Salesforce 一个testmethod内最多只能调用一个executeBatch

Salesforce 一个testmethod内最多只能调用一个executeBatch,salesforce,apex,salesforce-lightning,Salesforce,Apex,Salesforce Lightning,如何修复测试类中的以下错误消息 System.UnexpectedException: No more than one executeBatch can be called from within a test method. Please make sure the iterable returned from your start method matches the batch size, resulting in one executeBatch invoca

如何修复测试类中的以下错误消息

            System.UnexpectedException: No more than one executeBatch can be called from within a test method.  Please make sure the iterable returned from your start method matches the batch size, resulting in one executeBatch invocation.
请注意,已尝试按此处建议添加限制200,但未成功

我的课程是

            global class ERTExtract255BatchClass implements Database.Batchable<sObject> {
                global Database.QueryLocator start(Database.BatchableContext bc) {
                    return Database.getQueryLocator(
                'SELECT ID,Description,Case_Desc_255__c FROM Case' 
                    );
                }
                global void execute(Database.BatchableContext bc, List<Case> scope){
                // process each batch of record
                List<Case> lstCase = new List<Case>();       
                for (Case cas : scope) {
                string Strdesc = cas.Description ; 
            if(Strdesc.length()>255){
                cas.Case_Desc_255__c = cas.Description.Left(255);
                lstCase.add(cas);  
            }
                }   
            update lstCase;
            }   
            global void finish(Database.BatchableContext bc){

            }   
 
            }
全局类ERTExtract255BatchClass实现数据库。可批处理{
global Database.QueryLocator启动(Database.BatchableContext bc){
return Database.getQueryLocator(
'从案例中选择ID、描述、案例描述\u 255\u c'
);
}
全局void execute(Database.BatchableContext bc,列表范围){
//处理每批记录
List lstCase=新列表();
对于(案例cas:范围){
字符串Strdesc=cas.Description;
如果(Strdesc.length()>255){
cas.Case_Desc_255__c=cas.Description.Left(255);
添加(cas);
}
}   
更新案例;
}   
全局void完成(Database.BatchableContext bc){
}   
}
我的测试班是

            @isTest(SeeAllData=false)
            public class testERTExtract255BatchClass {

            @IsTest
            static void testBatchJob(){
              
               List<Case> cases = new List<Case>();
               for (integer i =0;i<300;i++)
               {
                    Case c = new Case();
                    c.Description = 'aaaaaa'.rightPad(255,'b');
                    c.status = 'new';
                    c.Subject = 'test';
                    //add other mandatory fields 
                    cases.add(c);
                }

                insert cases;

                Test.startTest();
                Database.executeBatch(new ERTExtract255BatchClass());
                Test.stopTest();


                Case Strcase = [Select id,Case_Desc_255__c from Case];
                System.assertEquals(Strcase.Case_Desc_255__c.length(),255);

                    }
            }
@isTest(参见AllData=false)
公共类测试员Extract255BatchClass{
@伊斯特
静态void testBatchJob(){
列表案例=新列表();

对于(整数i=0;i您需要
for(整数i=0;i您需要
for(整数i=0;i)的任何特殊原因