Salesforce- retrieve Contact.opportunites - salesforce

Question

Here is snippet I am using in my anonymous window . Purpose is to retrieve Opportunities of a contact. Even after adding opportunity contact role , contact.Opportunities.size is resulting in zero (last debug line). Am I missing something ? you may use the below code directly.
Update: able to get size now but same logic doesn't work for code coverage in test class . details listed below:
Only 'if' part of controller is covered and 'else' part is never covered even though size of contact.opportunities is more than 0.
Controller method :
public PageReference sendingEmail() {
//contact1 has query records
sizeVar = contact1.Opportunities.size();
if(contact1.npo02__OppAmountLastYear__c>0 ) {
if(sizeVar==0) {
// if size is 0 then navigate to a particular vf page
PageReference pr = Page.NoDonationOrNoEmail;
pr.getParameters().put('id',(String)contact1.id);
pr.setRedirect(true);
return pr;
}
else
{ //when contact.opportunities size is more than 0 then navigate to
other vf page.
PageReference pr1 = Page.NoPrint;
pr1.getParameters().put('id',(String)contact1.id);
pr1.setRedirect(true);
return pr1;
}
} return null;
}
Test Class:
//creating account
Account a = new Account();
a.Name = 'Test Co.';
a.BillingStreet = '298 S. Ringo Street';
a.BillingCity = 'Little Rock';
insert a;
//Creating contact
Contact contact1 = new Contact();
contact1.FirstName = 'Paul';
contact1.LastName = 'Test';
contact1.AccountId = a.id;
contact1.npo02__OppAmountLastYear__c=100;
insert contact1;
//creating opportunity
Opportunity o = new Opportunity();
o.RecordType = [SELECT Id, Name, DeveloperName FROM RecordType
WHERE Name = 'Membership' LIMIT 1];
o.Name = 'New Record';
o.StageName = 'Posted';
o.AccountId = contact1.AccountId;
o.CloseDate = Date.today();
o.Description = 'Test Record';
insert o;
//creating opportunity contact role
OpportunityContactRole ocr = new OpportunityContactRole();
ocr.ContactId = contact1.Id;
ocr.OpportunityId = o.Id;
ocr.IsPrimary = TRUE;
ocr.Role = 'Decision Maker';
insert ocr;
System.debug('created opportunity contact role for primary');
Update o;
contact1 = [SELECT Id, Name,(SELECT id FROM opportunities) FROM
Contact WHERE Id=:contact1.Id];
PageReference pr = Page.NoPrint;
pr.getParameters().put('id', String.valueOf(contact1.id));
Test.setCurrentPage(pr);
ApexPages.StandardController cont5 = new
ApexPages.StandardController(contact1);
BulkEmailController testAccPlan = new
BulkEmailController(cont5);
testAccPlan.sendingEmail();

Answer 1

When you create and insert a record, you don't get formula fields nor you can navigate lookup. The same goes with child relationship.
You have to query the fields you need.
Change Update contact1; to contact1 = [SELECT Id, (SELECT Id FROM Opportunities) FROM Contact WHERE Id = :contact1.Id]; and the last debug line will print 1.