我一直在看：
http://scalamock.org/user-guide/advanced_topics/
https://scalamock.org/user-guide/matching/
https://scalamock.org/quick-start/
但是还没有得到我想要的结果，基本上我做了这个测试

scenario("myFunction reads parquet and writes to db") {
          var mockUtil: UtilitiesService = stub[UtilitiesService]
          val service = new myService(mockUtil)
          val expectedParquetDf = Seq(
              (999, "testData")
          ).toDF("number", "word")
          (mockUtil.getDataFrameFromParquet _).when("myParquetPath") returns Right(expectedParquetDf)
          service.publishToDatabase()
          (mockUtil.insertDataFrameIntoDb_).verify(expectedParquetDf,"myTable").once()        
      }

但是如果测试失败（由于Dataframe不匹配），那么输出就不理想了，简单地说就是这样

[info]   Expected:
[info]   inAnyOrder {
[info]     <stub-4> UtilitiesService.getDataFrameFromParquet(path) any number of times (called once)
[info]     <stub-4> UtilitiesService.insertDataFrameIntoPostgres[number: int, word: string] once (never called - UNSATISFIED)
[info]   }
[info]   
[info]   Actual:
[info]     <stub-4> UtilitiesService.getDataFrameFromParquet(oath)
[info]     <stub-4> UtilitiesService.insertDataFrameIntoPostgres([number: int, word: string], "myTable" (myFile.scala:28)

字符串部分是现场，但Dataframe部分；只有在列被删除的情况下才有用，如果有坏的行等情况下就不那么有用了。有什么好的方法来改进这个吗？
目前我的兔子洞已经引导我到下面，它仍然不工作和“Assert”函数返回真，使“&&”部分的工作都觉得必须有一个更好的方法。是否有一些比较器功能，我可以覆盖在标准验证？？：

def assertStringsAreEqual(expectedPath:String, actualPath:String) : Boolean = {
          assert(actualPath == expectedPath)
          true
      }
      def assertDataFramesAreEqual(expected: DataFrame, actual: DataFrame) : Boolean = {
          AssertHelpers.assertDataEqual(expected, actual) //verbos info, asserts on each row etc
          true
      }
      scenario("myFunction reads parquet and writes to db") {
          var mockUtil: UtilitiesService = stub[UtilitiesService]
          val service = new myService(mockUtil)
          val expectedParquetDf = Seq(
              (999, "testData"),
              (898, "wrongData"),
              (999, "extraRow")
          ).toDF("number", "word")
          val incorrectExample = Seq(
              (999, "testData"),
              (999, "testData")
          ).toDF("number", "word")
          (mockUtil.getDataFrameFromParquet _).when("myParquetPath") returns Right(incorrectExample) //forced to incorrect for now
          (_mockUtilService.insertDataFrameIntoPostgres _).
              expects(where { {
                      (actualDf, path) => assertDataFramesAreEqual(expectedParquetDf, actualDf) && assertStringsAreEqual(path, "ExpectedTable")
              }  })
              .once()
          service.publishToDb()
      }

作为参考，我的目标是在某个地方出现这样的东西：

Expected:
Dataframe:
[number, word]
[999, "testData"]
[898, "wrongData"]
[999, "extraRow"]
Actual:
Dataframe
[number, word]
[999, "testData"]
[999, "testData"]