如何扩展 scalatest 断言宏

Question

我要转：

eventually { assert(x == 0) }

进入：

verify { x == 0 }

并且仍然收到一条不错的控制台消息：

Caused by: org.scalatest.exceptions.TestFailedException: 1 did not equal 0

如何实现verify？

Answer 1

verify 也必须是宏:

import scala.language.experimental.macros
import scala.reflect.macros.blackbox

class VerifyMacro(val c: blackbox.Context) {
  import c.universe._

  def verifyImpl(condition: Tree): Tree =
    q"${c.prefix}.eventually(${c.prefix}.assert($condition))"
}

import org.scalatest._
import org.scalatest.concurrent._

trait Verifications extends Assertions with Eventually {
  def verify(condition: Boolean): Assertion = macro VerifyMacro.verifyImpl
}

如何扩展 scalatest 断言宏

How to extend scalatest assert macro

macros

scala

scalatest