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Notes on teaching both test/unit and RSpec to new Ruby developers

@tenderlove asked "Is it good to teach RSpec (vs t/u) to people who are totally new to Ruby?" I have experience suggesting that it is a good thing; after a short back and forth, it seemed useful to write it up in detail.

Background

This goes back several years, to when I was the primary Ruby/Rails trainer for Relevance from 2006-2009. I'm guessing that worked out to probably 6-8 classes a year during those years. Since then, RSpec has changed a fair amount (with the addition of expect) and test/unit has changed radically (it has an entirely new implementation, minitest, that avoids some of the inconsistencies that made test/unit a bit confusing during the time I'm writing about here).

I started out as an RSpec skeptic. I've never been afraid of what a lot of people denigrate as "magic" in Ruby libraries … to me, if you take the trouble to understand it, that stuff's just pr

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$ docker run -d -p 8181:80 -p 8125:8125/udp jayofdoom/trusty-graphite-standalone

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sudo docker ps -a | grep Exit | awk '{print $1}' | sudo xargs docker rm

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echo 'export PATH=$HOME/local/bin:$PATH' >> ~/.bashrc
. ~/.bashrc
mkdir ~/local
mkdir ~/node-latest-install
cd ~/node-latest-install
curl http://nodejs.org/dist/node-latest.tar.gz | tar xz --strip-components=1
./configure --prefix=~/local
make install # ok, fine, this step probably takes more than 30 seconds...
curl https://npmjs.org/install.sh | sh

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ert

(ert-deftest foo ()
  (assert nil))

Now: M-x ert RET foo RET

apropos

Emacs makes discovery easier.

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require 'json'
require 'date'

# Embedders

def scalar
  lambda { |x| x }
end

def date

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require 'rack/stream'

use Rack::Stream

run lambda {|env|
  stream = env['rack.stream']

  stream.after_open do
    times = 0
    open("./moi_munnar_up.jpg", "rb") {|f|

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Anil-Wadghules-MacBook-Pro:~ anil$ redis-server
[3933] 11 Jul 20:04:52.382 # Warning: no config file specified, using the default config. In order to specify a config file use redis-server /path/to/redis.conf
[3933] 11 Jul 20:04:52.384 * Max number of open files set to 10032
                _._
           _.-``__ ''-._
      _.-``    `.  `_.  ''-._           Redis 2.6.14 (00000000/0) 64 bit
  .-`` .-```.  ```\/    _.,_ ''-._
 (    '      ,       .-`  | `,    )     Running in stand alone mode
 |`-._`-...-` __...-.``-._|'` _.-'|     Port: 6379
 |    `-._   `._    /     _.-'    |     PID: 3933

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# Example from http://www.takadevelop.com/2013/05/03/adapter-pattern-in-ruby/
# Adapter Design Pattern

# Abstract Duck
class Duck
  def quack
  end

  def fly
  end

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