Concurrent Ruby code with blocking system calls can fail under Thread-based tests; using forked processes, pipes, and separate ActiveRecord connections keeps synchronization tests reliable.

rspec_spinner is a progress bar for RSpec which outputs failing examples as they happen (instead of all at the end).

Installation

gem install rspec_spinner

Usage

script/spec -r rspec_spinner -f RspecSpinner::Bar -c

To make a shortcut in your .bashrc

alias ss='script/spec -r rspec_spinner -f RspecSpinner::Bar -c'

There's also an alternate runner RSpecSpinner::Spinner which shows a spinner and the name of the current spec instead of a progress bar.

For arrays of objects, uniq does not work as expected, since it uses strict equality. So

[[1], [1]].uniq() == [[1], [1]]

In some cases, this might be a workaround:

[[1], [1]].invoke("toJSON").uniq().invoke("evalJSON")   
// == [[1]]

Install gem and plugin

sudo gem install parallel
script/plugin install git://github.com/grosser/parallel_tests.git

Adapt config/database.yml

test:
  database: xxx_test<%= ENV['TEST_ENV_NUMBER'] %>

Create test databases

script/dbconsole -p
CREATE DATABASE `xxx_test2`;
...

Generate RSpec files

script/generate rspec

(you'll probably only let it overwrite files in script/)

Prepare test databases...

Parsing XML and HTML with Nokogiri needs the right selector syntax; namespaces can make XPath queries miss nodes unless prefixes are used.

Rails localization with fast_gettext enables multi-language apps using .po files, _() and n_() for translated text and plural forms.

How it works

See the lemonade descriptions.

Unfortunately, the gem has a few problems:

• it does not work with Sass2
• it always generates all sprites when the sass file changes, which is too slow for big projects
• it expects a folder structure quite different to our usual

All these problems are solved for us, in our own lemonade fork. This fork has since been merged to the original gem, maybe we can use t...

A frozen or garbled shell often recovers with Ctrl-Q after accidental Ctrl-S, or with reset when terminal output settings are corrupted.

Haml markup can be migrated to ERB with haml2erb, but the conversion is only partly automated and still needs manual cleanup.

.notice,
.error,
.information,
.warning {
    font-weight: bold;
}

.notice {
    color: #11bb00;
}

.error {
    color: #F53A31;
}

.information {
    color: #557;
}

.warning {
    color: #d07d2d;
}

rake -T

This starts delayed_job, hiding all the output and hiding the process in the background.

rake jobs:work &>/dev/null &

sudo gem install zip
git clone git://github.com/rtomayko/date-performance.git
cd date-performance
rake package:build
cd dist
sudo gem install --no-ri --no-rdoc date-performance-0.4.7.gem

ActsAsSolr::Post.execute(Solr::Request::Delete.new(:query => "#{Location.solr_configuration[:type_field]}:#{ModelClass}"))
ActsAsSolr::Post.execute(Solr::Request::Commit.new)

Solr listens to different ports for different environments.

Start Solr (and hide useless output)

rake solr:start PORT=8981 &>/dev/null
rake solr:start PORT=8982 &>/dev/null

Stop Solr

rake solr:stop PORT=8981
rake solr:stop PORT=8982

Run one Cucumber feature file directly with script/cucumber, or invoke it through rake when speed is less important.

Speed up gem installs by skipping RI and RDoc generation with gem install --no-document; a global ~/.gemrc setting can disable local documentation support.

To call a class method (or static method) from an instance method:

class.method()

To call a class method from a class method:

method()

Development error from mixing non-reloading code with autoloaded classes, often after a stale class reference or cached instance keeps an unloaded constant alive.

sudo gem install rails --version="=1.2.3"
rails _1.2.3_ new-project-folder

sudo apt-get install unzip
rake rails:freeze:edge RELEASE=2.2.2

Display the active Git branch directly in the Bash prompt by customizing PS1, so the current repository state is visible while working in the shell.

Run one Test::Unit file, method, or name-matching subset directly from the command line when a full test suite is unnecessary.