I've created a VF page that works great.  However, I cannot get the test class to pass for the life of me.  Below is an exceprt from my VF extension:

public class OpportunityWonExt{
    
    ApexPages.StandardController controller;
    public Opportunity theOpp {get;set;}
    public Account act {get; set;}
    public Contract ct {get; set;}
    
    public OpportunityWonExt(ApexPages.standardController controller){
        theOpp = (Opportunity)controller.getRecord();
        theOpp.CloseDate = Date.today();
        theOpp.StageName = 'Closed Won';
        String actid = theOpp.AccountID;
        OpportunityWonProcess__c settings = OpportunityWonProcess__c.getInstance('Standard Settings');
        String ctOwner = settings.Contract_Owner__c;
        act = [SELECT Id, Name, Company_Size_Type__c FROM Account WHERE ID =:actid ];
        system.debug('LOOK HERE act' + act);
        ct = new Contract();
        ct.AccountID = theOpp.AccountID;
        ct.Status = 'Draft';
        ct.ContractTerm = 12;
        ct.OwnerID = ctOwner;

Below is an excerpt from my test class
 

@isTest(SeeAllData=true) 
private Class OpportunityWonTest{
    
    static testMethod void theTests(){
        // setup some variables 
        String standardPriceBookId = '';
        String UID = '';
        String opportunityName = 'This Is My Favorite Opportunity1234';
        User u = [SELECT ID FROM User WHERE IsActive = TRUE LIMIT 1];
        UID = u.ID;
        
        // Select pricebook
        PriceBook2 pb2Standard = [SELECT ID FROM Pricebook2 WHERE IsStandard = TRUE];
        standardPriceBookId = pb2Standard.Id;
        
        // Setup Account
        Account a = new Account(Name = 'Test Account',Website = 'www.test.com',Company_Size_Type__c = 'Enterprise',OwnerID=UID);
        insert a;
        
        // Setup Opportunity
        Date closedate =  Date.today();
        Opportunity o = new Opportunity(Account = a, Name=opportunityName, StageName='Prospecting', CloseDate=Date.today(),Logo_Use__c = 'Yes', OwnerID=UID);
        insert o;
        Opportunity opp = [Select ID from Opportunity WHERE Name = 'This Is My Favorite Opportunity1234'];
        
        // set up product2
        Product2 p2 = new Product2(Name='Test Product',isActive=true);
        insert p2;
        
        // set up PricebookEntry
        PricebookEntry pbe = new PricebookEntry(Pricebook2Id=standardPriceBookId, Product2Id=p2.Id, UnitPrice=99, isActive=true);
        insert pbe;
        
        // set up OpportunityLineItem
        OpportunityLineItem oli = new OpportunityLineItem(PriceBookEntryId=pbe.Id, OpportunityId=o.Id, Quantity=1, TotalPrice=99, Discount__c=0, Contract_Length__c = 12);
        insert oli;

        // load the page       
        PageReference pageRef = Page.OpportunityWon;
        pageRef.getParameters().put('Id',opp.id);
        Test.setCurrentPageReference(pageRef);
        
        // load the extension
        ApexPages.StandardController newcontroller = new ApexPages.StandardController(opp);
       OpportunityWonExt OppWonExt = new OpportunityWonExt(newcontroller);

When I run the test I get the error "System.QueryException: List has no rows for assignment to SObject" pointing to line 15 for the extension class and line 45 for the test class.

The confusing part is the Account is defined, as it saves the Account fields when I save the page.  Additionally, when I debug there is an Account being selected, so no idea how the list is ending up empty...