Passing an object in from a test object to a class to get an Id

Id PlanId = ApexPages.currentPage().getParameters().get('id');
			plan = [SELECT OwnerId FROM My_Plan__c WHERE Id = :PlanId];
        	userId = plan.OwnerId;

@isTest(SeeAllData=true)
Private class PersonalDashBoardTest {
    @isTest static void TestPersonalDashBoard() {
        PersonalDashTestData.createAccountWithOpps();
        PersonalDashTestData.createGoals();
        My_Plan__c plan = new My_Plan__c();
        plan.Name = 'test 123';
        insert(plan);
		Test.startTest();
        //Use the PageReference Apex class to instantiate a page
   //    PageReference pageRef = Page.AccountDashBoardPage;  // name of the page goes here
       //In this case, the Visualforce page named 'success' is the starting point of this test method. 
   //    Test.setCurrentPage(pageRef);
       //Instantiate and construct the controller class.
       ApexPages.StandardController MyPlan = new ApexPages.StandardController(plan);   
       PersonalDashBoardClass controller = new PersonalDashBoardClass(MyPlan);
        controller.getAccountSummary60();
        controller.getAccountSummary90();
        controller.getAcct60Total();
        controller.getAcct90Total();
        controller.getOpp60Total();
        controller.getOpp90Total();
        test.stopTest();
    }
}