JS: Add test for fastify-rate-limit

Author: asgerf

javascript/ql/test/query-tests/Security/CWE-770/MissingRateLimiting.expected

@@ -8,3 +8,4 @@
 | tst.js:38:20:38:36 | expensiveHandler4 | This route handler performs $@, but is not rate-limited. | tst.js:17:40:17:83 | connect ... ution') | a database access |
 | tst.js:64:25:64:63 | functio ... req); } | This route handler performs $@, but is not rate-limited. | tst.js:64:46:64:60 | verifyUser(req) | authorization |
 | tst.js:76:25:76:53 | catchAs ... ndler1) | This route handler performs $@, but is not rate-limited. | tst.js:14:40:14:46 | login() | authorization |
+| tst.js:88:24:88:40 | expensiveHandler1 | This route handler performs $@, but is not rate-limited. | tst.js:14:40:14:46 | login() | authorization |

javascript/ql/test/query-tests/Security/CWE-770/tst.js

@@ -82,3 +82,9 @@ function errorHandler(req, res, next) {
   next(makeOAuthError(req, res));
 }
 express().use(errorHandler); // OK - does not perform authentication
+
+const fastifyApp = require('fastify')();
+
+fastifyApp.get('/foo', expensiveHandler1); // NOT OK
+fastifyApp.register(require('fastify-rate-limit'));
+fastifyApp.get('/bar', expensiveHandler1); // OK