This is a simple url shortener written in Golang and MySQL

1. Golang How to install Golang
2. Docker How to install Docker?

Run the following commands to setup the project

git clone https://github.com/keploy/samples-go.git && cd samples-go/mux-mysql
go mod download

curl -O https://raw.githubusercontent.com/keploy/keploy/main/keploy.sh && source keploy.sh 

1. Spin up the mysql docker container

   docker run -p 3306:3306 --rm --name mysql -e MYSQL_ROOT_PASSWORD=my-secret-pw -d mysql:latest

2. The MySQL Database takes some time to be ready after spinning up the container, you can wait a minute or just run the following command to monitor the logs

   watch -n 1 docker logs mysql

3. Once we get the following message in the logs we are ready to start our golang server

    2024-01-19 13:53:43+00:00 [Note] [Entrypoint]: Stopping temporary server
    2024-01-19T13:53:43.854798Z 10 [System] [MY-013172] [Server] Received SHUTDOWN from user root. Shutting down mysqld (Version: 8.2.0).
    2024-01-19T13:54:00.148602Z 0 [System] [MY-010910] [Server] /usr/sbin/mysqld: Shutdown complete (mysqld 8.2.0)  MySQL Community Server - GPL.

4. Run the following command to build the executable out of our golang code

   export ConnectionString="root:my-secret-pw@tcp(localhost:3306)/mysql"
   
   go build -o main -cover

   If you get some error like this after running ./main,

   [mysql] 2024/01/19 21:28:04 packets.go:37: unexpected EOF
   [mysql] 2024/01/19 21:28:04 packets.go:37: unexpected EOF
   [mysql] 2024/01/19 21:28:04 packets.go:37: unexpected EOF
   2024/01/19 21:28:04 Couldnt create store driver: bad connection

   This means that the mysql db is not ready yet, watch out for logs in Step 2 and wait for 20-30s

5. To capture test cases for our application use the following command

    keploy record -c "./main"

   

6. To generate test cases, we can simply use cURL or Postman.

   curl -X POST localhost:8080/create \ 
   -d '{"link":"https://google.com"}'

   This should return the following output

   {
       "message":"Converted",
       "link":"http://localhost:8080/link/1",
       "status":true
   }
   

7. To get all the links, run

   curl localhost:8080/all

8. To get redirected to the real url, just use the shortened link in browser or run

   curl localhost:8080/links/1

9. All these test cases are captured by Keploy

1. Just one simple command, run

    keploy test -c "./main" --goCoverage

3. Done..

1. Spin up the mysql docker container

    docker run -p 3306:3306 --rm --name mysql --network keploy-network -e MYSQL_ROOT_PASSWORD=my-secret-pw -d mysql:latest

2. The MySQL Database takes some time to be ready after spinning up the container, you can wait a minute or just run the following command to monitor the logs

    watch -n 1 docker logs mysql

3. Once we get the following message in the logs we are ready to start our golang server

   2024-01-19 13:53:43+00:00 [Note] [Entrypoint]: Stopping temporary server
   2024-01-19T13:53:43.854798Z 10 [System] [MY-013172] [Server] Received SHUTDOWN from user root. Shutting down mysqld (Version: 8.2.0).
   2024-01-19T13:54:00.148602Z 0 [System] [MY-010910] [Server] /usr/sbin/mysqld: Shutdown complete (mysqld 8.2.0)  MySQL Community Server - GPL.

4. Build the docker image of the application

    docker build -t url-short .

5. To start the server with keploy, run

   keploy record -c "docker run -p 8080:8080 --name urlshort --rm --network keploy-network url-short:latest"

   There you go, keploy has started capturing incomming requests

   

6. Make some API Requests: -

   curl -X POST localhost:8080/create \ 
   -d '{"link":"https://google.com"}'

   This should return the following output

   {
       "message":"Converted",
       "link":"http://localhost:8080/link/1",
       "status":true
   }
   

   To get all the links, run

   curl localhost:8080/all

   

7. To run the tests, run

   keploy test -c "docker run -p 8080:8080 --name urlshort --rm --network keploy-network url-short:latest"