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Version: 2.0.0

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 && 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 SystemWithout DockerDocker InstallationPrerequisites
MacOS MacOSNot SupportedSupportedDocker Desktop version must be 4.25.2 or above
Windows WindowsSupportedSupported- Use WSL wsl --install
- Windows 10 version 2004 and higher (Build 19041 and higher) or Windows 11
Linux LinuxSupportedSupportedLinux 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 && source

You should see something like this:

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

Keploy CLI

Available Commands:
example Example to record and test via keploy
generate-config 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

--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.

🎉 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

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

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

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

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.

kind: Http
name: test-1
metadata: {}
method: GET
proto_major: 1
proto_minor: 1
url: http://localhost:3000/
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/ Safari/537.36
body: ""
timestamp: 2024-04-22T14:59:23.376284154+05:30
status_code: 304
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: []
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/ 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


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;

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

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! 🧑🏻‍💻