scala – 如何使用Mockito验证Specs2中特定字符串匹配器的调用

// simplified httpClient with only one parameter
val httpClient = mock[HttpClient]
httpClient.post(anyString) returns ""

httpClient.post("s1")
httpClient.post("s2")

// forget specs2
// there was two(httpClient).post(anyString)

org.mockito.Mockito.verify(httpClient,org.mockito.Mockito.times(1)).post("s1")

// I guess that you don't want this to pass but it does
org.mockito.Mockito.verify(httpClient,org.mockito.Mockito.times(1)).post("s1")

一种可能的方法是定义一个匹配器来检查参数的连续值：

there was two(httpClient).post(consecutiveValues(===("s1"),===("s2")))

而且连续的值匹配器定义如下：

import matcher._
import MatcherImplicits._

// return a matcher that will check a value against a different
// `expected` matcher each time it is invoked
def consecutiveValues[T](expected: Matcher[T]*): Matcher[T] = {
  // count the number of tested values
  var i = -1

  // store the results
  var results: Seq[(Int,MatchResult[T])] = Seq()

  def result(t: T) = {
    i += 1
    // with Mockito values are tested twice
    // the first time we return the result (but also store it)
    // the second time we return the computed result
    if (i < expected.size) {
      val mr = expected(i).apply(Expectable(t))
      results = results :+ (i,mr)
      mr
     } else results(i - expected.size)._2
  }

  // return a function that is translated to a specs2 matcher
  // thanks to implicits
  // display the failing messages if there are any
  (t: T) => (result(t).isSuccess,results.filterNot(_._2.isSuccess).map { case (n,mr) => 
               s"value $n is incorrect: ${mr.message}" }.mkString(","))
}

您可以测试上面的代码.失败消息不是最好的,但可以解决问题.在这种情况下：

httpClient.post("s1") 
httpClient.post("s2")

there was two(httpClient).post(consecutiveValues(===("s1"),===("s3")))

你会看见：

[error] x test
[error]  The mock was not called as expected: 
[error]  httpClient.post(
[error]      value 1 is incorrect: 's2' is not equal to 's3'
[error]  );
[error]  Wanted 2 times:
[error]  -> at ... 
[error]  But was 1 time:
[error]  -> at ...