specs2 ExceptionMatchers#throwAが予期せぬ挙動をしたのでメモ

なかみ

  /**
   * @return a matcher checking the type of an Exception and its message (as a regexp)
   */
  def throwA[E <: Throwable](message: String = ".*")(implicit m: ClassTag[E]): Matcher[Any] = {
    throwA(m).like { case e: Throwable => createExpectable(e.getMessage.notNull).applyMatcher(BeMatching.withPart(message)) }
  }

def suro(): Unit = throw new Exception(")")
suro must throwA[Exception](")")

こーしたら

[error]    ')' doesn't match '(?s).*).*'

ためしに

"あああああああ" matches ".*あああああああ.*" must beTrue
"あああああああ)" matches ".*あああああああ).*" must beTrue

だと

[error]    java.util.regex.PatternSyntaxException: Unmatched closing ')' near index 8
[error]    .*あああああああ).*

エスケープ必要なだけだったね・・・ とりあえずは、

suro must throwA[Exception](new Exception(")"))