busymachines.pureharm.testkit.util.PureharmTestRuntimeLazyConversions.scala Maven / Gradle / Ivy

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/**
  * Copyright (c) 2019 BusyMachines
  *
  * See company homepage at: https://www.busymachines.com/
  *
  * 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 busymachines.pureharm.testkit.util

import busymachines.pureharm.effects._

/**
  * Basically the problem is as such:
  * 1) ideally, you probably want only one [[PureharmTestRuntime]] instantiated in your entire test run
  *    to not waste resources and startup time...
  * 2) and you want easy usage...
  *
  * To achieve 2) we could make it a val runtime, and do import runtime._ in the tests, and all would
  * be good!
  *
  * But then 1) is impossible...
  *
  * By doing this trick the runtime is instantiated as late as possible, and you get
  * all the necessary imports in your tests usage as well!
  *
  * @author Lorand Szakacs, https://github.com/lorandszakacs
  * @since 26 Jun 2020
  */
trait PureharmTestRuntimeLazyConversions {
  implicit def phrtToEC(implicit phtr: PureharmTestRuntime): ExecutionContext    = phtr.executionContextCT
  implicit def phrtToCS(implicit phtr: PureharmTestRuntime): ContextShift[IO]    = phtr.contextShift
  implicit def phrtToTM(implicit phtr: PureharmTestRuntime): Timer[IO]           = phtr.timer
  implicit def phrtToBS(implicit phtr: PureharmTestRuntime): BlockingShifter[IO] = phtr.blockingShifter
  implicit def phrtToBL(implicit phtr: PureharmTestRuntime): Blocker             = phtr.blocker
}