Not really sure how to write this class. I cannot seem to get any coverage, and I am stumped as to why.

Here is my class:

public with sharing class MyChartController {
	
	public String strCase;
	
	public MyChartController(ApexPages.StandardController stdController){
		strCase = ApexPages.currentPage().getParameters().get('Id'); 
	}
   
	public List<AggregateResult> getDatabyType(){
   		Case c = [Select id, ContactId From Case where id =: strCase LIMIT 1];
   
   		List<AggregateResult> result = [Select COUNT(Id) tskCNT, Type FROM Task WHERE WhoId =: c.ContactId GROUP BY Type];
    	return result;      
	}
}

 And here is the Test Class that has no coverage results:

@isTest
private class MyChartController_Test {

    static testMethod void MyChartController_Test() {
    	
    	PageReference pageRef1 = Page.MyChart;
    	pageRef1.getParameters().get('Id');
    	Test.setCurrentPage(pageRef1);
    	
    	Account act1 = new Account();
    	act1.LastName = 'Test';
    	act1.RecordTypeId = '012i00000006R7z';
    	
    	insert act1;
    	
    	Contact ct1 = new Contact();
    	ct1.AccountId = act1.ParentId;
    	ct1.FirstName = 'John';
    	ct1.LastName = 'Test';
    	
    	insert ct1;
    	
    	Task tsk1 = new Task();
    	tsk1.Subject = 'Other';
    	tsk1.Priority = 'High';
    	tsk1.OwnerId = '005i0000000t0F5';
    	tsk1.Type = 'Follow';
    	tsk1.Status = 'Completed';
    	tsk1.WhoId = ct1.Id;
    	
    	insert tsk1;
    	
    	Case cs1 = new Case();
    	cs1.Origin = 'Web';
    	cs1.ContactId = ct1.Id;
    	cs1.Status = 'Closed';
    	
    	insert cs1;
    	
    	ApexPages.currentPage().getParameters().put('retURL','/'+cs1.id);
    	
    	MyChartController(new ApexPages.StandardController(cs1));
    }
}

 Any assistance and guidance would be greatly appreciated.