ScalaTest

app/conf/routes

GET  /api  controllers.ApiController.api(x: Int, y: Int ?= 10)

 

app/services/Adder.scala

package services

import javax.inject.Singleton

trait Adder {
  def add(x: Int, y: Int): Int
}

@Singleton
class ServiceAdder extends Adder {
  override def add(x: Int, y: Int): Int = x + y
}

 

app/controllers/ApiController.scala

package controllers

import play.api.mvc._
import services.Adder

import javax.inject._
import scala.concurrent.ExecutionContext

@Singleton
class ApiController @Inject() (cc: ControllerComponents, adder: Adder)(
  implicit ec: ExecutionContext
) extends AbstractController(cc) {

  def api(x: Int, y: Int): Action[AnyContent] = Action { request =>
    val r = adder.add(x, y)
    Ok(s"$r")
  }
}

 

app/Module.scala

import com.google.inject.AbstractModule
import services._


class Module extends AbstractModule {
  override def configure() = {
    bind(classOf[Adder]).to(classOf[ServiceAdder])
  }
}

 

 

test/AdderTest.scala

package services

import org.scalatestplus.play.PlaySpec
import org.scalatestplus.play.guice.GuiceOneAppPerSuite
import play.api.Application
import play.api.inject.guice.GuiceApplicationBuilder
import play.api.inject.{Binding, bind}
import play.api.mvc.Result
import play.api.test.FakeRequest
import play.api.test.Helpers._

import scala.concurrent.Future

class TestAdder extends Adder {
  override def add(x: Int, y: Int): Int = 100 + x + y
}

class AdderTest extends PlaySpec with GuiceOneAppPerSuite {
  val overrideModules: Seq[Binding[Adder]] = Seq(
    bind[Adder].to[TestAdder]
  )

  override def fakeApplication(): Application =
    new GuiceApplicationBuilder().overrides(overrideModules).build()

  // ServiceAdder 테스트
  "ServiceAdder" must {
    "should be simple add" in {
      val adder = new ServiceAdder()
      adder.add(2, 4) mustBe 6
    }
  }

  // fackApplication 에서 설정한대로 TestAdder 로 application 을 만들어
  // route 테스트를 한다.
  "ApiController" should {
    "TestAdder should plus 100" in {
      val futureRes: Future[Result] = route(app, FakeRequest(GET, "/api?x=2&y=4")).get
      contentAsString(futureRes) mustBe "106"
    }
  }
}