There are 5 functions in this exercise:

• createObject
• findChildren
• getElement
• readFile
• say

For each function, there are associated tests that are all currently failing. To complete this exercise, make all the tests pass.

To run the tests: $ npm test

You are free to implement each function as you see fit, but none of the specs themselves are allowed to change. The specs could be a good place to get some hints for how to do your implementation. All the specs are in spec folder.

This function should take one string as an argument that returns an object with a getMessage function. When getMessage is called, it should simply return the string that was supplied to createObject. The function getMessage should be defined on the object's prototype, not the object itself.

This function takes two arguments. The first argument is a string id and the second argument is a tree object. Each node in the tree has an id and children property. children is an array of nodes that each have their on id and children property.

This function should find the node with the supplied id and return its children. If no node is found, it should return null.

This function takes a document and a valid CSS selector string as an argument. It should return the first element from the document that matches the selector. If no element is found, should return null.

This function should open a file and read its contents as JSON. The argument to this function is the path of the file to be opened. If file doesn't exist, it should reject the promise.

This function takes a single string as an argument. It's return value should allow you to supply another string that can be added to the first string.