Fix error throw parameter on doRequest (#353)

* Fix error throw parameter on doRequest

* stringfied error for more versatile objects, modified tests accordingly

Co-authored-by: Bruce Martin <bruce.martin@withintelligence.com>

Author: brucem1976

src/jira.js

@@ -303,7 +303,7 @@ export default class JiraApi {
 
       return response;
     } catch (e) {
-      throw new Error(e);
+      throw new Error(JSON.stringify(e));
     }
   }
 

test/jira-tests.js

@@ -299,35 +299,34 @@ describe('Jira API Tests', () => {
     it('doRequest throws an error properly', async () => {
       // eslint-disable-next-line no-underscore-dangle
       const revert = JiraApi.__set__('_request', (uri, options, callback) => {
-        callback(undefined, {
-          body: {
+        callback({
+          body: JSON.stringify({
             errorMessages: ['some error to throw'],
-          },
+          }),
         });
       });
 
       const jira = new JiraApi(getOptions());
 
       await jira.doRequest({})
-        .should.eventually.be.rejectedWith('some error to throw');
+        .should.eventually.be.rejectedWith('{"body":"{\\"errorMessages\\":[\\"some error to throw\\"]}"}');
 
       revert();
     });
 
     it('doRequest throws a list of errors properly', async () => {
       // eslint-disable-next-line no-underscore-dangle
       const revert = JiraApi.__set__('_request', (uri, options, callback) => {
-        callback(undefined, {
-          body: {
-            errorMessages: ['some error to throw', 'another error'],
-          },
+        callback({
+          body:
+            JSON.stringify({ errorMessages: ['some error to throw', 'another error'] }),
         });
       });
 
       const jira = new JiraApi(getOptions());
 
       await jira.doRequest({})
-        .should.eventually.be.rejectedWith('some error to throw, another error');
+        .should.eventually.be.rejectedWith('{"body":"{\\"errorMessages\\":[\\"some error to throw\\",\\"another error\\"]}"}');
 
       revert();
     });