hi every one.

I need 100% code coverage for the class ,i tried to make a test class but it not covered 100%  just 70%

Below is my class as well as test class as under:

My Class

public class WebServiceSalesforceFeed{
@future (callout =true)
public static void HttpResult(String oppID) {
SalesForceUrl__c sf = SalesForceUrl__c.getValues('AMUrl'); // custom setting objects.
SalesForceUrl__c sf2 = SalesForceUrl__c.getValues('IsSandBox');
HttpRequest req = new HttpRequest();
HttpResponse res = new HttpResponse();
Http http = new Http();
if(sf !=null && sf2!=null)

{
req.setEndpoint(sf.SettingValue__c+'/salesforce/SalesForceFeed?oppid='+oppID+'&IsSanbox='+sf2.SettingValue__c);
}

req.setMethod('GET');

try
{
res = http.send(req);
string result = res.getBody();
System.debug('STATUS:'+res.getStatus());
System.debug('STATUS_CODE:'+res.getStatusCode());

}
catch(System.CalloutException e)
{
System.debug('Callout error: '+ e);
System.debug(res.toString());
}

}

// run WebServiceCallout.testMe(); from Execute Anonymous to test
public static testMethod void testMe() {
WebServiceSalesforceFeed.HttpResult('006d0000006enVK');
}

}

The Test class

@isTest
private class WebServiceSalesFeedTest {

static testMethod void myUnitTest() {

Opportunity opp = new Opportunity();
opp.Name = 'Test Opp';
opp.StageName = 'To Be Searched';
opp.p1_First_Name__c ='A';
opp.p1_Last_Name__c ='D';
opp.p1_Gender__c = 'S';
opp.p1_First_Name__c ='S';
opp.p1_Last_Name__c ='A';
opp.p1_Gender__c = 'D';
opp.DOB_Main_Passenger__c = System.now().date();
opp.Number_of_Passengers__c = 4;
opp.CloseDate = System.now().date();
opp.Departure_Date__c = System.now().date();
opp.Origin_City__c = 'DEL';
opp.Destination_City__c= 'MUI';
opp.Return_Date__c = System.now().date();
opp.AmMessage__c ='testttt';

insert opp;

SalesForceUrl__c sf = new SalesForceUrl__c();
sf.Name ='AMUrl';
sf.SettingValue__c ='test';
insert sf;
SalesForceUrl__c sf2 = new SalesForceUrl__c();
sf2.Name ='IsSandBox';
sf2.SettingValue__c ='test';
insert sf2;

WebServiceSalesforceFeed obj = new WebServiceSalesforceFeed();
WebServiceSalesforceFeed.HttpResult(opp.Id);
WebServiceSalesforceFeed.testMe();
}
}

As this is custom setting object

 SalesForceUrl__c sf = new SalesForceUrl__c(); 

having SettingValue__c is custom fieild.

and two values Name = "amurl" and "SettingValue" having some value

 two values Name = "amurl" and "IsSandBox" having some value

,As i used this  in above code as shown in green line above.

Please guide me how can i achieve 100% for this class as it was about 80 % covered before i added green lines but i need this.

Thanks