clear test user data

app/Invoice.php

@@ -19,4 +19,12 @@ class Invoice extends Model
     public function invoiceStatuses() {
         return $this->hasMany(InvoiceStatuses::class);
     }
+
+    public function delete()
+    {
+        $this->invoiceDetails()->delete();
+        $this->invoiceStatuses()->delete();
+
+        return parent::delete();
+    }
 }