Need help with test class for @invocablemethod
Apex Class:-
public class SurveyResponseUpdate{
    
    @InvocableMethod
    public static void updateContactWithResponse(List<Id> ResId){
        set<Id> ConId = new set<Id>();
        set<Id> UserId = new set<Id>();
        map<Id, String> contactMap = new map<Id, String>();
        for(SurveyQuestionResponse surveyRes:[SELECT id, QuestionId, ResponseId, Response.SubmitterId, 
                                              QuestionChoiceId, Question.Name, QuestionChoice.Name
                                              FROM SurveyQuestionResponse
                                              WHERE Id =: ResId])
        {
            if(surveyRes.Response.SubmitterId != null 
               && string.valueOf(surveyRes.Response.SubmitterId).startswith('003')
               && surveyRes.Question.Name == 'How many employees are in your organization?')
            {
                contactMap.put(surveyRes.Response.SubmitterId, surveyRes.QuestionChoice.Name);
            }
        }
        
        List<Account> acclisttoUpdate = new List<Account>();
        
        for(Contact con:[SELECT Id, AccountId FROM Contact WHERE Id IN :contactMap.keyset() AND AccountId != NULL])
        {
            acclisttoUpdate.add(new Account(id = con.accountid, Number_of_Employees__c = contactMap.get(con.Id)));
        }
        
        if(acclisttoUpdate.size() > 0){
            update acclisttoUpdate;
        }
    }
}

Test Class:-
@isTest
private class Test_SurveyResponseUpdate {
    private static testMethod void doTest() {
        
        Account testAccount = new Account();
        testAccount.Name='Test Account' ;
        insert testAccount;
        
        List<Account> listAccount = new List<Account>();
        update listAccount;
         
        Contact cont = new Contact();
        cont.FirstName='Test';
        cont.LastName='Test';
        cont.Accountid= testAccount.id;
        insert cont;
        
        List<Contact> listCont = new List<Contact>();
        
        SurveyQuestion survQuestion = new SurveyQuestion();
        
        SurveyResponse survResponse = new SurveyResponse();
                
        SurveyQuestionChoice survQuestChoice = new SurveyQuestionChoice();
        
        Test.startTest();
            List<SurveyQuestionResponse> survQuestResponse = new List<SurveyQuestionResponse>();
            List<id> listId= new List<id>();
            SurveyResponseUpdate.updateContactWithResponse(listId);
        Test.stopTest();

        
    }
}

I am getting 52% coverage.