also error strings have to be json-stringified

Author: ujann

lib/proxyIntegration.js

@@ -80,9 +80,9 @@ function normalizeRequestPath(event) {
 
 function convertError(error, errorMapping, headers) {
         if (typeof error.reason === 'string' && errorMapping && errorMapping[error.reason]) {
-            return {statusCode: errorMapping[error.reason], body: error.message, headers: headers};
+            return {statusCode: errorMapping[error.reason], body: JSON.stringify(error.message), headers: headers};
         }else if(typeof error.status === 'number'){
-            return {statusCode: error.status, body: error.message, headers: addCorsHeaders({})};
+            return {statusCode: error.status, body: JSON.stringify(error.message), headers: addCorsHeaders({})};
         }
         try{
             return {statusCode: 500, body: `Generic error: ${JSON.stringify(error)}`, headers: addCorsHeaders({})};

test/proxyIntegration.spec.js

@@ -306,7 +306,7 @@ describe('proxyIntegration.routeHandler', () => {
         proxyIntegration(routeConfig, {path: '/', httpMethod: 'GET'}).then(result => {
             expect(result).toEqual({
                 statusCode: 501,
-                body: 'bla',
+                body: '"bla"',
                 headers: Object.assign({"Content-Type": "application/json"}, expectedCorsHeaders)
             });
             done();
@@ -350,7 +350,7 @@ describe('proxyIntegration.routeHandler', () => {
         proxyIntegration(routeConfig, {path: '/', httpMethod: 'GET'}).then(result => {
             expect(result).toEqual({
                 statusCode: 666,
-                body: {reason: 'oops'},
+                body: '{"reason":"oops"}',
                 headers: expectedCorsHeaders
             });
             done();
@@ -384,7 +384,7 @@ describe('proxyIntegration.routeHandler.returnvalues', () => {
         proxyIntegration(routeConfig, {path: '/', httpMethod: 'GET'}).then(result => {
             expect(result).toEqual({
                 statusCode: 599,
-                body: 'doof',
+                body: '"doof"',
                 headers: {"Content-Type": "application/json"}
             });
             done();