BryanJBryce

José Valim — unit tests side-project video (transcript)

Source: https://x.com/josevalim/status/2108663976855052797 · auto-transcribed with Whisper, unedited

[0:00] Hey, everyone, so there has been many discussions on unit testing lately. And I think part of the discussion is that we likely understand different things about what unit testing is and what it is as a practice. So I thought I would record a video of a project that I'm working on and how I am writing tasks for it, okay? So this project, I'm working on it with the help of coding agents, right? I am not writing the code, but I am reviewing the code and I'm providing design directions. And in order to understand what the project does, so it is, you can write laws about Erlang and Elixir programs and you can prove them in me.

[0:49] So I'm going to give a little bit of context because that's going to be really helpful to understand the design of the project, okay? So imagine that like, so a RtypeSystem is coming to Elixir, right? So imagin

BryanJBryce

#!/bin/bash

# Script to copy production database to staging environment
set -e  # Exit on any error

if [ -z "$PROD_DATABASE_URL" ] || [ -z "$STAGING_DATABASE_URL" ]; then
    echo "Error: Database URLs not found in environment"
    echo "Make sure you have set up .envrc with PROD_DATABASE_URL and STAGING_DATABASE_URL"
    exit 1
fi

BryanJBryce

import Foundation
import Actor
import MessageRouter

public final class Core<State, Event, Command> {

    public typealias CommandProcessor = (Core<State, Event, Command>, Command) -> Void
    public typealias EventHandler = (State, Event) -> CoreUpdate<State, Command>

    public let stateChanged = MessageRouter<State>()

BryanJBryce

Keybase proof

I hereby claim:

• I am bryanjbryce on github.
• I am bryanbryce (https://keybase.io/bryanbryce) on keybase.
• I have a public key ASBAe_kEOjWTbAAAzJg_WlZOSqjv9tK8AsGfrE4un1rY2go

To claim this, I am signing this object:

BryanJBryce

Equipment

• MacOS Sierra 10.12.5
• MacBook Pro (Retina, 13-inch, Late 2012)
• nRF52-DK (PCA10040)

Toolchain Setup

1. Install GCC

BryanJBryce

public extension CustomDebugStringConvertible {
    var debugDescription: String {
        return debugDescription()
    }
    
    func debugDescription(indentationLevel: Int = 0) -> String {
        
        let indentString = (0..<indentationLevel).reduce("") { tabs, _ in tabs + "\t" }
        
        var s = "\(self.dynamicType)"

BryanJBryce

// This code accompanies a blog post: http://chris.eidhof.nl/posts/json-parsing-in-swift.html
//
// As of Beta5, the >>= operator is already defined, so I changed it to >>>=    


import Foundation

let parsedJSON : [String:AnyObject] = [
    "stat": "ok",
    "blogs": [