From 3d99b41252afd108c14583383f0fd6b02b21537c Mon Sep 17 00:00:00 2001
From: James Littlejohn <thessem@gmail.com>
Date: Fri, 21 Jul 2017 10:57:52 +1000
Subject: [PATCH] Add test

---
 expressions/expressions_test.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/expressions/expressions_test.go b/expressions/expressions_test.go
index 033ee49..f381c52 100644
--- a/expressions/expressions_test.go
+++ b/expressions/expressions_test.go
@@ -1,6 +1,7 @@
 package expressions
 
 import (
+	"errors"
 	"fmt"
 	"strings"
 	"testing"
@@ -134,6 +135,10 @@ func TestEvaluateString(t *testing.T) {
 
 	_, err = EvaluateString("1 | undefined_filter", ctx)
 	require.Error(t, err)
+
+	cfg.AddFilter("error", func(input interface{}) (string, error) { return "", errors.New("test error") })
+	_, err = EvaluateString("1 | error", ctx)
+	require.Error(t, err)
 }
 
 func TestClosure(t *testing.T) {