fix #133

Author: jeremydaly

index.js

@@ -26,7 +26,7 @@ class API {
     this._callbackName = props && props.callback ? props.callback.trim() : 'callback'
     this._mimeTypes = props && props.mimeTypes && typeof props.mimeTypes === 'object' ? props.mimeTypes : {}
     this._serializer = props && props.serializer && typeof props.serializer === 'function' ? props.serializer : JSON.stringify
-    this._errorHeaderWhitelist = props && (props.errorHeaderWhitelist || []).map(header => header.toLowerCase())
+    this._errorHeaderWhitelist = props && Array.isArray(props.errorHeaderWhitelist) ? props.errorHeaderWhitelist.map(header => header.toLowerCase()) : []
 
     // Set sampling info
     this._sampleCounts = {}

test/errorHandling.js

@@ -10,6 +10,7 @@ const api3 = require('../index')({ version: 'v1.0' })
 const api4 = require('../index')({ version: 'v1.0' })
 const api5 = require('../index')({ version: 'v1.0', logger: { access: 'never' }})
 const api_errors = require('../index')({ version: 'v1.0' })
+const api6 = require('../index')() // no props
 
 class CustomError extends Error {
   constructor(message,code) {
@@ -172,6 +173,10 @@ api_errors.get('/responseError', (req,res) => {
   res.redirect(310,'http://www.google.com')
 })
 
+api6.get('/testError', function(req,res) {
+  res.error('This is a test error message')
+})
+
 
 /******************************************************************************/
 /***  BEGIN TESTS                                                           ***/
@@ -320,6 +325,17 @@ describe('Error Handling Tests:', function() {
       expect(_log.msg).to.equal('This is a custom error')
     }) // end it
 
+
+    it('Error, no props', async function() {
+      let _log
+      let _event = Object.assign({},event,{ path: '/testError'})
+      let logger = console.log
+      console.log = log => { try { _log = JSON.parse(log) } catch(e) { _log = log } }
+      let result = await new Promise(r => api6.run(_event,{},(e,res) => { r(res) }))
+      console.log = logger
+      expect(result).to.deep.equal({ multiValueHeaders: { 'content-type': ['application/json'] }, statusCode: 500, body: '{"error":"This is a test error message"}', isBase64Encoded: false })
+    }) // end it
+
   })
 
 }) // end ERROR HANDLING tests