Minor fixes for expenses

app/Filters/ExpenseFilters.php

@@ -106,6 +106,12 @@ class ExpenseFilters extends QueryFilters
         return $this->builder;
     }
 
+    /**
+     * Filter expenses that only have invoices
+     *
+     * @param string $value
+     * @return Builder
+     */
     public function has_invoices(string $value = ''): Builder
     {
         if ($value == 'true') {

tests/Feature/ExpenseApiTest.php

@@ -31,6 +31,8 @@ class ExpenseApiTest extends TestCase
     use DatabaseTransactions;
     use MockAccountData;
 
+    public $faker;
+    
     protected function setUp() :void
     {
         parent::setUp();