I am trying to have a site that has a visualforce page allowing someone to upload an attachment with the new record that they are creating. I have the attachment passing at 95% code coverage but it doesn't seem to actually be uploading the attachment with the new record.

VF: 

<apex:pageBlockButtons >
    <apex:commandButton action="{!save}" value="Submit"/>
       <apex:commandButton action="{!cancel}" value="Cancel"/>
    </apex:pageBlockButtons>
    <apex:pageBlockSection title="Upload the Attachment" collapsible="false" dir="LTR" columns="1">
        <div id="upload" class="upload">                                   
            <apex:inputFile id="fileToUpload" value="{!fileBody}" filename="{!fileName}" styleClass="input-file"/>                            
        </div>
</apex:pageBlockSection>

Apex Class: 

public class dataSheetAttachment
{
    public Data_Feasibility_Request__c objdfr{get;set;}
    public Attachment myAttachment{get;set;}
    public string fileName{get;set;}
    public Blob fileBody{get;set;}

    public dataSheetAttachment(Apexpages.standardcontroller controller)
    {
        objdfr = (Data_Feasibility_Request__c)controller.getRecord();
        myAttachment = new Attachment();
    }
    public pagereference save()
    {
        if(myAttachment.Name == null)
        {
            insert objdfr;
        }
        if(myAttachment.Name != null)
        {
            insert objdfr;
            System.debug('@@@@@fileBody'+fileBody);    
            myAttachment = new Attachment();
            Integer i=0;
            myAttachment .clear();
            myAttachment.Body = fileBody;
            myAttachment.Name = fileName ;
            myAttachment.ParentId = objdfr.id;            
            insert myAttachment;   
        }             
       pagereference pr = Page.Thank_You;                          
       pr.setRedirect(true);
       return pr;
    }
}

Test Class: 
 

@isTest
private class Test_dataSheetAttachment {

public static testMethod void validatedataSheetAttachment() {        
    Data_Feasibility_Request__c myDFR = new Data_Feasibility_Request__c();
    dataSheetAttachment pageController = new dataSheetAttachment(new ApexPages.StandardController(myDFR));
  
    pageController.myAttachment.Name = 'foo';
    pageController.fileBody=Blob.valueOf('Body Test');
    pageController.fileName = 'Test';
    pageController.save();
  
    }

}

Wondering if someone might be able to help me figure out what I might be doing incorrect?