Introduction

This is a sample app to test Keploy integration capabilities using Bun.js and MongoDB.

🛠️ 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:

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

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

Open up a terminal window.
Create a bridge network in Docker using the following docker network create command:

docker network create keploy-network

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

Open the terminal Session.
Run the following command

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

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

cd /Users

cd /{Username}

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

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.

Install Git

sudo apt-get -y install git

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.

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

Add docker to sudoers

sudo groupadd docker

sudo gpasswd -a $USER docker

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

Open the terminal Session.
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

Open the terminal Session
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

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

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

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 a sample user data CRUD app 🧪

git clone https://github.com/keploy/samples-typescript && cd samples-typescript/bun-mongo

# Install the dependencies

bun install

Installation Keploy

Depending on your OS, choose your adventure:

There are 2 ways you can run this sample application.

Using Docker container for Postgres and running application locally

Running App Locally on Linux/WSL 🐧

We'll be running our sample application right on Linux, but just to make things a tad more thrilling, we'll have the database (MongoDB) chill on Docker. Ready? Let's get the party started!🎉

📼 Roll the Tape - Recording Time!

To install the dependencies

bun install

Using the docker-compose file we will start our Postgres instance:-

docker-compose up -d mongo

Ready, set, record! Here's how:

sudo -E env PATH=$PATH Keploy record -c 'bun run supabun.ts'

Keep an eye out for the -c flag! It's the command charm to run the app.

Alright, magician! With the app alive and kicking, let's weave some test cases. The spell? Making some API calls! Postman, Hoppscotch, or the classic curl - pick your wand.

Generate testcases

To generate testcases we just need to make some API calls.

1. Make a POST request

curl --request POST localhost:4200/save

2. Make a GET request

curl --request GET localhost:4200/fetch

Give yourself a pat on the back! With that simple spell, you've conjured up a test case with a mock! Explore the Keploy directory and you'll discover your handiwork in test-1.yml and mocks.yml.

version: api.keploy.io/v1beta1
kind: Http
name: test-1
spec:
  metadata: {}
  req:
    method: POST
    proto_major: 1
    proto_minor: 1
    url: http://localhost:4200/save
    header:
      Accept: "*/*"
      Host: localhost:4200
      User-Agent: curl/8.2.1
    body: ""
    timestamp: 2024-02-24T11:16:49.156825536Z
  resp:
    status_code: 200
    header:
      Access-Control-Allow-Credentials: "true"
      Access-Control-Allow-Headers: "*"
      Access-Control-Allow-Methods: POST
      Access-Control-Allow-Origin: "*"
      Access-Control-Exposed-Headers: "*"
      Content-Length: "16"
      Content-Type: application/json;charset=utf-8
      Date: Sat, 24 Feb 2024 11:16:49 GMT
      Vary: "*"
    body: '{"success":true}'
    status_message: OK
    proto_major: 0
    proto_minor: 0
    timestamp: 2024-02-24T11:16:51.280382177Z
  objects: []
  assertions:
    noise:
      header.Date: []
  created: 1708773411
curl: |
  curl --request POST \
    --url http://localhost:4200/save \
    --header 'User-Agent: curl/8.2.1' \
    --header 'Accept: */*' \
    --header 'Host: localhost:4200' \


```yaml
---
version: api.keploy.io/v1beta1
kind: Mongo
name: mock-0
spec:
    metadata:
        operation: '{ OpQuery flags: [], fullCollectionName: admin.$cmd, numberToSkip: 0, numberToReturn: -1, query: {"ismaster": {"$numberInt":"1"},"helloOk": true,"client": {"driver": {"name": "nodejs|Mongoose","version": "5.9.1|7.6.8"},"platform": "Bun v1.0.29, LE","os": {"name": "linux","architecture": "x64","version": "6.5.0-17-generic","type": "Linux"}},"compression": ["none"]}, returnFieldsSelector:  }'
        type: config
    requests:
        - header:
            length: 298
            requestId: 1
            responseTo: 0
            Opcode: 2004
          message:
            flags: 0
            collection_name: admin.$cmd
            number_to_skip: 0
            number_to_return: -1
            query: '{"ismaster":{"$numberInt":"1"},"helloOk":true,"client":{"driver":{"name":"nodejs|Mongoose","version":"5.9.1|7.6.8"},"platform":"Bun v1.0.29, LE","os":{"name":"linux","architecture":"x64","version":"6.5.0-17-generic","type":"Linux"}},"compression":["none"]}'
            return_fields_selector: ""
    responses:
        - header:
            length: 329
            requestId: 3
            responseTo: 1
            Opcode: 1
          message:
            response_flags: 8
            cursor_id: 0
            starting_from: 0
            number_returned: 1
            documents:
                - '{"helloOk":true,"ismaster":true,"topologyVersion":{"processId":{"$oid":"65d9cff2df019fd437739fbf"},"counter":{"$numberLong":"0"}},"maxBsonObjectSize":{"$numberInt":"16777216"},"maxMessageSizeBytes":{"$numberInt":"48000000"},"maxWriteBatchSize":{"$numberInt":"100000"},"localTime":{"$date":{"$numberLong":"1708773364196"}},"logicalSessionTimeoutMinutes":{"$numberInt":"30"},"connectionId":{"$numberInt":"1"},"minWireVersion":{"$numberInt":"0"},"maxWireVersion":{"$numberInt":"21"},"readOnly":false,"ok":{"$numberDouble":"1.0"}}'
          read_delay: 623599
    created: 1708773364
    reqTimestampMock: 2024-02-24T11:16:04.196109922Z
    resTimestampMock: 2024-02-24T11:16:04.197231354Z
---
version: api.keploy.io/v1beta1
kind: Mongo
name: mock-1
spec:
    metadata:
        operation: '{ OpMsg flags: 0, sections: [{ SectionSingle msg: {"create":"animals","lsid":{"id":{"$binary":{"base64":"zOPs0UhFTzaDZlU+iad5xg==","subType":"04"}}},"$db":"keploy"} }], checksum: 0 }'
    requests:
        - header:
            length: 98
            requestId: 3
            responseTo: 0
            Opcode: 2013
          message:
            flagBits: 0
            sections:
                - '{ SectionSingle msg: {"create":"animals","lsid":{"id":{"$binary":{"base64":"zOPs0UhFTzaDZlU+iad5xg==","subType":"04"}}},"$db":"keploy"} }'
            checksum: 0
          read_delay: 6520498
    responses:
        - header:
            length: 38
            requestId: 5
            responseTo: 3
            Opcode: 2013
          message:
            flagBits: 0
            sections:
                - '{ SectionSingle msg: {"ok":{"$numberDouble":"1.0"}} }'
            checksum: 0
          read_delay: 602253
    created: 1708773364
    reqTimestampMock: 2024-02-24T11:16:04.254900776Z
    resTimestampMock: 2024-02-24T11:16:04.25581579Z
---
version: api.keploy.io/v1beta1
kind: Mongo
name: mock-2
spec:
    metadata:
        operation: '{ OpMsg flags: 65536, sections: [{ SectionSingle msg: {"hello":{"$numberInt":"1"},"maxAwaitTimeMS":{"$numberInt":"10000"},"topologyVersion":{"processId":{"$oid":"65d9cff2df019fd437739fbf"},"counter":{"$numberLong":"0"}},"$db":"admin"} }], checksum: 0 }'
        type: config
    requests:
        - header:
            length: 134
            requestId: 4
            responseTo: 0
            Opcode: 2013
          message:
            flagBits: 65536
            sections:
                - '{ SectionSingle msg: {"hello":{"$numberInt":"1"},"maxAwaitTimeMS":{"$numberInt":"10000"},"topologyVersion":{"processId":{"$oid":"65d9cff2df019fd437739fbf"},"counter":{"$numberLong":"0"}},"$db":"admin"} }'
            checksum: 0
          read_delay: 531789033
    responses:
        - header:
            length: 313
            requestId: 6
            responseTo: 4
            Opcode: 2013
          message:
            flagBits: 2
            sections:
                - '{ SectionSingle msg: {"isWritablePrimary":true,"topologyVersion":{"processId":{"$oid":"65d9cff2df019fd437739fbf"},"counter":{"$numberLong":"0"}},"maxBsonObjectSize":{"$numberInt":"16777216"},"maxMessageSizeBytes":{"$numberInt":"48000000"},"maxWriteBatchSize":{"$numberInt":"100000"},"localTime":{"$date":{"$numberLong":"1708773374735"}},"logicalSessionTimeoutMinutes":{"$numberInt":"30"},"connectionId":{"$numberInt":"1"},"minWireVersion":{"$numberInt":"0"},"maxWireVersion":{"$numberInt":"21"},"readOnly":false,"ok":{"$numberDouble":"1.0"}} }'
            checksum: 0
          read_delay: 10006875186
    created: 1708773374
    reqTimestampMock: 2024-02-24T11:16:04.728966188Z
    resTimestampMock: 2024-02-24T11:16:14.736354258Z
---
version: api.keploy.io/v1beta1
kind: Mongo
name: mock-3
spec:
    metadata:
        operation: '{ OpMsg flags: 0, sections: [{ SectionSingle msg: {"ismaster":{"$numberInt":"1"},"$db":"admin"} }], checksum: 0 }'
        type: config
    requests:
        - header:
            length: 55
            requestId: 6
            responseTo: 0
            Opcode: 2013
          message:
            flagBits: 0
            sections:
                - '{ SectionSingle msg: {"ismaster":{"$numberInt":"1"},"$db":"admin"} }'
            checksum: 0
          read_delay: 10013801234
    responses:
        - header:
            length: 304
            requestId: 9
            responseTo: 6
            Opcode: 2013
          message:
            flagBits: 0
            sections:
                - '{ SectionSingle msg: {"ismaster":true,"topologyVersion":{"processId":{"$oid":"65d9cff2df019fd437739fbf"},"counter":{"$numberLong":"0"}},"maxBsonObjectSize":{"$numberInt":"16777216"},"maxMessageSizeBytes":{"$numberInt":"48000000"},"maxWriteBatchSize":{"$numberInt":"100000"},"localTime":{"$date":{"$numberLong":"1708773384750"}},"logicalSessionTimeoutMinutes":{"$numberInt":"30"},"connectionId":{"$numberInt":"3"},"minWireVersion":{"$numberInt":"0"},"maxWireVersion":{"$numberInt":"21"},"readOnly":false,"ok":{"$numberDouble":"1.0"}} }'
            checksum: 0
          read_delay: 361888
    created: 1708773384
    reqTimestampMock: 2024-02-24T11:16:24.750477084Z
    resTimestampMock: 2024-02-24T11:16:24.751206134Z
---
version: api.keploy.io/v1beta1
kind: Mongo
name: mock-4
spec:
    metadata:
        operation: '{ OpMsg flags: 0, sections: [{ SectionSingle msg: {"insert":"animals","documents":[{"name":"Cow","sound":"Moo","_id":{"$oid":"65d9d02107882a00d23b5ac0"},"__v":{"$numberInt":"0"}}],"ordered":true,"lsid":{"id":{"$binary":{"base64":"zOPs0UhFTzaDZlU+iad5xg==","subType":"04"}}},"$db":"keploy"} }], checksum: 0 }'
    requests:
        - header:
            length: 187
            requestId: 9
            responseTo: 0
            Opcode: 2013
          message:
            flagBits: 0
            sections:
                - '{ SectionSingle msg: {"insert":"animals","documents":[{"name":"Cow","sound":"Moo","_id":{"$oid":"65d9d02107882a00d23b5ac0"},"__v":{"$numberInt":"0"}}],"ordered":true,"lsid":{"id":{"$binary":{"base64":"zOPs0UhFTzaDZlU+iad5xg==","subType":"04"}}},"$db":"keploy"} }'
            checksum: 0
          read_delay: 44940206029
    responses:
        - header:
            length: 45
            requestId: 14
            responseTo: 9
            Opcode: 2013
          message:
            flagBits: 0
            sections:
                - '{ SectionSingle msg: {"n":{"$numberInt":"1"},"ok":{"$numberDouble":"1.0"}} }'
            checksum: 0
          read_delay: 4726351
    created: 1708773409
    reqTimestampMock: 2024-02-24T11:16:49.196056727Z
    resTimestampMock: 2024-02-24T11:16:49.201252579Z
---
version: api.keploy.io/v1beta1
kind: Mongo
name: mock-5
spec:
    metadata:
        operation: '{ OpMsg flags: 0, sections: [{ SectionSingle msg: {"find":"animals","filter":{"name":"Cow"},"limit":{"$numberInt":"1"},"singleBatch":true,"batchSize":{"$numberInt":"1"},"lsid":{"id":{"$binary":{"base64":"zOPs0UhFTzaDZlU+iad5xg==","subType":"04"}}},"$db":"keploy"} }], checksum: 0 }'
    requests:
        - header:
            length: 163
            requestId: 11
            responseTo: 0
            Opcode: 2013
          message:
            flagBits: 0
            sections:
                - '{ SectionSingle msg: {"find":"animals","filter":{"name":"Cow"},"limit":{"$numberInt":"1"},"singleBatch":true,"batchSize":{"$numberInt":"1"},"lsid":{"id":{"$binary":{"base64":"zOPs0UhFTzaDZlU+iad5xg==","subType":"04"}}},"$db":"keploy"} }'
            checksum: 0
          read_delay: 8924817543
    responses:
        - header:
            length: 166
            requestId: 17
            responseTo: 11
            Opcode: 2013
          message:
            flagBits: 0
            sections:
                - '{ SectionSingle msg: {"cursor":{"firstBatch":[{"_id":{"$oid":"65d9cd7b1052611b2d2aaf42"},"name":"Cow","sound":"Moo","__v":{"$numberInt":"0"}}],"id":{"$numberLong":"0"},"ns":"keploy.animals"},"ok":{"$numberDouble":"1.0"}} }'
            checksum: 0
          read_delay: 574025
    created: 1708773418
    reqTimestampMock: 2024-02-24T11:16:58.126078397Z
    resTimestampMock: 2024-02-24T11:16:58.127001556Z

Want to see if everything works as expected?

Run Tests

Time to put things to the test 🧪

sudo -E env PATH=$PATH keploy test -c 'bun run supabun.ts'

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

Final thoughts? Dive deeper! Try different API calls, tweak the DB response in the mocks.yml, or fiddle with the request or response in test-x.yml. Run the tests again and see the magic unfold!✨👩‍💻👨‍💻✨

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. 😊🚀

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

🛠️ Platform-Specific Requirements for Keploy​

Quick Installation Using CLI​

Other Installation Methods​

Downloading and running Keploy in Docker​

On macOS​

Downloading and running Keploy in Native using Debian on MacOS​

Downloading and running Keploy in Native​

On WSL/Linux AMD​

On WSL/Linux ARM​

Setting up the Docker Desktop for WSL 2​

With Arkade​

Get Started! 🎬​

Clone a sample user data CRUD app 🧪​

Installation Keploy​

Running App Locally on Linux/WSL 🐧​

📼 Roll the Tape - Recording Time!​

Generate testcases​

Run Tests​

Wrapping it up 🎉​

Contact Us​