Hello, everyone!

I am trying to implement a test class for a trigger, that calls a http method (which comes from this tutorial: https://cloud.google.com/architecture/calling-protected-cloud-functions) .

In my case, everytime when the custom object 'Proposta__c' is updated, the GCPManageCustomersService method is called. Basically, this class implements the calling of a cloud functions that was set up by following the aforementioned tutorial.

When implementing the ' GCPMockHTTPResponseGenerator' class on my test class 'GCPManageCustomersServiceTest', I always get assertion errors on the following lines:
 

System.assertEquals(1, asyncJobList.size());
        
System.assertEquals(true, mock.methodCalled);

Below, I show you the complete test class:
 

@isTest
public class GCPManageCustomersServiceTest {

    static testmethod void testQueueable() {

        GCPMockHttpResponseGenerator mock = new GCPMockHttpResponseGenerator(); 
        

        Test.setMock(HttpCalloutMock.class, mock);
        
        Test.startTest();
        
        PriceBook2 pb_se_conv = new PriceBook2();
		pb_se_conv.Name = 'SE/CO - CONV';
        pb_se_conv.Pre_o_2023_R_MWh__c = 123.45;
        insert pb_se_conv;
        
        PriceBook2 pb_se_I0 = new PriceBook2();
		pb_se_I0.Name = 'SE/CO - I0';
        insert pb_se_I0;
        
        PriceBook2 pb_se_I100 = new PriceBook2();
		pb_se_I100.Name = 'SE/CO - I100';
        insert pb_se_I100;
        
        PriceBook2 pb_se_I5 = new PriceBook2();
		pb_se_I5.Name = 'SE/CO - I5';
        insert pb_se_I5;
        
        PriceBook2 pb_se_INE = new PriceBook2();
		pb_se_INE.Name = 'SE/CO - INE';
        insert pb_se_INE;
        
        
        PriceBook2 pb_NE_conv = new PriceBook2();
        pb_NE_conv.Name = 'NE/CO - CONV';
        insert pb_NE_conv;
                
        PriceBook2 pb_NE_I0 = new PriceBook2();
        pb_NE_I0.Name = 'NE/CO - I0';
        insert pb_NE_I0;
                
        PriceBook2 pb_NE_I100 = new PriceBook2();
        pb_NE_I100.Name = 'NE/CO - I100';
        insert pb_NE_I100;
                
        PriceBook2 pb_NE_I5 = new PriceBook2();
        pb_NE_I5.Name = 'NE/CO - I5';
        insert pb_NE_I5;
                
        PriceBook2 pb_NE_INE = new PriceBook2();
        pb_NE_INE.Name = 'NE/CO - INE';
        insert pb_NE_INE;
        
        PriceBook2 pb_S_conv = new PriceBook2();
        pb_S_conv.Name = 'S/CO - CONV';
        insert pb_S_conv;
                
        PriceBook2 pb_S_I0 = new PriceBook2();
        pb_S_I0.Name = 'S/CO - I0';
        insert pb_S_I0;
                
        PriceBook2 pb_S_I100 = new PriceBook2();
        pb_S_I100.Name = 'S/CO - I100';
        insert pb_S_I100;
                
        PriceBook2 pb_S_I5 = new PriceBook2();
        pb_S_I5.Name = 'S/CO - I5';
        insert pb_S_I5;
                
        PriceBook2 pb_S_INE = new PriceBook2();
        pb_S_INE.Name = 'S/CO - INE';
        insert pb_S_INE;
        
        PriceBook2 pb_N_conv = new PriceBook2();
        pb_N_conv.Name = 'N/CO - CONV';
        insert pb_N_conv;
                
        PriceBook2 pb_N_I0 = new PriceBook2();
        pb_N_I0.Name = 'N/CO - I0';
        insert pb_N_I0;
                
        PriceBook2 pb_N_I100 = new PriceBook2();
        pb_N_I100.Name = 'N/CO - I100';
        insert pb_N_I100;
                
        PriceBook2 pb_N_I5 = new PriceBook2();
        pb_N_I5.Name = 'N/CO - I5';
        insert pb_N_I5;
                
        PriceBook2 pb_N_INE = new PriceBook2();
        pb_N_INE.Name = 'N/CO - INE';
        insert pb_N_INE;        
        
        
        

        
        Account acc = new Account();
        acc.Name = 'ACC2';
        acc.OwnerId = UserInfo.getUserId();
        
        insert acc;
        
        
        Opportunity opp = new Opportunity();
        opp.Name = 'TEST OPP 27_05_22';
        opp.AccountId = acc.Id;
        opp.CloseDate = date.today();
        opp.StageName = 'Proposta';
        
        insert opp;
        
        RFQ__c rfq = new RFQ__c();
        rfq.Oportunidade__c = opp.Id;
        rfq.Respons_vel__c = UserInfo.getUserId();
        date inicio = date.today();
        rfq.In_cio_Suprimento__c = date.today();
        rfq.Validade_Suprimento__c = inicio.addMonths(15);
        
        rfq.Tipo_de_Energia__c = 'Conv';
        
        rfq.Ponto_de_Entrega__c = 'SE/CO';
        
        insert rfq;
        
        
        RFQ__c rfq_inserted = [SELECT Id, Ponto_de_Entrega__c, Tipo_de_Energia__c FROM RFQ__c WHERE Id=:rfq.Id];
      
        
        Proposta__c proposta_first = [SELECT Name, Id,Pre_o_Ano1_Tabela__c, Cat_logo_de_pre_os__c FROM Proposta__c WHERE RFQ__c=:rfq_inserted.Id];
        
        proposta_first.CNPJ__c = '123456';
        
        update proposta_first;
        
        Test.stopTest();
        
        List<AsyncApexJob> asyncJobList =
            [select id, ApexClass.Name, JobType, Status from AsyncApexJob];
        
        PriceBook2 pb_correspondente = [SELECT Id, Name from PriceBook2 WHERE Id=:proposta_first.Cat_logo_de_pre_os__c];
                  
        System.assertEquals(pb_correspondente.Name, 'SE/CO - CONV' );  
        
        System.assertEquals(proposta_first.Pre_o_Ano1_Tabela__c, 123.45 ); 
        
       
        
        
        System.assertEquals(1, asyncJobList.size());
        
        System.assertEquals(true, mock.methodCalled);
        
        
            
        
    }
}

Finally, the trigger that does the http callout:
 

trigger updatePricesProposal on Proposta__c (after update){
    
    if (Trigger.isUpdate){
     
        
        for (Proposta__c prop : Trigger.new){
            
            List <Proposta__c> prop_list  =  new List <Proposta__c>();
            
            prop_list.add(prop);
           
            String serialisedProp = JSON.serialize(prop_list);
            
            try{
                
                Proposta__c old_prop = Trigger.oldMap.get(prop.Id);
                              
                if(prop.Cat_logo_de_pre_os__c != null && old_prop.Tempo_Botao_Preco__c.format('yyyy-MM-dd\'T\'HH:mm:ss\'Z\'') != prop.Tempo_Botao_Preco__c.format('yyyy-MM-dd\'T\'HH:mm:ss\'Z\'')  ){
                
                GCPManageCustomersService gcpService = new GCPManageCustomersService(serialisedProp, 'update');
                    
                ID jobID = System.enqueueJob(gcpService);               
                
                }
                
                
                
            }catch(Exception e){
                
                           
                
                
            }
                    
            
        }        
        
        
    } 
            

}

I appreciate any help you can provide.

Best regards,