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RUN_BOOKSWAP_LOCALLY.md

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Running the BookSwap application locally

These instructions are required from Chapter04 onwards.

Dependencies

You will need the following tools to run your the code in this repository:

This project depends on a variety of testing tools, which are used for instruction and demonstration purposes:

Run locally

The BookSwap application can be run on its own in chapter04 and chapter05:

  1. Set the BOOKSWAP_PORT environment variable:
BOOKSWAP_PORT=XXXX
  1. Run the application:
$ go run chapterXX/cmd/main.go

From chapter06 onwards, you will require a database to run the BookSwap application:

  1. Install PostgresSQL according to the installation steps for your operating system.
  2. Export the following user variables:
BOOKSWAP_DB_URL=XXX
BOOKSWAP_PORT=XXX
BOOKSWAP_BASE_URL=XXX
  1. Run the BookSwap executable using the go run chapterXX/cmd/main.go command. The application will then listen on the configured port.

Run in Docker

From chapter06 onwards, you can run the BookSwap application with Docker:

  1. Install Docker according to the installation steps for your operating system. Separate Docker configuration files have been provided for each chapter. For example, docker-compose.book-swap.chapter06.yml runs the version of the application corresponding to the chapter06 directory.
  2. The supplied docker.env file contains the variables required for running the application. The default values can be seen below:
POSTGRES_USER=root
POSTGRES_PASSWORD=root
POSTGRES_DB=books
BOOKSWAP_DB_URL=postgres://root:root@db:5432/books?sslmode=disable
BOOKSWAP_PORT=3000
  1. Run the application using docker compose:
$  docker compose -f docker-compose.book-swap.chapterXX.yml up --build
$  docker compose -f docker-compose.book-swap.chapterXX.yml down
  1. The application will then listen on the configured port. You can easily test the application using curl.
curl --location --request GET 'http://localhost:3000/

Generate mocks

$ mockery --dir "chapterXX" --output "chapterXX/mocks" --all

Run unit tests

  1. Install all Dependencies and follow the Run locally steps.
  2. Run all tests:
$ go test ./... -v

Run all tests

WARNING: as tests often require a specific version of the test endpoint to be running, I do not recommend running all tests from the root directory.

Instead, I recommend running unit & integration tests per chapter:

  1. Run the Docker version of the chapterXX according to Run in Docker.
  2. In a separate window, change to the desired directory cd chapterXX.
  3. Run all tests in the chapterXX directory by setting to LONG commandline argument:
$ LONG=true go test ./... -v

Note: The command above will only work on CMD terminals. You can alternatively set the LONG=true environment variable in your terminal and then run the go test command on its own.

Postman collection

For your convenience, a Postman collection with requests for the BookSwap application has been provided. See BookSwap.postman_collection.json. This file can then be used to import the collection into Postman.