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An exceptional tool for creating test data sets using ActiveRecord.
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= Dataset Dataset provides a simple API for creating and finding sets of data in your database. Check out Dataset::RecordMethods and Dataset::ModelFinders. Dataset loads data intelligently if you use 'nested contexts' in your tests (RSpec, anything that uses MiniTest::Unit::TestCase subclassing for creating nested contexts): describe Something do dataset :a => Dataset :a is loaded (at the right time) it 'should whatever' end describe More do dataset :b => Dataset :b is loaded. :a data is still there it 'should' end end describe Another do => Database is restored to :a, without re-running :a logic it 'should' end end end The goal is to see a marked improvement in overall test run speed, basing this on the assumption that it is faster to have the OS copy a file or mySQL dump and load. Of course, we may find this to be a false assumption, but there were plenty of bugs in the former 'Scenarios' - addressing that afforded the opportunity to test the assumption. Dataset does not prevent you from using other libraries like Machinist or factory_girl. If you were to used either of those, you could have a dataset like this: require 'faker' class OrganizationsDataset < Dataset::Base Sham.name { Faker::Name.name } Organization.blueprint do name { Sham.name } end def load name_model Organization.make, :org_one end end The benefit is that you can reuse interesting sets of data, without sacrificing the utility of those other libraries. describe Organization, 'stuff' do dataset :organizations end describe Organization, 'other stuff' do dataset :organizations end Get things installed, then read more in the Dataset documentation at http://aiwilliams.github.com/dataset == Installation Install the plugin: ./script/plugin install git://github.com/aiwilliams/dataset.git In your test_helper.rb/spec_helper.rb: require 'dataset' class MiniTest::Unit::TestCase include Dataset datasets_directory "#{Rails.root}/spec/datasets" end If you don't use rspec_on_rails, or you have specs that aren't of the RailsExampleGroup type, you should do this in spec_helper.rb: require 'dataset' class RSpec::Example::ExampleGroup include Dataset datasets_directory "#{Rails.root}/spec/datasets" end If you were a user of the Scenarios plugin, and want to do as little as possible to get going (assumes you are using rspec_on_rails): require 'dataset' Scenario = Scenarios = Dataset class MiniTest::Unit::TestCase include Dataset class << self alias_method :scenario, :dataset end end class ScenariosResolver < Dataset::DirectoryResolver def suffix @suffix ||= 'Scenario' end end Dataset::Resolver.default = ScenariosResolver.new("#{Rails.root}/spec/scenarios") == Credits Written by [Adam Williams](http://github.com/aiwilliams). Contributors: - [Saturn Flyer](http://www.saturnflyer.com) [github](http://github.com/saturnflyer) - [Steve Iannopollo](http://github.com/siannopollo) - [John Long](http://github.com/jlong) --- Dataset is released under the MIT-License and is Copyright (c)2008 Adam Williams.
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