moxley

# IO#read should return a string with ASCII-8BIT encoding
# http://www.ruby-doc.org/core-2.1.1/IO.html#method-i-read
irb(main):001:0> RUBY_VERSION
=> "2.1.1"
irb(main):002:0> File.write('test', 'abcdefg')
=> 7
irb(main):003:0> File.read('test').encoding
=> #<Encoding:UTF-8>

moxley

# Always logs to passed-in logger
# Logs to $stderr when in console
class TeeLogger
  def initialize(ruby_logger)
    @logger = ruby_logger
  end

  private

  def logger

moxley

= simple_form_for [:admin, @basic_po], as: :purchase_order,
                  url: basic_po_admin_purchase_orders_path,
                  html: { class: 'form-horizontal' } do |f|

  .form_controls
    = f.input :vendor_id, label: 'Vendor Id', placeholder: '3231'
    = f.input :brand_title, as: :select, label: 'Brand',
      collection: UpcMaster.all_brand_titles
    = f.input :terms, as: :select, label: 'Terms',
      collection: Erp::PurchaseOrder::PO_TERMS.to_a

moxley

# spec:
    it "calls TrackShipment#track_delivery for the PurchaseReturnShipment" do
      track_shipment = instance_double('Ops::Returns::TrackShipment')
      expect(track_shipment).to receive(:foo)

      track_shipment_class = class_double('Ops::Returns::TrackShipment').as_stubbed_const
      expect(track_shipment_class).to receive(:new).with(prs).and_return(track_shipment)

      tracker.detect_events
    end

moxley

# Spec:
    it "calls TrackShipment#track_delivery for the PurchaseReturnShipment" do
      track_shipment_class = class_double('Ops::Returns::TrackShipment').as_stubbed_const
      expect(track_shipment_class).to receive(:foo).with(prs)

      tracker.detect_events
    end

# Code under test
class Ops::Returns::TrackBatchShipments

moxley

# Ruby VIPS Memory Test
# Instructions: `bundle exec ruby memory_test3.rb`

require 'vips'

def mem_usage
  `ps -o rss -p #{$$}`.strip.split.last.to_i
end

include VIPS

moxley

# Instructions: `bundle exec ruby memory_test2.rb`
# Variations:
# 1. `include CarrierWave::Vips` (default)
# 2. `include CarrierWave::MiniMagic` - first need to disable 'newrelic-carrierwave' gem

require 'carrierwave'
require 'carrierwave-vips'

# Memory test 2

moxley

# require 'spec_helper'

class InMemoryArel
  attr_accessor :collection

  def initialize(collection)
    self.collection = collection
  end

  def all

moxley

househappy_test=# create table my_nulls (id integer not null, first_name character varying(255) default 'foo', last_name character varying(255) default 'bar');
CREATE TABLE
househappy_test=# create sequence my_nulls_id_seq start with 1 increment by 1 no minvalue no maxvalue cache 1;
CREATE SEQUENCE
househappy_test=# alter table only my_nulls alter column id set default nextval('my_nulls_id_seq'::regclass);
ALTER TABLE
househappy_test=# insert into my_nulls (first_name) values (null);
INSERT 0 1
househappy_test=# select * from my_nulls where first_name is null;
 id | first_name | last_name

moxley

[1] website »  class MyNull < ActiveRecord::Base
            »  end
=> nil
[2] website »  my_null = MyNull.new
=> #<MyNull:0x007fc89cedd430> {
          :id => nil,
  :first_name => "foo",
   :last_name => "bar"
}
[3] website »  my_null.save!