“Testing Postgres Integration in Golang? Learn about Integration Testing with Go”

Integration tests in Golang are like a recipe for confidence in my Postgres implementation. I use raw SQL queries to keep it simple, and spin up an in-memory database within my Go app for easy testing. I’ve got complete coverage and flexibility to switch to another database provider if needed. It’s like having my cake and eating it too! 🍰 #IntegrationTesting #Golang🐹

Overview 📊

In this project, I have started introducing integration tests in order to ensure the confidence in my Postgres implementations. I am using the repository pattern to interface my entities and domains separately, with a Postgres implementation of the engineer or profile repository that contains various methods such as Add profile, get profile for user, and get all.

Raw SQL Queries 📝

The use of raw SQL queries is quite common in Go, and while these queries are quite simple, they provide the flexibility I need without the need for an RM or the use of a package such as SQL C. I wanted to be able to run Postgres tests within my Go application itself, without the need for Docker or running a test database externally.

Repository Testing 🧪

The repo test package contains a method that runs generic tests on a repository interface, taking in a function which returns an implementation of the reader writer repository interface. These tests cover scenarios such as no data, minimal data, and maximal data to ensure that the repository functions as expected.

Postgres Integration 📦

Under the hood, the Postgres test package uses the embedded Postgres package to spin up Postgres containers within Go programs, enabling integration testing with an in-memory test database. By using this approach, I can run full integration tests with complete coverage over any repository methods.

Flexibility with other Database Providers 🛠️

The repo test package allows for easy switching to other database providers if needed, ensuring that the tests can run for any repo implementation. Additionally, if Postgres is not an option, the test containers package in Go provides a solution for spinning up containers for other database providers.

Conclusion 🚀

In conclusion, this is how I set up my Postgres integration tests, providing a flexible and comprehensive approach to ensuring the reliability of my repository methods. I hope this helps, and stay tuned for more content and improvements on the channel. See you later!