NodeJS Sample Application

Intoduction 📌

A sample CRUD application to see how Keploy integrates effortlessly with Express.js and MongoDB. Get ready to see the power of Keploy 🔅🔅.

Get Started! 🎬

Clone the repository and move to crud-API folder

git clone https://github.com/keploy/samples-typescript && cd samples-typescript/crud-API

# Install the dependencies
npm install

🛠️ 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.

Quick Installation

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:

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

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

Downloading and running Keploy in Docker

On macOS

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"

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.

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.

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

🎉 Wohoo! We are all set to use Keploy.

🎬 Capturing Testcases

To begin recording your application's API calls, open your terminal and navigate to your application directory using the cd command. Then, execute the following command:

keploy record -c "npm start"

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

1. Give Product details
POST REQUEST

curl --request POST \
  --url http://localhost:3000/api/products \
  --header 'content-type: application/json' \
  --data '{
    "name" : "airpods",
    "quantity": 4,
    "price": 20000
}'

Here's a response of what you get:

{
  "name": "airpods",
  "quantity": 4,
  "price": 20000,
  "_id": "6629499175a4795410ee4012",
  "createdAt": "2024-04-24T18:04:01.499Z",
  "updatedAt": "2024-04-24T18:04:01.499Z",
  "__v": 0
}

2. Get the Product details
GET REQUEST

curl --location --request GET 'http://localhost:3000/api/products/:id'

Replace the :id, with the id of the product of which you want the details in the upcoming API request!

3. Update the Product details
PUT REQUEST

curl --location --request PUT 'http://localhost:3000/api/products/:id' \
  --header 'Content-Type: application/json' \
  --data '{
    "name": "airpods",
    "quantity": 4,
    "price": 20000
    }'

4. Delete a Product details
DELETE REQUEST

curl --location --request DELETE 'http://localhost:8080/potions/:id'

🎉 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/
    header:
      Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8
      Accept-Encoding: gzip, deflate, br
      Accept-Language: en-GB,en
      Connection: keep-alived
      Host: localhost:3000
      If-None-Match: W/"22-1zTtRKCtWDH+a9AlmEC9xS1mvKM"
      Sec-Ch-Ua: '"Chromium";v="122", "Not(A:Brand";v="24", "Brave";v="122"'
      Sec-Ch-Ua-Mobile: ?0
      Sec-Ch-Ua-Platform: '"Linux"'
      Sec-Fetch-Dest: document
      Sec-Fetch-Mode: navigate
      Sec-Fetch-Site: none
      Sec-Fetch-User: ?1
      Sec-Gpc: "1"
      Upgrade-Insecure-Requests: "1"
      User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36
    body: ""
    timestamp: 2024-04-22T14:59:23.376284154+05:30
  resp:
    status_code: 304
    header:
      Connection: keep-alive
      Date: Mon, 22 Apr 2024 09:29:23 GMT
      Etag: W/"22-1zTtRKCtWDH+a9AlmEC9xS1mvKM"
      Keep-Alive: timeout=5
      X-Powered-By: Express
    body: ""
    status_message: Not Modified
    proto_major: 0
    proto_minor: 0
    timestamp: 2024-04-22T14:59:23.516347365+05:30
  objects: []
  assertions:
    noise:
      header.Date: []
  created: 1713778163
curl: |
  curl --request GET \
    --url http://localhost:3000/ \
    --header 'Sec-Fetch-User: ?1' \
    --header 'Sec-Fetch-Dest: document' \
    --header 'Upgrade-Insecure-Requests: 1' \
    --header 'Sec-Gpc: 1' \
    --header 'Accept-Encoding: gzip, deflate, br' \
    --header 'Sec-Fetch-Mode: navigate' \
    --header 'Accept-Language: en-GB,en' \
    --header 'Host: localhost:3000' \
    --header 'If-None-Match: W/"22-1zTtRKCtWDH+a9AlmEC9xS1mvKM"' \
    --header 'Sec-Ch-Ua-Mobile: ?0' \
    --header 'User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36' \
    --header 'Sec-Fetch-Site: none' \
    --header 'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8' \
    --header 'Connection: keep-alive' \
    --header 'Sec-Ch-Ua: "Chromium";v="122", "Not(A:Brand";v="24", "Brave";v="122"' \
    --header 'Sec-Ch-Ua-Platform: "Linux"' \

Run keploy test

Want to see it in action? Run the following command to execute your Keploy tests

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

Great job following along 🥳! Now, let's dive deeper and explore how to do Keploy integration with jest test 📌

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 🎉

Congratulations! You've conquered Keploy and unleashed its power for effortless testing in your NodeJS application. With Jest by your side, you can ensure rock-solid code coverage. Time to go forth and build amazing things! 🧑🏻‍💻

Hope this helps you out, if you still have any questions, reach out to us .

Contact Us

If you have any questions or need help, please feel free to reach out to us at hello@keploy.io or reach out us on or open a discussion on