ScalaTest sampless

00_README.md

ScalaTest の素振り

org.scalatest.WordSpec

ScalaTest http://www.scalatest.org/at_a_glance/FlatSpec

build.sbt

name := "SampleTest"

version := "0.1"

scalaVersion := "2.13.1"

libraryDependencies ++= Seq(
  "org.scalatest" %% "scalatest" % "3.1.1" % "test"
)

SampleTrait.scala

package SampleCase

trait SampleTrait {
  def calc(price: Double): Double = {
    price * 1.08
  }

  private[SampleTrait] def calcWithStandardPlan(price: Double): Double = {
    (price * 2) * 1.08
  }
}

SampleTraitTest.scala

package SampleCase

import org.scalatest.wordspec.AnyWordSpec
import org.scalatest.matchers.should.Matchers
import org.scalatest.PrivateMethodTester._

class SampleTraitTest extends AnyWordSpec with Matchers {

  object SampleTrait extends SampleTrait

  "SampleTrait" when {
    "calc" must {
      "OK" in {
        val expected = 108.0
        val result = SampleTrait.calc(100)

        result shouldEqual expected
      }
    }

    "calcWithStandardPlan" must {
      "OK" in {
        val expected = 432.0

        val calcWithStandardPlan = PrivateMethod[Double](Symbol("calcWithStandardPlan"))
        val result = SampleTrait invokePrivate calcWithStandardPlan(200.0)

        result shouldEqual expected
      }
    }
  }
}