pg-mem VS hardhat-gas-reporter

I've used pgmem https://github.com/oguimbal/pg-mem for the last couple of years for the same thing.

I was wondering the other day how to classify tests that use a test double like pg-mem, which isn't a mock but isn't the Dockerized test DB either :

https://github.com/oguimbal/pg-mem

In my case, I use TypeORM with PostgreSQL, and there's pg-mem to run an instance in memory, it supports most of the common functionality of PostgreSQL but you will need to do some adjustment to your code to be within the limits.

Postgres in the browser is possible through pg-mem: "pg-mem is an experimental in-memory emulation of a postgres database" but it also suffers from no persistence. If you can persist to a file somewhere then read it in on startup (and if your local data isn't huge) this might work.

Dont get me wrong: I am trying to contribute to opensource as well, so I get that supporting small projects can be demanding. There's nothing wrong in not spending your weekends on OS. But not asking for help, nor specifying that a project is unmaintained, nor even answering issues & pull requests for years feels just wrong.

A pure Javascript in memory emulation of Posgres, to help writing better node tests https://github.com/oguimbal/pg-mem

Okay, I had a bit of spare time,I've implemented that, and it is now available with [email protected]

To get a glimpse of what I'm talking about, you can clone this repo and follow "Development" instructions (by the way this is a small OS lib I maintain, I wrote about it here)

With hardhat-gas-reporter we can see how much expensive each implementation is.

Deploying the contract in Polygon and minting costed around $0.80, including some NFTs minting. Compared to Ethereum mainnet, it would have been some thousand bucks. Despite that it is also a good idea to optimize the contract, and check the gas costs. Here's a great tool if you're using Hardhat.

I can get a neat report with hardhat-gas-reporter for my own contracts, but I don't know how to do that for third-parties if they don't happen to be using Hardhat too - or if they have no test suites at all.