added enhancements about cloud functions testing into readme file

Author: jfocco

README.md

@@ -23,6 +23,7 @@ Boilerplate with React ⚛️ and Firebase 🔥designed to quickly spin up a ful
   - [Unit Testing](#unit-testing)
   - [Linting](#linting)
   - [Cloud functions](#cloud-functions)
+  - [Unit Testing](#unit-testing-1)
 - [Prerequisites](#prerequisites)
 - [Getting started](#getting-started)
   - [Setting up the Firebase project locally](#setting-up-the-firebase-project-locally)
@@ -42,7 +43,7 @@ Boilerplate with React ⚛️ and Firebase 🔥designed to quickly spin up a ful
   - [Selecting an alias](#selecting-an-alias)
   - [Creating a new cloud function](#creating-a-new-cloud-function)
   - [Testing functions locally](#testing-functions-locally)
-  - [Testing functions in online mode](#testing-functions-online)
+  - [Testing functions in online mode](#testing-functions-in-online-mode)
   - [Deployment](#deployment)
 - [Continuous integration/deployment](#continuous-integrationdeployment)
   - [Workflows folder structure](#workflows-folder-structure)
@@ -59,7 +60,7 @@ Boilerplate with React ⚛️ and Firebase 🔥designed to quickly spin up a ful
   - [How to internationalize a Date](#how-to-internationalize-a-date)
   - [How to add your language on DatePicker](#how-to-add-your-language-on-datepicker)
 - [File Upload](#file-upload)
-  - [Image Resize](#image-resize)
+  - [Image resize extension](#image-resize-extension)
   - [Storage Rules](#storage-rules)
 - [Contributors](#contributors)
 - [License](#license)
@@ -146,9 +147,13 @@ React Firebase Admin is our in-house admin dashboard boilerplate, used in many o
 - [Camelcase](https://github.com/sindresorhus/camelcase) (★ 423) convert a dash/dot/underscore/space separated string to camelCase.
 - [Resize Image](https://github.com/firebase/extensions/tree/master/storage-resize-images) (★ 372) Firebase Extension to create resized versions of images uploaded to Cloud Storage.
 
-### Unit Testing
+#### Unit Testing
 
 - [Firebase-functions-test](https://github.com/firebase/firebase-functions-test) (★ 117) unit testing library for Cloud Functions for Firebase.
+- [Mocha](https://github.com/mochajs/mocha) (★ 19.4k) simple, flexible, fun javascript test framework for node.js & the browser.
+- [Chai](https://github.com/chaijs/chai) (★ 6.8k) BDD / TDD assertion framework for node.js and the browser that can be paired with any testing framework.
+- [Chai-as-promised](https://github.com/domenic/chai-as-promised/) (★ 1.4k) Extends Chai with assertions about promises.
+- [Ts-node](https://github.com/TypeStrong/ts-node) (★ 7k) TypeScript execution and REPL for node.js, with source map support.
 
 ## Prerequisites
 
@@ -332,8 +337,20 @@ functions/
 │     │   ... storage functions ...
 │     ├── https/
 │     │    ├── createUser.function.ts
-│     │     └── ... other https functions ...
+│     │    └── ... other https functions ...
 │     └── index.ts
+├── test/
+│     ├── db/
+│     │    ├── users/
+│     │    ├── onDelete.test.ts
+│     │    ├── onUpdate.test.ts
+│     │    └── ... other database tests ...
+│     ├── https/
+│     │    ├── createUser.test.ts
+│     │    └── ... other https tests ...
+│     └── util/
+│          ├── config.ts
+│
 ```
 
 ### Installing dependencies
@@ -415,9 +432,15 @@ Testing your cloud functions online is very simple and easy.
 
 For that, you only have to set the variables localted in the env.example.json inside /functions folder. (Remember to rename the file to env.json)
 
-After that, navigate to the /functions folder and execute **npm test** in your terminal.
+Follow these steps for setting up your env.json file:
+
+- The first 3 properties **_"databaseURL"_**, **_"storageBucket"_** and **_"projectId"_** are the same ones previously added to the frontend .env file.
+- For **_"serviceAccountKey"_** you should do the following:
+  - Go to your proyect in the Firebase dashboard, click on **_Project settings_** and then click on **_Service accounts_** tab.
+  - After that you'll be able to click on **_Generate new private key_** button and a json file containing your service account's credentials will be downloaded.
+  - Place that file in your project and include the location of it into the **_"serviceAccountKey"_** in your env.json file.
 
-Note: For finding your service account key you should go to your proyect in the Firebase dashboard, click on **_Project settings_** and then click on **_Service accounts_** tab. After that you'll be able to click on **_Generate new private key_** button and a json file containing your service account's credentials will be downloaded. Place that file in your project and include the location of it into the **_"serviceAccountKey"_** in your env.json file.
+After that, open your terminal, navigate to the /functions folder and execute **npm test**.
 
 _Warning: Use extra caution when handling service account credentials in your code. Do not commit them to a public repository, deploy them in a client app, or expose them in any way that could compromise the security of your Firebase project._