I am facing issue in code coverage of a Batchable class in apex - apex

Question

I am facing issue in code coverage of a Batchable class in apex
Below is the type of settings used
static resources are used
Custom settings are used
multiple API call outs are used IN EXECUTE method of batchable class.
Multiple calls because of API pagination like 50 records each time for a total of 3K records
The issue is related to APEX Test class.
Total test coverage getting as 63% not increasing.
Below is the test class:
#isTest
global class Core_XXXX_IntelProductDataTest {
#testsetup static void TestTestUp()
{
insertCustomSettings();
}
#isTest static void Core_XXXXXX_ProductDataTest200(){
Test.startTest();
Test.setMock(HttpCalloutMock.class, new MockHttpResponseGenerator());
HTTPResponse res1 = getInfoFromExternalService('https://XXXXXX/services/products?localeGeoId=en-US&categoryId=873&includeAttributes=true&limit=1&offset=1');
StaticResource sr = [SELECT Id, Body FROM StaticResource WHERE Name = 'Product_XXXXXX' LIMIT 1];
String body = sr.Body.toString();
System.assertEquals(body, res1.getBody());
System.assertEquals(200, res1.getStatusCode());
Database.executeBatch(new Core_XXXX_IntelProductData());
Core_XXXXXXProductDataScheduler.Core_XXXXXXProductDataScheduler();
Test.stopTest();
}
public static HttpResponse getInfoFromExternalService(String endpoint) {
HttpRequest req = new HttpRequest();
req.setEndpoint(endpoint);
req.setMethod('GET');
req.setTimeout(60000);
Http h = new Http();
HttpResponse res = h.send(req);
system.debug('httpMock:'+res);
return res;
}
public static void insertCustomSettings(){
List<Core_IQR_Endpoints__c> endPointList = new List<Core_IQR_Endpoints__c>();
Core_IQR_Endpoints__c e1 = new Core_IQR_Endpoints__c();
boolean customAPILoadFlag= true;
DateTime todaysDate = System.today()-1;
DateTime customAPILoaddate =System.today()-2;
String todaysDateStr='';
if (customAPILoadFlag)
{
todaysDateStr = customAPILoaddate.format('yyyy-MM-dd');
todaysDateStr =todaysDateStr + 'T00:00:00Z';
}
else
{
todaysDateStr = todaysDate.format('yyyy-MM-dd');
todaysDateStr =todaysDateStr + 'T00:00:00Z';
}
e1.name = 'authtoken';
e1.Endpoint__c='client_id=ec3dc7a0-5f81-4846-8b34-d288386dc520&client_secret=6Cr7Q~j1Zbsw3psK8K_xlqcSll7CZlx0n7a7l&grant_type=client_credentials';
Core_IQR_Endpoints__c e2 = new Core_IQR_Endpoints__c();
e2.name = 'authtokenURL';
e2.Endpoint__c='https://XXXX.com/v1/auth/token';
Core_IQR_Endpoints__c e3 = new Core_IQR_Endpoints__c();
e3.name = 'Product_XXX_Integration_IQR';
e3.Endpoint__c='https://XXXX.com/v1/services/products?localeGeoId=en-US&categoryId=873&includeAttributes=true&limit=1';
e3.IQR_PIM_Custom_DataLoad__c= true;
e3.IQR_PIM_Custom_DataLoad_Date__c= System.today()-2;
Core_IQR_Endpoints__c e4 = new Core_IQR_Endpoints__c();
e4.name = 'Product_PIM_Integration_IQR1';
e4.Endpoint__c='https://XXXX.com/v1/services/products?localeGeoId=en-US&categoryId=873&includeAttributes=true&limit=1&offset=2&filters=updatedDateTime gt '+ todaysDateStr;
endPointList.add(e1);
endPointList.add(e2);
endPointList.add(e3);
endPointList.add(e4);
insert endPointList;
}
public static void recordInsertSetUp(){
List<Core_IQR_Endpoints__c> endPointList = new List<Core_IQR_Endpoints__c>();
Core_IQR_Endpoints__c e11 = new Core_IQR_Endpoints__c();
e11.name = 'authtoken';
e11.Endpoint__c='client_id=ec3dc7a0-5f81-4846-8b34-d288386dc520&client_secret=6Cr7Q~j1Zbsw3psK8K_xlqcSll7CZlx0n7a7l&grant_type=client_credentials';
Core_IQR_Endpoints__c e22 = new Core_IQR_Endpoints__c();
e22.name = 'authtokenURL';
e22.Endpoint__c='https://XXXX.com/v1/auth/token';
Core_IQR_Endpoints__c e33 = new Core_IQR_Endpoints__c();
e33.name = 'Product_XXX_Integration_IQR';
e33.Endpoint__c='https://XXXX.com/pim/v1/services/products?localeGeoId=en-US&categoryId=873&includeAttributes=true&limit=1&offset=1';
endPointList.add(e11);
endPointList.add(e22);
endPointList.add(e33);
insert endPointList;
HTTPResponse res = getInfoFromExternalService('https://XXXX.com/v1/auth/token');
HTTPResponse res1 = getInfoFromExternalService('https://XXXX.com/v1/services/products?localeGeoId=en-US&categoryId=873&includeAttributes=true&limit=1&offset=1');
HTTPResponse res2 = getInfoFromExternalService('https://XXXX.com/services/products?localeGeoId=en-US&categoryId=873&includeAttributes=true&limit=1&offset=2');
HTTPResponse res3 = getInfoFromExternalService('https://XXXX.com/services/products?localeGeoId=en-US&categoryId=873&includeAttributes=true&limit=1&offset=3');
HTTPResponse res4 = getInfoFromExternalService('https://XXXX.com/services/products?localeGeoId=en-US&categoryId=873&includeAttributes=true&limit=1&offset=4');
HTTPResponse res5 = getInfoFromExternalService('https://XXXX.com/services/products?localeGeoId=en-US&categoryId=873&includeAttributes=true&limit=1&offset=5');
}
public class MockHttpResponseGenerator implements HttpCalloutMock {
public HTTPResponse respond(HTTPRequest req) {
HttpResponse res = new HttpResponse();
res.setHeader('Content-Type', 'application/json');
StaticResource sr = [SELECT Id, Body FROM StaticResource WHERE Name = 'Product_XXX_Integration_IQR' LIMIT 1];
res.setBody(sr.Body.toString());
res.setStatusCode(200);
System.assert(res != null);
return res;
}
}
}