Scala學習筆記——斷言和單元測試

1.斷言

assert(conditon)將在條件不成立的時候，拋出assertionError

assert(conditon,explanation)講在條件不成立的時候，拋出explanation作為說明

package com.scala.first

/**
  * Created by common on 17-4-19.
  */
object Assert {

  def main(args: Array[String]): Unit = {
    val a = new Assert()
    a.above1(0)

  }

}

class Assert {
  val value = 1

  def above(that: Int): Unit = {
    val thatVal = that
    val thisVal = this.value
    //如果條件不滿足，Exception in thread "main" java.lang.AssertionError: assertion failed
    assert(thatVal == thisVal)
  }

  //另一種斷言
  //如果條件不滿足，Exception in thread "main" java.lang.AssertionError: assertion failed
  def above1(that: Int): Unit = {
    {
      val thatVal = that
      val thisVal = this.value
    } ensuring(that == this.value)

  }
}

 

2.單元測試

Scala中提供了多種單元測試的方法，比如ScalaTest

ScalaTest提供了多種單元測試的方法，最簡單的就是創建org.scalatest.suite類，並在這些類中定義測試方法

如果cmd+shift+T的快捷鍵無效的話，在需要測試的類上右鍵，Go to Test，創建一個測試類