Hi, i want to cover my class but i don't know what i do that.

public with sharing class LCCTRL_GenBop {

    @AuraEnabled
    public static void insertFile(Id oppId, String base64FileData, Opportunity recordData) {

        try {
            Id[] contentDocIdLs = new Id[]{};
    
            ContentDocumentLink[] ctLinkLs = [SELECT ContentDocumentId FROM ContentDocumentLink WHERE LinkedEntityId = :oppId];
            
            for(ContentDocumentLink ctLink : ctLinkLs) {
                contentDocIdLs.add(ctLink.ContentDocumentId);
            }
    
            ContentVersion[] cvLs = [SELECT Id FROM ContentVersion WHERE ContentDocumentId  IN :contentDocIdLs AND IsLatest = true AND Type_fileupload__c = 'BOP'];
    
            String fileTitle = 'BOP--'+ (recordData.Name!=null ? recordData.Name : '') + '_V'+(cvLs.size()+1);
            ContentVersion cv = new ContentVersion(Type_fileupload__c = 'BOP',  VersionData = EncodingUtil.base64Decode(base64FileData), Title = fileTitle, PathOnClient = fileTitle + '.' + 'pdf');
            insert cv;

            cv = [SELECT ContentDocumentId FROM ContentVersion WHERE Id = : cv.Id];
    
            insert new ContentDocumentLink(LinkedEntityId = oppId, ContentDocumentId = cv.ContentDocumentId);

        } catch (AuraHandledException e) {
            throw new AuraHandledException(e.getMessage());
        }
    }

    @AuraEnabled
    public static Map<String,Object> getData(Id oppId) {
        Map<String,Object> dataMap = new Map<String,Object>();

        Opportunity opp = [SELECT Id, Name, Customer_Selection_Criteria_Price__c, Customer_Selection_Criteria_Time__c, Customer_Selection_Criteria_Quality__c, Customer_Selection_Criteria_Location__c, Customer_Selection_Criteria_Reputation__c, Customer_Selection_Criteria_Relationship__c,
            Account.Name, TOLABEL(Account.Country__c), TOLABEL(Account.Type), Account.Market_cap_Investors__c, Account.Dedicated_to_therapeutic_fields__c, Account.Clinical_or_marketed_product_pipeline__c, Account.Linked_to_other_CDMO__c, Account.Cultural_fit__c, Account.Expertise__c, Account.Capacity__c, Account.Strategic__c, Account.Relationship__c, 
            Nature_of_the_molecule__c, Z_Indication__c, TOLABEL(Stage_of_Development__c), Sales_expected_at_Peak_Sale__c, Estimated_probability_of_Success__c, When__c, Which_technology__c, First_source__c, Dead_line_to_deliver_the_offer__c, Dead_line_to_select_the_CDMO__c
                FROM Opportunity WHERE Id = :oppId LIMIT 1];

        dataMap.put('record', opp);

        return dataMap;
    }
}

I have try this to make test for enter in the method testInsertFile but he doesn't work.

In the test class is my data used in the org for test.

@isTest
public with sharing class TEST_LCCTRL_GenBop {

    @TestSetup
    static void setup(){

        Map<String,Schema.RecordTypeInfo> rtMapByName = Schema.SObjectType.Account.getRecordTypeInfosByName();

        Schema.RecordTypeInfo recordtype = rtMapByName.get('Commercial');

        Account account4Test = new Account(name = 'TEST ACCOUNT'
                , Country__c = 'US'
                , CurrencyIsoCode = 'EUR'
                , Type = 'Commercial'
                , RecordTypeId = recordtype.RecordTypeId);

        insert account4Test;
        
        Product2 product = TestCreate_Product2.Create_Product2();

        GMID_Product__c gmid = new GMID_Product__c();

        gmid.Z_Commercial_Product__c = product.Id;
        gmid.Z_GMID_ext_key__c = 'GMID_EXT_001';
        gmid.Z_GMID_GUOM_to_KGM__c = '0';
        gmid.Z_GMID_Status__c = true;
        gmid.Z_CRI__c = 100;
        insert gmid;

        Term_of_payment__c temOfPayment = new Term_of_payment__c();
        temOfPayment.Z_EN_Description__c = 'TEST';
        temOfPayment.Z_Source_date__c = Date.today();
        insert temOfPayment;


        Opportunity opportunity = new Opportunity();
        opportunity.AccountId = account4Test.Id;
        opportunity.Z_Product__c = product.Id;
        opportunity.Z_GMID_Product__c = gmid.Id;
        opportunity.StageName= TRGHDL_Opportunity.QUALIFICATION;
        opportunity.Name = 'TEST1';
        opportunity.Z_Service_comments__c = 'TEST1';
        opportunity.CloseDate = Date.today().addDays(30);

        opportunity.Z_Incoterms__c = 'CIP';
        opportunity.Z_Incoterms_2__c = 'TEST';
        opportunity.Z_Terms_of_Payment__c = temOfPayment.Id;
        
        insert opportunity;
    }
    
    @IsTest
    private static void testInsertFile(){

        
        String fileData = 'Title';
        String fileDateBase64 = EncodingUtil.base64Encode(Blob.valueOf(FileData));

        Opportunity opportunity = [SELECT AccountId, StageName FROM Opportunity WHERE Z_Service_comments__c ='TEST1' LIMIT 1];

        ContentVersion[] cvLs = [SELECT Id, ContentDocumentId FROM ContentVersion];
        Test.startTest();
        insert opportunity;

    }
        
    @IsTest
    private static void getData(){


    }
}