Sample code using Laravel, PHPUnit and Mockery

Sample.php

/**
 * Show the form for editing the specified resource.
 *
 * @param  int  $id
 * @return \Illuminate\Http\Response
 */
public function edit($id)
{
    $contact = Contact::find($id);

    //When you can not find the record, back to the home.
    if($contact === null){
            return redirect('/contacts');
    }
    return view('contacts.edit', compact('contact'));
}