在 Scalatest 中使用什么代替符号?

编程入门行业动态更新时间:2024-10-19 16:37:29

本文介绍了在 Scalatest 中使用什么代替符号?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！问题描述

在 scalatest 中，您应该能够使用如下符号测试布尔属性:

In scalatest, you’re supposed to be able to test boolean properties using symbols like this:

iter shouldBe 'traversableAgain

但是这种表示法在最新版本的 scala 中已被弃用，所以现在你应该这样写:

But this notation have been deprecated in the most recent versions of scala, so now you’re supposed to write:

iter shouldBe Symbol("traversableAgain")

这有点难看.有没有更好的选择?

Which is a bit ugly. Is there any better alternative?

推荐答案

考虑 BePropertyMatcher 提供类型安全的谓词匹配语法

Consider BePropertyMatcher which provides type-safe predicate matching syntax

iter should be (traversableAgain)

例如

import org.scalatest.flatspec.AnyFlatSpec import org.scalatest.matchers.{BePropertyMatchResult, BePropertyMatcher} import org.scalatest.matchers.should.Matchers trait CustomMatchers { val traversableAgain = new BePropertyMatcher[Iterator[_]] { def apply(left: Iterator[_]): BePropertyMatchResult = BePropertyMatchResult(left.isTraversableAgain, "isTraversableAgain") } } class BePropertyMatcherExampleSpec extends AnyFlatSpec with Matchers with CustomMatchers { "BePropertyMatcher" should "provide type-safe checking of predicates" in { Iterator(42, 11) should be (traversableAgain) } }