📝 Added sandbox (code sketchbook)

sandbox/mocha/package.json

@@ -0,0 +1,18 @@
+{
+  "name": "mocha",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "directories": {
+    "test": "test"
+  },
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "mocha": "^10.0.0"
+  }
+}

sandbox/mocha/test/test.js

@@ -0,0 +1,8 @@
+var assert = require('assert')
+describe('Array', function() {
+    describe('#indexOf()', function() {
+        it('should return -1 when the value is not present', function() {
+            assert.equal([1, 2, 3].indexOf(4), -1)
+        })
+    })
+})