Mock/Stub 切り替え

0_index.md

実装

class HogeService {
  val mailer: MailSender = new MailSender()
  
  def foo(): Bar = {
    ...
    mailer.send(mail)
    ...
  }
}

テスト

class HogeServiceSpec {

  val target: HogeService = new HogeService {
    override val mailer = mock[MailSender]
  }
  
  it("なんかのテストするぜ") {
    ...
    assert(target.foo() === expected)
  }

}