[SalesForce] Chatter Answers Test Failures – Invalid field CommunityId for sObject Case

Your trigger is only firing after update and your test does not perform any updates, only the insert of an account and opportunity. Do you intend for Implementation records to be inserted on the insert of a new opportunity? If so, you should make your trigger after insert as well. Alternatively, you can insert the opp and then update it in your test.

The likely reason for your List has no row error is that you are trying to SOQL into a single sObject and not a list and this will throw an error when no rows are returned. In this case, no rows are returned from your Implementation query because of the issue with after update and how you've structured your test.

Instead, try querying into a list of sObject and this will prevent an exception from occurring in your test:

List<Implementation__c> impls = [SELECT...
// And assuming you arrange your test to produce 1 object...
System.assertEquals(1, impls.size());
System.assertEquals('Phase 0', impls[0].Phase__c);

Product Family field on Asset works like a formula field. Its value is populated from Parent Product's Product Family field.

If you assign any product to the asset like

Product newProduct = new Product(Name = 'newProduct', ProductFamily = 'Licence');
insert newProduct;

asset a = new Asset (
                    Name = 'Product Type C',
                    AccountId = someAccount.Id,
                    Product2Id = newProduct.Id;
                    );
insert a;

Now you can see Product family populated.