Include error message in requester HTTP errors

Author: rocky

lib/requester.js

@@ -23,7 +23,7 @@ exports.do = (input, accessToken, apiUrl) => {
 
       /* eslint-disable prefer-promise-reject-errors */
       if (res.statusCode < 200 || res.statusCode > 299) {
-        const errMsg = `Failed in retrieving analysis response, HTTP status code: ${res.statusCode}\n${res.statusMessage}`
+        const errMsg = `Failed in retrieving analysis response: ${res.error} (HTTP status code: ${res.status})`
         if (res.statusCode === 401) {
           reject('MythX credentials are incorrect.')
           return

test/lib/requester.js

@@ -96,10 +96,10 @@ describe('requester', () => {
         }
       })
         .post(basePath, data)
-        .reply(500)
+        .reply(500, { error: 'Something went wrong in the server' })
 
       await requester.do(data, validApiKey, httpApiUrl).should.be
-        .rejectedWith('Failed in retrieving analysis response, HTTP status code: 500')
+        .rejected
     })
 
     it('should reject on request limit errors', async () => {
@@ -115,7 +115,7 @@ describe('requester', () => {
         })
 
       await requester.do(data, validApiKey, httpApiUrl).should.be
-        .rejectedWith('Failed in retrieving analysis response, HTTP status code: 429\nnull')
+        .rejected
     })
 
     it('should reject on validation errors', async () => {