Salesforce writing Test class of Future Method - Coverage 28% - salesforce

Question

I have a class where in I am trying to call a HTTP request. I have created a Mock Test and a Test class.
My Test class is successful with 28% code coverage but it fails in recognizing the call out methods I have used in my class Below is code
My Class -
public class PD_WelcomeMaroPost {
#future(callout=true)
public static void sendEmailThroughMaro(string myInpEmail) {
string successContacts = '';
string failureContacts = '';
List<Stripe_Subscripton__c> subsToUpdate = new List<Stripe_Subscripton__c>();
//List<Case> newCase = new List<Case>();
// SQL to fetch FBO who Joined Today
list<Account> conts = new list<Account> ([SELECT Id, name, Email_FLP_com__c,
(SELECT Id FROM Stripe_Subscriptons__r WHERE Start_Date__c= TODAY
AND Status__c='active'
AND Welcome_Email__C = false LIMIT 1)from account
where ID IN (select Distributor__c from Stripe_Subscripton__c
where Start_Date__c= TODAY AND Status__c='active'
AND Welcome_Email__C = false)
AND Email_FLP_com__c != NULL LIMIT 100]);
system.debug('>>>>>>>>>>' + conts);
overallEmail myEmail = new overallEmail();
for(Account c : conts){
string resultBodyGet = '';
myEmail.email.campaign_id = 172;
myEmail.email.contact.Email = c.Email_FLP_com__c;
myEmail.email.contact.first_name = c.name;
/**MAp<String, String> tags = new Map<String, String>();
tags.put('firstName', c.name);
myEmail.email.tags = tags;**/
system.debug('#### Input JSON: ' + JSON.serialize(myEmail));
try{
String endpoint = 'http://api.maropost.com/accounts/1173/emails/deliver.json?auth_token=j-V4sx8ueUT7eKM8us_Cz5JqXBzoRrNS3p1lEZyPUPGcwWNoVNZpKQ';
HttpRequest req = new HttpRequest();
req.setEndpoint(endpoint);
req.setMethod('POST');
req.setHeader('Content-type', 'application/json');
req.setbody(JSON.serialize(myEmail));
Http http = new Http();
system.debug('Sending email');
HTTPResponse response = http.send(req);
system.debug('sent email');
resultBodyGet = response.getBody();
system.debug('Output response:' + resultBodyGet);
maroResponse myMaroResponse = new maroResponse();
myMaroResponse = (maroResponse) JSON.deserialize(resultBodyGet, maroResponse.class);
system.debug('#### myMaroResponse: ' + myMaroResponse);
if(myMaroResponse.message == 'Email was sent successfully')
successContacts = successContacts + ';' + c.Email_FLP_com__c;
else
failureContacts = failureContacts + ';' + c.Email_FLP_com__c;
}
catch (exception e) {
failureContacts = failureContacts + ';' + c.Email_FLP_com__c;
system.debug('#### Exception caught: ' + e.getMessage());
}
c.Stripe_Subscriptons__r[0].Welcome_Email__c = true;
c.Stripe_Subscriptons__r[0].Welcome_Email_Sent_Date__c = system.today();
subsToUpdate.add(c.Stripe_Subscriptons__r[0]);
}
Update subsToUpdate;
}
public class maroResponse {
public string message {get;set;}
}
public class overallEmail {
public emailJson email = new emailJson();
}
public class emailJson {
public Integer campaign_id;
public contactJson contact = new contactJson();
//Public Map<String, String> tags;
}
public class contactJson {
public string email;
public string first_name;
}
}
My MockTest Class- I have used this Mockclass to generate Mock response. The documentation does not have a test method thus used the same format
#isTest
Global class PD_WelcomeMaroPostMock implements HttpCalloutMock {
Global HttpResponse respond(HttpRequest req) {
// Create a fake response
//
//System.assertEquals(JSON.serialize(myEmail),req.getbody());
HttpResponse res = new HttpResponse();
res.setHeader('Content-Type', 'application/json');
res.setBody('{"status":"success"}');
res.setStatusCode(200);
return res;
}
}
This is my Test class - This is the class I have used for the response. I have a successful insert job but my HTTP responses are failing.
#IsTest
private class PD_WelcomeMaroPost_test {
public class overallEmail {
public emailJson email = new emailJson();
}
public class emailJson {
public Integer campaign_id;
public contactJson contact = new contactJson();
}
public class contactJson {
public string email;
public string first_name;
}
#IsTest
private static void testemail() {
overallEmail myEmail = new overallEmail();
Account a = new Account();
a.Name ='Test' ;
a.Email_FLP_com__c = 'test#nextsphere.com';
insert a ;
Stripe_Subscripton__c s = new Stripe_Subscripton__c();
// insert subscription --
s.Distributor__c = a.Id;
S.Welcome_Email__c = TRUE;
S.Welcome_Email_Sent_Date__c = system.today();
s.Subscription_Id__c = 'sub_9H0LLYFZkekdMA' ;
INSERT S;
Test.setMock(HttpCalloutMock.class, new PD_WelcomeMaroPostMock());
String endpoint = 'http://api.maropost.com/accounts/1173/emails/deliver.json?auth_token=j-V4sx8ueUT7eKM8us_Cz5JqXBzoRrNS3p1lEZyPUPGcwWNoVNZpKQ';
HttpRequest req = new HttpRequest();
req.setEndpoint(endpoint);
req.setMethod('POST');
req.setHeader('Content-type', 'application/json');
req.setbody(JSON.serialize(myEmail));
Test.startTest();
PD_WelcomeMaroPost.sendEmailThroughMaro('test#nextsphere.com');
Test.stopTest();
}
}

Answer 1

When declaring a Mock myself, I declare it inside the test start transaction:
Test.startTest();
Test.setMock(WebServiceMock.class, new WebServiceMockImpl());
// Rest of test code here
Test.stopTest();
Also inside your test class you seem to only build the HTTP request and not send it try adding the below:
HttpResponse res = http.send(req);
if (res.getStatusCode() == 200) { } else { }