escapeJavaScript doesn't escape quotes

[jlongman]

It looks to me like the table used to do the conversion has the wrong value for the " symbol. see https://github.com/ToQoz/api-gateway-mapping-template/blob/master/index.js#L164

var escapeJavaScriptTable = {
  '"': '\"',    // 2.a
  '\\': '\\\\',

but should be

var escapeJavaScriptTable = {
  '"': '\\"',    // 2.a
  '\\': '\\\\',

note the extra backslash. I tested this in a debugger and overrode the value in the table to the doubly-escaped value and my tests passed. Additionally I sent it to apigw->dynamodb and the value was correct.

---

Given, in the template:
"categories": {"S": "$util.escapeJavaScript($input.json('$.categories'))"}
I expect my output to look like:
"categories":{\"pwa\":{\"id\":\"pwa\",\"title\":\"Progressive Web App\"[...]
but it looks like
"categories":{"pwa":{"id":"pwa","title":"Progressive Web App"[...]

My test looks like:

test('complete APRT VLT', () => {
  const context = {
    requestId: 'externally-specified-value',
  };
  const categories = {
    pwa: {
      id: 'pwa',
      title: 'Progressive Web App',
      score: '0.33',
    },
//.. cut
  };
  const body = {
    auditId: 'body-specified-value',
    categories,
//.. cut
  };
  const jsonBody = JSON.stringify(body);
  const result = mappingTemplate({ template: vtl, payload: jsonBody, context });
  expect(result).toBeDefined();
  expect(result).not.toEqual('');
  const json = JSON.parse(result);
  expect(json).toBeDefined();
  expect(json.categories).toBe(categories); // TODO richer test suite

Using the same template with APIGW to dynamodDB, when I push the object then do a GetItem on it I get:

{
    "Item": {
        "auditId": {
            "S": "09fe9c66-a508-447c-8878-a7de1503e88c"
        },
        "categories": {
            "S": "{\"pwa\":{\"id\":\"pwa\",\"title\":\"Progressive Web App\",\"score\":0.33}, //etc
        },

Ie the object is correctly escaped.

[jlongman]

I am happy to create a PR, but how active is this project?

I note that 0.0.8 is listed in npm but only 0.07 is shown as released on github?