wacko

The problem

When writing a script that updates a large amount of data (typically a rake task), it's easy to end up with something like this:

A long, procedural script that works like a black box.

The problem is that testing this properly usually means running the script multiple times against different datasets and checking the final state of the database.

The tests tend to become long setup sections, small variations from one test to another (often involving subtle or unclear changes), and finally an assertion against the final database state using a query that doesn't tell us much about why something happened.

wacko

El problema

Muchas veces a la hora de programar un script que actualiza muchos datos (tipicamente una rake task), se suele obtener un resultado similar:

Un script largo, procedural, que funciona como una caja negra.

Y el problema es que, para testearlo bien, hay que correrlo muchas veces contra distintos conjuntos de datos, evaluando el estado final de la base de datos. Los tests suelen ser líneas y líneas de setup, pequeñas variaciones entre test y test (muchas veces cambios poco claros o evidentes) y finalmente una evaluación del estado final con una query con gusto a poco.

wacko

require 'date'

class ShortDate
  attr_reader :month, :day
  include Comparable

  def initialize(string)
    date = Date.strptime(string, '%m/%d')
    @month, @day = date.month, date.day
  rescue StandardError

wacko

En la página oficial de Ruby sugieren las siguientes opciones para instalar ruby:

• Windows: RubyInstaller

• Linux/Mac: rbenv o rvm (sugiero ir por rbenv)

wacko

# alias radio='function __radio(){ r=`grep -v "#" radios_nacionales.txt | grep -m 1 -i $1 | cut -d" " -f1`; cvlc $r 2> /dev/null; }; __radio'
# podria utilizarse mplayer en vez de vlc

AMs Nacionales

http://200.68.81.65:8000/am530                                              Radio Madre         530
http://www.servidorstreaming1.com:9962/;                                    Radio Colonia       550
http://195.154.182.222:25223/live.mp3                                       Radio Argentina     570
http://18683.live.streamtheworld.com/CONTINENTAL_SC                         Continental         590
http://38.107.243.197:9639/live                                             Rivadavia           630

wacko

#!/bin/bash

print_gems() {
  awk '/([[:alnum:]_]+) \(/{ print $1 }' Gemfile.lock | sort -u 
}

count() {
  grep -c ^
}

wacko

brew install 'nvm'
NODE_VERSION="4.4.3"

if ! grep -qs 'source $(brew --prefix nvm)/nvm.sh' ~/.bash_profile; then
  printf 'export PATH="$PATH:/usr/local/lib/node_modules"\n' >> ~/.bash_profile
  printf 'source $(brew --prefix nvm)/nvm.sh\n' >> ~/.bash_profile
fi

source $(brew --prefix nvm)/nvm.sh
nvm install "$NODE_VERSION"

wacko

require 'cuba'

class MyApp < Cuba

  define do
    on root do
      res.write "it works!"
    end
  end

wacko

# Use KeyValue to store globally unique data

KeyValue.set('api_key', '123')   # => true
KeyValue.get('api_key')          # => '123'

# You can use the alternate syntax:

KeyValue['api_key'] = '123'      # => true
KeyValue['api_key']              # => '123'

wacko

#!/usr/bin/env ruby

# Validates that you don't commit forbidden keywords to the repo
# You can skip this checking with 'git commit --no-verify'

exit 0 if ARGV.include?('--no-verify')
# Update this list with your own forbidden keywords
KEYWORDS = %w(binding.pry console.log debugger)

def red(text)    "\033[31m#{text}\033[0m"; end