeProvider(lifecycle.hide())
    workerScopeProvider.requestScope().subscribe(testObserver)
  }

  @Test
  fun byDefaultTestObserve_shouldNotComplete() {
    testObserver.assertNoErrors()
    testObserver.assertNotComplete()
  }

  @Test
  fun whenStartLifecycleEmitted_shouldNotComplete() {
    lifecycle.accept(WorkerEvent.START)
    testObserver.assertNoErrors()
    testObserver.assertNotComplete()
  }

  @Test
  fun whenStartLifecycleEmittedThenStopEventEmitted_shouldComplete() {
    lifecycle.accept(WorkerEvent.START)
    lifecycle.accept(WorkerEvent.STOP)
    testObserver.assertComplete()
    testObserver.assertNoErrors()
  }

  @Test
  fun whenStartLifecycleEmittedThenStartEventEmittedAgain_shouldAlsoComplete() {
    lifecycle.accept(WorkerEvent.START)
    lifecycle.accept(WorkerEvent.START)
    testObserver.assertComplete()
    testObserver.assertNoErrors()
  }
}
