Both APIs fail when the key or value contain vertical tab. Fix that

by adding escape sequencing for vertical tab

Add two unit tests to validate this scenario.
Fixes: ibmruntimes#31

test/test-parse-verticaltab.js

@@ -0,0 +1,22 @@
+'use strict';
+
+const yj = require('../index');
+const tap = require('tap');
+
+//string with nested quotes
+const str = '{"name":"Ila Gould","age":22,"gender":"female","nested":"\\u000bcheck"}';
+
+yj.parseAsync(str, (error, obj) => {
+ if (!error){
+ tap.equal(str,JSON.stringify(obj));
+ yj.stringifyAsync(obj,(err,data) => {
+ if(!err){
+ tap.equal(data,str);
+ }
+ else
+ tap.fail(err);
+ })
+ }
+ else
+ tap.fail(error);
+});

test/test-stringify-verticaltab.js

@@ -0,0 +1,27 @@
+'use strict';
+
+const yj = require('../index');
+const tap = require('tap');
+
+//Object with nested quotes
+const obj = {
+ name: 'Jacqueline Poole',
+ gender: 'female',
+ age: 40,
+ a:"\vb"
+};
+
+yj.stringifyAsync(obj, (err, str) => {
+ if (!err){
+ tap.equal(JSON.stringify(obj), str);
+ yj.parseAsync(str,(error,data) => {
+ if(!error){
+ tap.same(data,obj);
+ }
+ else
+ tap.fail(error);
+})
+ }
+ else
+ tap.fail(err);
+});

yieldable-stringify.js

@@ -47,6 +47,7 @@ let normalize = (string, flagN) => {
  '\n': '\\n',
  '\f': '\\f',
  '\r': '\\r',
+ '\v': '\\u000b',
  '"': '\\"',
  };
  // Escape is implemented globally