CrudGO

Basic CRUD API (https://en.wikipedia.org/wiki/Create,_read,_update_and_delete) in Golang with data stored in Mongo DB.

Installation

1. cd CrudGo 
2. go run main.go
3. Open Postman & test APIs
4. run testcases : go test -v OR goconvey

Note :
Fetching dependencies 
$ go get github.com/smartystreets/goconvey/convey gopkg.in/mgo.v2 github.com/gorilla/mux github.com/sirupsen/logrus

1. [Install Go ](https://golang.org/doc/install)
2. [Install Mongo](https://docs.mongodb.com/manual/installation/)
3. Install GoConvey (go get  "github.com/smartystreets/goconvey/convey")
4. Install Logrus (go get "github.com/sirupsen/logrus")

Schema

User

{ "users": 
    [{ "username": "jsmith", "displayName": "John Smith", "department": "Sales" }, 
    { "username": "jdoe", "displayName": "John Doe", "department": "Development" }] 
} 

API Lists

API 1 : Get All Users

• URL

  http://localhost:8888/users

• Method:

  GET

• URL Params

  None

• Data Params

  None

• Success Response:

  Returns all users present in the database

  • Code: 200
    Content:

       [
     
                  {
                      "username": "jsmith",
                      "displayName": "John Smith",
                      "department": "Sales"
                  },
                  {
                      "username": "sbhagat",
                      "displayName": "Sourabh Bhagat",
                      "department": "Development"
                  },
                  {
                      "username": "jdoe",
                      "displayName": "John Doe",
                      "department": "Sales"
                  }
        ]
    

• Error Response:

  This case occurs when mongo db is down.

  • Code: 400 StatusBadRequest
    Content: { user : [] }

• Notes:

API 2 : Insert a user

• URL

  http://localhost:8888/users

• Method:

  POST

• URL Params

  None

• Data Params

  displayName=[string]

  department=[string]

  Required:

  username=[string]

• Success Response:

  • Code: 200
    Content:

      {
          "status": 200,
          "message": "Inserted user into database"
      }
    

• Error Response:

  This case occurs when mongo db is down.

  • Code: 400 StatusBadRequest
    Content:

        Empty username
        {
                "status": 400,
                "message": "Invalid input : Please enter username"
        }
    
    OR User already found in the database
        {
                "status": 409,
                "message": "User already found in the database"
        }
    
     OR MongoDB is down
        {
                "status": 403,
                "message": Unable to insert user into database
        }
    

• Notes: make sure that database is created with name myDB

  API 3 : Get user by user name

• URL

  http://localhost:8888/users/{username}

• Method:

  GET

• URL Params

  username

• Data Params

  NONE
  

  Required:

  username=[string]

• Success Response:

  URL : http://localhost:8888/users/jdoe

  • Code: 200
    Content:

      {
          "displayName": "John Doe",
          "department": "Sales"
      }
    

• Error Response:

  This case occurs when mongo db is down.

  • Code: 404 StatusNotFound
    Content:

        If username doesnot exist in the database OR Mongo is down
       {
           "status": 404,
           "message": "User not found"
       }
    

• Notes: make sure that database is created with name myDB

API 4 : Delete user by username

• URL

  http://localhost:8888/users/{username}

• Method:

  DELETE

• URL Params

   username
  

• Data Params

  NONE
  

  Required:

  username=[string]

• Success Response:

  URL : http://localhost:8888/users/jdoe

  • Code: 200
    Content:

     {
         "status": 200,
         "message": "Deleted user from database"
     }
    

• Error Response:

  This case occurs when mongo db is down.

  • Code: 404 StatusNotFound
    Content:

        If username doesnot exist in the database OR Mongo is down
      {
          "status": 404,
          "message": "Unable to delete user from database"
      }
    

• Notes: make sure that database is created with name myDB

Running Test cases

sourabh:user sourabh$ go test -v
=== RUN   TestInsertNewUser

  Testing InsertNewUser function 
    Testing for incorrect input 
      Testing for empty username input 
        Error returned by InsertNewUser should not be nil ✔
    Testing for correct input 
      Testing for valid input (inserting test user) 
        Error returned by InsertNewUser should be nil ✔


2 total assertions

--- PASS: TestInsertNewUser (0.01s)
=== RUN   TestGetAllUsers

  Testing GetAllUsers function 
    Testing for valid input 
      Error returned by GetAllUsers should be nil ✔
      Length of users list returned by GetAllUsers should be not be nil ✔


4 total assertions

--- PASS: TestGetAllUsers (0.00s)
=== RUN   TestGetUserByName

  Testing GetUserByName function 
    Testing for invalid input 
      Testing for empty username 
        Error returned by GetUserByName should be nil ✔
    Testing for valid input 
      Error returned by GetUserByName should be nil ✔


6 total assertions

--- PASS: TestGetUserByName (0.00s)
=== RUN   TestDeleteUser

  Testing DeleteUser function 
    Document should be deleted after calling DeleteUser function ✔


7 total assertions

--- PASS: TestDeleteUser (0.02s)
PASS
ok      github.com/CrudGO/user  0.053s