chore(tests): add Chat model tests (#784)

* add search and status tests

* reset to previous status in test

* move version to its own test

* add tests for Chat model

* keep hooks at the top

* run tests recursively in default script

package.json

@@ -5,7 +5,8 @@
   "main": "./index.js",
   "typings": "./index.d.ts",
   "scripts": {
-    "test": "mocha tests",
+    "test": "mocha tests --recursive",
+    "test-single": "mocha",
     "shell": "node --experimental-repl-await ./shell.js",
     "generate-docs": "node_modules/.bin/jsdoc --configure .jsdoc.json --verbose"
   },