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我是一名 scala 菜鸟，正在为 scala Spark 程序编写单元测试用例。当我尝试使用命令运行我的 scala 单元测试用例时sbt test，出现以下错误

BasicACRStatsTest.scala:8: not found: type BasicACRStats

[error]   var basicStats: BasicACRStats = _
[error]                   ^
BasicACRStatsTest.scala:14: not found: type BasicACRStats
[error]     basicStats = new BasicACRStats
[error]                      ^
[error] two errors found
[error] (test:compile) Compilation failed

我正在使用 intellij，当我尝试引用BasicACRStats它显示的类时Cannot resolve symbol BasicACRStats，即使我已经在正确的包中声明了它。

BasicACRStat.scala

 package com.company.analytics
 import org.apache.hadoop.conf.Configuration
 import org.apache.hadoop.fs.{FileSystem, Path}
 import org.apache.hadoop.fs.FileSystem.Statistics
 import org.apache.spark.SparkConf
 import org.apache.spark.SparkContext
 import org.apache.spark.sql.hive.HiveContext
 import scala.collection.mutable.ArrayBuffer
 import collection.mutable


 object BasicACRStats {


   def main(args: Array[String]) { …

我正在尝试在本地 cassandra 数据库上运行一个简单的测试，以检查 select 语句是否从表中返回正确的记录数。但是，放置在 before 和 after 块之间的代码不会被调用。结果我的测试就失败了。

var assert = require('assert');
var cassandra = require('cassandra-driver');
var async = require('async');

//Connect to the cassandra cluster, assuming that the keyspace & columnspace already exists
var client = new cassandra.Client({contactPoints: ['127.0.0.1'], keyspace: 'demo'}); 
describe('Cassandra is up and running', function() {
    before(function() {
        //Check if the connection got established successfuly 
        client.connect(function(err) {
            if(err){
                console.log("Oops, something went wrong : " + err);
            }
            console.log('I al here 1');
        });

        //Insert a few data to …