sample course selling api (express)

Introduction

A simple sample CRUD application and see how seamlessly Keploy integrates with Express and MongoDB. Buckle up, it's gonna be a fun ride! 🎢

🛠️ Platform-Specific Requirements for Keploy

Below is a table summarizing the tools needed for both native and Docker installations of Keploy on MacOS, Windows, and Linux:

Operating System	Without Docker	Docker Installation	Prerequisites
MacOS			Docker Desktop version must be 4.25.2 or above
Windows			- Use WSL wsl --install - Windows 10 version 2004 and higher (Build 19041 and higher) or Windows 11
Linux			Linux kernel 5.15 or higher

On MacOS and Windows, additional tools are required for Keploy due to the lack of native eBPF support.

Keploy Installation

Quick Installation Using CLI

Let's get started by setting up the Keploy alias with this command:

 curl --silent -O -L https://keploy.io/install.sh && source install.sh

You should see something like this:

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       ▓█████████▌▓▓   ██▓█▄  ▓█▄▓▓ ▐█▌  ██ ▓█  █▌  ██  █▌ █▓
      ▓▓▓▓▀▀▀▀▓▓▓▓▓▓▌  ██  █▓  ▓▌▄▄ ▐█▓▄▓█▀ █▓█ ▀█▄▄█▀   █▓█
       ▓▌                           ▐█▌                   █▌
        ▓

Keploy CLI

Available Commands:
  example           Example to record and test via keploy
  config --generate generate the keploy configuration file
  record            record the keploy testcases from the API calls
  test              run the recorded testcases and execute assertions
  update            Update Keploy

Flags:
      --debug     Run in debug mode
  -h, --help      help for keploy
  -v, --version   version for keploy

Use "keploy [command] --help" for more information about a command.

🎉 Wohoo! You are all set to use Keploy.

Other Installation Methods

Install using Docker

Downloading and running Keploy in Docker

On macOS

Note : Keploy is not supported natively on MacOS, so you can follow the below method to run with docker

1. Open up a terminal window.

2. Create a bridge network in Docker using the following docker network create command:

docker network create keploy-network

3. Run the following command to start the Keploy container:

alias keploy="docker run --name keploy-v2 -p 16789:16789 --network keploy-network --privileged --pid=host -v $(pwd):$(pwd) -w $(pwd) -v /sys/fs/cgroup:/sys/fs/cgroup -v /sys/kernel/debug:/sys/kernel/debug -v /sys/fs/bpf:/sys/fs/bpf -v /var/run/docker.sock:/var/run/docker.sock --rm ghcr.io/keploy/keploy"

Running Keploy Natively on MacOS by setting up a linux env

Downloading and running Keploy in Native using Debian on MacOS

1. Open the terminal Session.
2. Run the following command

limactl show-ssh --format=config debian-12 & add it to its ssh config

3. Open a remote window on your code editor
4. Click on connect to host
5. Now select the configured SSH as "lima-debian"
6. Once you are in the terminal run the following commands to go into your directory

cd /Users

cd /{Username}

7. Run the following command to install Keploy

curl --silent --location "https://github.com/keploy/keploy/releases/latest/download/keploy_linux_arm64.tar.gz" | tar xz --overwrite -C /tmp
sudo mkdir -p /usr/local/bin && sudo mv /tmp/keploy /usr/local/bin/keploy

8. Run the following command to install Zsh

sudo apt-get -y install zsh

Why? : zsh (Z Shell) is an advanced shell that offers enhanced features compared to the default bash shell. It provides better autocompletion, advanced globbing, improved history management, and more customization options.

9. Install Git

sudo apt-get -y install git

10. Install 'Oh-my-zsh'

sh -c "$(wget https://raw.githubusercontent.com/ohmyzsh/ohmyzsh/master/tools/install.sh -O -)"

Why? : oh-my-zsh is a framework for managing your zsh configuration. It comes with a collection of plugins, themes, and helpful features that enhance the zsh experience.

11. Commands to Install docker

sudo apt-get -y update

sudo apt-get -y install ca-certificates curl

sudo install -m 0755 -d /etc/apt/keyrings

sudo curl -fsSL https://download.docker.com/linux/debian/gpg -o /etc/apt/keyrings/docker.asc

sudo chmod a+r /etc/apt/keyrings/docker.asc

echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/debian \
  $(. /etc/os-release && echo "$VERSION_CODENAME") stable" | \
  sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

sudo apt-get -y update

sudo apt-get -y update

sudo apt-get -y install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin

12. Add docker to sudoers

sudo groupadd docker

sudo gpasswd -a $USER docker

Downloading and running Keploy in Native

Downloading and running Keploy in Native

Prequisites:

• Linux Kernel version 5.15 or higher
• Run uname -a to verify the system architecture.
• In case of Windows, use WSL with Ubuntu 20.04 LTS or higher.

Downloading and running Keploy On WSL/Linux AMD

On WSL/Linux AMD

1. Open the terminal Session.
2. Run the following command to download and install Keploy:

curl --silent --location "https://github.com/keploy/keploy/releases/latest/download/keploy_linux_amd64.tar.gz" | tar xz --overwrite -C /tmp
sudo mkdir -p /usr/local/bin && sudo mv /tmp/keploy /usr/local/bin/keploy

On WSL/Linux ARM

1. Open the terminal Session
2. Run the following command to download and install Keploy:

curl --silent --location "https://github.com/keploy/keploy/releases/latest/download/keploy_linux_arm64.tar.gz" | tar xz --overwrite -C /tmp
sudo mkdir -p /usr/local/bin && sudo mv /tmp/keploy /usr/local/bin/keploy

Note: Keploy is not supported on MacOS natively.

Setting up the Docker Desktop for WSL 2

1. Install Docker Desktop for Windows from here.

When developing on Windows with Docker Desktop and WSL 2, it's crucial to configure Docker Desktop to allow WSL 2 distributions to access the Docker daemon. This setup enables seamless integration between your Windows environment, WSL 2 Linux distros, and Docker.

By default, Docker Desktop may not be configured to work with all WSL 2 distros out of the box. Proper configuration ensures that you can run Docker commands from within your WSL 2 environment, allowing for a more native Linux development experience while leveraging the power of Windows.

This setup is essential for Keploy to function correctly in a WSL 2 environment, as it needs to interact with the Docker daemon to manage containers and networks effectively. For detailed instructions on how to configure Docker Desktop for WSL 2, please refer to the official Docker documentation.

With Arkade

With Arkade

1. Installing Arkade

# Note: you can also run without `sudo` and move the binary yourself
curl -sLS https://get.arkade.dev | sudo sh

arkade --help
ark --help  # a handy alias

# Windows users with Git Bash
curl -sLS https://get.arkade.dev | sh

2. Install Keploy

arkade get keploy

Or you can also download specific version of Keploy using the following command:

arkade get keploy@2.2.0-alpha23

Get Started! 🎬

Clone the repository and move to express-mongoose folder

git clone https://github.com/keploy/samples-typescript && cd samples-typescript/node-mongoose

# Install the dependencies
npm install

Lights, Camera, Record! 🎥

Docker installation and running the mongodb compass

Here I'm using WSL , so follow below steps to configure docker with mongo db compass

1. Install docker in your windows and follow this tutorial to connect with mongodb compass :

https://www.youtube.com/watch?v=NEPZqSvKx40&list=PLff_PESolMjuDXQdjiqYRW_GnDQjU32QX

2. after installing docker and running those commands in video use this command as well to create a network:

docker network create keploy-network

*url should look something like this depending on your connection you can adjust, also update your .env file with mongodb_url:mongodb://127.0.0.1:27023/courses.

Capturing Testcases

keploy record -c "npm start"

if using wsl use this :

sudo -E env PATH=$PATH keploy record -c 'npm start'

🔥 Challenge time! Generate some test cases. How? Just make some API calls. Postman, Hoppscotch or even curl - take your pick!

Let's generate the testcases.

Make API Calls using Hoppscotch, Postman or cURL command. Keploy with capture those calls to generate the test-suites containing testcases and data mocks.

🎉 Woohoo! With a simple API call, you've crafted a test case with a mock! Dive into the Keploy directory and feast your eyes on the newly minted test-1.yml and mocks.yml after doing below steps

Time to perform API magic! Follow the breadcrumbs... or Make more API Calls

Some api calls you can make

Get request - Get all courses

curl --request GET \
--url http://localhost:3000/courses

Post request - Add a new course

curl --location 'http://localhost:3000/courses' \
--header 'Content-Type: application/x-www-form-urlencoded' \
--data-urlencode 'title=react advance' \
--data-urlencode 'description=advance' \
--data-urlencode 'price=1000' \
--data-urlencode 'published=true'

Put request - Add a new course

• Make sure to replace id of course

curl --location --request PUT 'http://localhost:3000/courses/6626a9cd3840cb305c0a6d52' \
--header 'Content-Type: application/x-www-form-urlencoded' \
--data-urlencode 'title=react advance'

Delete request - Delete a course

• Make sure to replace id of course

curl --location --request DELETE 'http://localhost:3000/courses/6626a9cd3840cb305c0a6d52'

🎉 Easy right! Just one API call and you've whipped up a test case with a mock. Check out the Keploy directory to find your shiny new test-1.yml and mocks.yml files.

version: api.keploy.io/v1beta1
kind: Http
name: test-1
spec:
  metadata: {}
  req:
    method: GET
    proto_major: 1
    proto_minor: 1
    url: http://localhost:3000/courses
    header:
      Accept: "*/*"
      Accept-Encoding: gzip, deflate, br
      Cache-Control: no-cache
      Connection: keep-alive
      Host: localhost:3000
      Postman-Token: 61d4ef71-85a9-4dd9-b036-6beb0136c8d7
      User-Agent: PostmanRuntime/7.32.1
    body: ""
    timestamp: 2024-04-22T23:56:36.910408265+05:30
  resp:
    status_code: 200
    header:
      Access-Control-Allow-Origin: "*"
      Connection: keep-alive
      Content-Length: "740"
      Content-Type: application/json; charset=utf-8
      Date: Mon, 22 Apr 2024 18:26:36 GMT
      Etag: W/"2e4-bpK0GltUbFpXKUMEiWddtMBI/a4"
      Keep-Alive: timeout=5
      X-Powered-By: Express
    body: '{"courses":[{"_id":"66269dd4a16b2f11f9c1c0e9","title":"python course","description":"advance","price":1000,"published":true,"__v":0},{"_id":"66269e13a16b2f11f9c1c0ec","title":"react course","description":"advance","price":1000,"published":true,"__v":0},{"_id":"66269f2034c9140719a0f7de","title":"express","description":"advance","price":1000,"published":true,"__v":0},{"_id":"6626a8f2946288ed91737eb7","title":"express and react","description":"advance","price":1000,"published":true,"__v":0},{"_id":"6626a9cd3840cb305c0a6d52","title":"react and next js","description":"advance","price":1000,"published":true,"__v":0},{"_id":"6626aa43f9602455c7dac9ea","title":"react advance","description":"advance","price":1000,"published":true,"__v":0}]}'
    status_message: OK
    proto_major: 0
    proto_minor: 0
    timestamp: 2024-04-22T23:56:38.951925148+05:30
  objects: []
  assertions:
    noise:
      header.Date: []
  created: 1713810398
curl: |
  curl --request GET \
    --url http://localhost:3000/courses \
    --header 'Connection: keep-alive' \
    --header 'User-Agent: PostmanRuntime/7.32.1' \
    --header 'Accept: */*' \
    --header 'Cache-Control: no-cache' \
    --header 'Postman-Token: 61d4ef71-85a9-4dd9-b036-6beb0136c8d7' \
    --header 'Host: localhost:3000' \
    --header 'Accept-Encoding: gzip, deflate, br' \

Or simply wander over to your browser and visit http://localhost:3000/courses.

Did you spot the new test and mock scrolls in your project library? Awesome! 👏

Run Tests

Time to put things to the test 🧪

keploy test -c "npm start" --delay 10

If using wsl use this :

keploy -E env PATH=$PATH keploy test -c 'npm start' --delay 10

Keploy test report:

The --delay flag? Oh, that's just giving your app a little breather (in seconds) before the test cases come knocking.

To Run test using jest use this command :

npm test

jest test coverage report :

Get Keploy jest sdk

npm i @keploy/sdk nyc jest

Update package file

Update the package.json file that runs the application:

 "scripts": {
    //other scripts
    "test": "jest --coverage --collectCoverageFrom='src/**/*.{js,jsx}'",
    "coverage": "nyc npm test && npm run coverage:merge && npm run coverage:report",
    "coverage:merge": "mkdir -p ./coverage && nyc merge ./coverage .nyc_output/out.json",
    "coverage:report": "nyc report --reporter=lcov --reporter=text"
    //other scripts
  }

Usage

For the code coverage for the keploy API tests using the jest integration, you need to add the following test to your Jest test file. It can be called as keploy.test.js. Jest test file. It can be called as keploy.test.js.

const {expect} = require("@jest/globals");
const keploy = require("@keploy/sdk");
const timeOut = 300000;

describe(
  "Keploy Server Tests",
  () => {
    test(
      "TestKeploy",
      (done) => {
        const cmd = "npm start";
        const options = {};
        keploy.Test(cmd, options, (err, res) => {
          if (err) {
            done(err);
          } else {
            expect(res).toBeTruthy(); // Assert the test result
            done();
          }
        });
      },
      timeOut
    );
  },
  timeOut
);

Now let's run jest tests along keploy using command

npm test

To get Combined coverage with keploy test coverage

npm run coverage

Wrapping it up 🎉

Congrats on the journey so far! You've seen Keploy's power, flexed your coding muscles, and had a bit of fun too! Now, go out there and keep exploring, innovating, and creating! Remember, with the right tools and a sprinkle of fun, anything's possible.😊🚀

Happy coding! ✨👩‍💻👨‍💻✨