generate new test that did already exist & update all module snippets with declaration

test/dropElements/dropElements.js

@@ -1,4 +1,4 @@
-module.exports = (arr, func) => {
+module.exports = dropElements = (arr, func) => {
 while (arr.length > 0 && !func(arr[0])) arr = arr.slice(1);
 return arr;
 };