66、saleforce 的 approval process

public class TestApproval {
    public void submitAndProcessApprovalRequest() {
        // Insert an account
        Line_Item__c a = new Line_Item__c();
        a.Name = 'Test_Line_Item_code_approval';
        a.Quantity__c =2;
        a.Unit_Price2__c =1200;
        Merchandise__c merchan = new Merchandise__c();
        merchan.Name ='Test_merchandise_code_approval';
        merchan.Quantity__c = 100;
        merchan.Price__c = 20000;
        insert merchan;
        a.Merchandise__c = merchan.Id;
        Invoice__c invo = new Invoice__c();
        invo.Status__c ='Open';
        insert invo;
        a.Invoice__c = invo.Id;
        insert a;
        User user1 = [SELECT Id FROM User WHERE Alias='weizh'];
        // Create an approval request for the account
        Approval.ProcessSubmitRequest req1 = new Approval.ProcessSubmitRequest();
        req1.setComments('Submitting request for approval.');
        req1.setObjectId(a.id);
        // Submit on behalf of a specific submitter
        req1.setSubmitterId(user1.Id);
        ID[] ids = new ID[]{user1.Id};
        req1.setNextApproverIds(ids);
        // Submit the record to specific process and skip the criteria evaluation
        //req1.setProcessDefinitionNameOrId('PTO_Request_Process');
        req1.setSkipEntryCriteria(true); // Submit the approval request for the account
        Approval.ProcessResult result = Approval.process(req1); // Verify the result
        System.assert(result.isSuccess());
        System.assertEquals( 'Pending', result.getInstanceStatus(), 'Instance Status'+result.getInstanceStatus());
        // Approve the submitted request
        // First, get the ID of the newly created item
        List<Id> newWorkItemIds = result.getNewWorkitemIds();
        // Instantiate the new ProcessWorkitemRequest object and populate it
        Approval.ProcessWorkitemRequest req2 = new Approval.ProcessWorkitemRequest();
        req2.setComments('Approving request.');
        req2.setAction('Approve');
        req2.setNextApproverIds(new Id[] {UserInfo.getUserId()});
        // Use the ID from the newly created item to specify the item to be worked
        req2.setWorkitemId(newWorkItemIds.get(0));
        // Submit the request for approval
        Approval.ProcessResult result2 = Approval.process(req2);
        // Verify the results
        System.assert(result2.isSuccess(), 'Result Status:'+result2.isSuccess());
        System.assertEquals( 'Approved', result2.getInstanceStatus(), 'Instance Status'+result2.getInstanceStatus());
    }
}