629 lines
24 KiB
Ruby
Executable File
629 lines
24 KiB
Ruby
Executable File
require 'erb'
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require 'yaml'
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require 'csv'
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module YAML #:nodoc:
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class Omap #:nodoc:
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def keys; map { |k, v| k } end
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def values; map { |k, v| v } end
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end
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end
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class FixtureClassNotFound < ActiveRecord::ActiveRecordError #:nodoc:
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end
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# Fixtures are a way of organizing data that you want to test against; in short, sample data. They come in 3 flavours:
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#
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# 1. YAML fixtures
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# 2. CSV fixtures
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# 3. Single-file fixtures
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#
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# = YAML fixtures
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#
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# This type of fixture is in YAML format and the preferred default. YAML is a file format which describes data structures
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# in a non-verbose, humanly-readable format. It ships with Ruby 1.8.1+.
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#
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# Unlike single-file fixtures, YAML fixtures are stored in a single file per model, which are placed in the directory appointed
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# by <tt>Test::Unit::TestCase.fixture_path=(path)</tt> (this is automatically configured for Rails, so you can just
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# put your files in <your-rails-app>/test/fixtures/). The fixture file ends with the .yml file extension (Rails example:
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# "<your-rails-app>/test/fixtures/web_sites.yml"). The format of a YAML fixture file looks like this:
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#
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# rubyonrails:
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# id: 1
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# name: Ruby on Rails
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# url: http://www.rubyonrails.org
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#
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# google:
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# id: 2
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# name: Google
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# url: http://www.google.com
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#
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# This YAML fixture file includes two fixtures. Each YAML fixture (ie. record) is given a name and is followed by an
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# indented list of key/value pairs in the "key: value" format. Records are separated by a blank line for your viewing
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# pleasure.
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#
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# Note that YAML fixtures are unordered. If you want ordered fixtures, use the omap YAML type. See http://yaml.org/type/omap.html
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# for the specification. You will need ordered fixtures when you have foreign key constraints on keys in the same table.
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# This is commonly needed for tree structures. Example:
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#
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# --- !omap
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# - parent:
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# id: 1
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# parent_id: NULL
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# title: Parent
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# - child:
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# id: 2
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# parent_id: 1
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# title: Child
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#
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# = CSV fixtures
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#
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# Fixtures can also be kept in the Comma Separated Value format. Akin to YAML fixtures, CSV fixtures are stored
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# in a single file, but instead end with the .csv file extension (Rails example: "<your-rails-app>/test/fixtures/web_sites.csv")
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#
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# The format of this type of fixture file is much more compact than the others, but also a little harder to read by us
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# humans. The first line of the CSV file is a comma-separated list of field names. The rest of the file is then comprised
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# of the actual data (1 per line). Here's an example:
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#
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# id, name, url
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# 1, Ruby On Rails, http://www.rubyonrails.org
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# 2, Google, http://www.google.com
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#
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# Should you have a piece of data with a comma character in it, you can place double quotes around that value. If you
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# need to use a double quote character, you must escape it with another double quote.
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#
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# Another unique attribute of the CSV fixture is that it has *no* fixture name like the other two formats. Instead, the
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# fixture names are automatically generated by deriving the class name of the fixture file and adding an incrementing
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# number to the end. In our example, the 1st fixture would be called "web_site_1" and the 2nd one would be called
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# "web_site_2".
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#
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# Most databases and spreadsheets support exporting to CSV format, so this is a great format for you to choose if you
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# have existing data somewhere already.
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#
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# = Single-file fixtures
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#
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# This type of fixtures was the original format for Active Record that has since been deprecated in favor of the YAML and CSV formats.
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# Fixtures for this format are created by placing text files in a sub-directory (with the name of the model) to the directory
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# appointed by <tt>Test::Unit::TestCase.fixture_path=(path)</tt> (this is automatically configured for Rails, so you can just
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# put your files in <your-rails-app>/test/fixtures/<your-model-name>/ -- like <your-rails-app>/test/fixtures/web_sites/ for the WebSite
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# model).
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#
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# Each text file placed in this directory represents a "record". Usually these types of fixtures are named without
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# extensions, but if you are on a Windows machine, you might consider adding .txt as the extension. Here's what the
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# above example might look like:
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#
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# web_sites/google
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# web_sites/yahoo.txt
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# web_sites/ruby-on-rails
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#
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# The file format of a standard fixture is simple. Each line is a property (or column in db speak) and has the syntax
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# of "name => value". Here's an example of the ruby-on-rails fixture above:
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#
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# id => 1
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# name => Ruby on Rails
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# url => http://www.rubyonrails.org
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#
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# = Using Fixtures
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#
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# Since fixtures are a testing construct, we use them in our unit and functional tests. There are two ways to use the
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# fixtures, but first let's take a look at a sample unit test found:
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#
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# require 'web_site'
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#
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# class WebSiteTest < Test::Unit::TestCase
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# def test_web_site_count
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# assert_equal 2, WebSite.count
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# end
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# end
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#
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# As it stands, unless we pre-load the web_site table in our database with two records, this test will fail. Here's the
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# easiest way to add fixtures to the database:
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#
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# ...
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# class WebSiteTest < Test::Unit::TestCase
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# fixtures :web_sites # add more by separating the symbols with commas
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# ...
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#
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# By adding a "fixtures" method to the test case and passing it a list of symbols (only one is shown here tho), we trigger
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# the testing environment to automatically load the appropriate fixtures into the database before each test.
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# To ensure consistent data, the environment deletes the fixtures before running the load.
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#
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# In addition to being available in the database, the fixtures are also loaded into a hash stored in an instance variable
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# of the test case. It is named after the symbol... so, in our example, there would be a hash available called
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# @web_sites. This is where the "fixture name" comes into play.
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#
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# On top of that, each record is automatically "found" (using Model.find(id)) and placed in the instance variable of its name.
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# So for the YAML fixtures, we'd get @rubyonrails and @google, which could be interrogated using regular Active Record semantics:
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#
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# # test if the object created from the fixture data has the same attributes as the data itself
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# def test_find
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# assert_equal @web_sites["rubyonrails"]["name"], @rubyonrails.name
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# end
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#
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# As seen above, the data hash created from the YAML fixtures would have @web_sites["rubyonrails"]["url"] return
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# "http://www.rubyonrails.org" and @web_sites["google"]["name"] would return "Google". The same fixtures, but loaded
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# from a CSV fixture file, would be accessible via @web_sites["web_site_1"]["name"] == "Ruby on Rails" and have the individual
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# fixtures available as instance variables @web_site_1 and @web_site_2.
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#
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# If you do not wish to use instantiated fixtures (usually for performance reasons) there are two options.
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#
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# - to completely disable instantiated fixtures:
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# self.use_instantiated_fixtures = false
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#
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# - to keep the fixture instance (@web_sites) available, but do not automatically 'find' each instance:
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# self.use_instantiated_fixtures = :no_instances
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#
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# Even if auto-instantiated fixtures are disabled, you can still access them
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# by name via special dynamic methods. Each method has the same name as the
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# model, and accepts the name of the fixture to instantiate:
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#
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# fixtures :web_sites
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#
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# def test_find
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# assert_equal "Ruby on Rails", web_sites(:rubyonrails).name
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# end
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#
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# = Dynamic fixtures with ERb
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#
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# Some times you don't care about the content of the fixtures as much as you care about the volume. In these cases, you can
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# mix ERb in with your YAML or CSV fixtures to create a bunch of fixtures for load testing, like:
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#
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# <% for i in 1..1000 %>
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# fix_<%= i %>:
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# id: <%= i %>
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# name: guy_<%= 1 %>
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# <% end %>
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#
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# This will create 1000 very simple YAML fixtures.
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#
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# Using ERb, you can also inject dynamic values into your fixtures with inserts like <%= Date.today.strftime("%Y-%m-%d") %>.
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# This is however a feature to be used with some caution. The point of fixtures are that they're stable units of predictable
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# sample data. If you feel that you need to inject dynamic values, then perhaps you should reexamine whether your application
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# is properly testable. Hence, dynamic values in fixtures are to be considered a code smell.
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#
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# = Transactional fixtures
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#
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# TestCases can use begin+rollback to isolate their changes to the database instead of having to delete+insert for every test case.
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# They can also turn off auto-instantiation of fixture data since the feature is costly and often unused.
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#
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# class FooTest < Test::Unit::TestCase
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# self.use_transactional_fixtures = true
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# self.use_instantiated_fixtures = false
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#
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# fixtures :foos
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#
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# def test_godzilla
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# assert !Foo.find(:all).empty?
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# Foo.destroy_all
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# assert Foo.find(:all).empty?
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# end
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#
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# def test_godzilla_aftermath
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# assert !Foo.find(:all).empty?
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# end
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# end
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#
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# If you preload your test database with all fixture data (probably in the Rakefile task) and use transactional fixtures,
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# then you may omit all fixtures declarations in your test cases since all the data's already there and every case rolls back its changes.
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#
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# In order to use instantiated fixtures with preloaded data, set +self.pre_loaded_fixtures+ to true. This will provide
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# access to fixture data for every table that has been loaded through fixtures (depending on the value of +use_instantiated_fixtures+)
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#
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# When *not* to use transactional fixtures:
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# 1. You're testing whether a transaction works correctly. Nested transactions don't commit until all parent transactions commit,
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# particularly, the fixtures transaction which is begun in setup and rolled back in teardown. Thus, you won't be able to verify
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# the results of your transaction until Active Record supports nested transactions or savepoints (in progress.)
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# 2. Your database does not support transactions. Every Active Record database supports transactions except MySQL MyISAM.
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# Use InnoDB, MaxDB, or NDB instead.
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class Fixtures < YAML::Omap
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DEFAULT_FILTER_RE = /\.ya?ml$/
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def self.instantiate_fixtures(object, table_name, fixtures, load_instances=true)
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object.instance_variable_set "@#{table_name.to_s.gsub('.','_')}", fixtures
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if load_instances
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ActiveRecord::Base.silence do
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fixtures.each do |name, fixture|
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begin
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object.instance_variable_set "@#{name}", fixture.find
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rescue FixtureClassNotFound
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nil
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end
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end
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end
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end
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end
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def self.instantiate_all_loaded_fixtures(object, load_instances=true)
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all_loaded_fixtures.each do |table_name, fixtures|
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Fixtures.instantiate_fixtures(object, table_name, fixtures, load_instances)
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end
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end
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cattr_accessor :all_loaded_fixtures
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self.all_loaded_fixtures = {}
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def self.create_fixtures(fixtures_directory, table_names, class_names = {})
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table_names = [table_names].flatten.map { |n| n.to_s }
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connection = block_given? ? yield : ActiveRecord::Base.connection
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ActiveRecord::Base.silence do
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fixtures_map = {}
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fixtures = table_names.map do |table_name|
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fixtures_map[table_name] = Fixtures.new(connection, File.split(table_name.to_s).last, class_names[table_name.to_sym], File.join(fixtures_directory, table_name.to_s))
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end
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all_loaded_fixtures.merge! fixtures_map
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connection.transaction(Thread.current['open_transactions'] == 0) do
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fixtures.reverse.each { |fixture| fixture.delete_existing_fixtures }
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fixtures.each { |fixture| fixture.insert_fixtures }
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# Cap primary key sequences to max(pk).
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if connection.respond_to?(:reset_pk_sequence!)
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table_names.each do |table_name|
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connection.reset_pk_sequence!(table_name)
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end
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end
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end
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return fixtures.size > 1 ? fixtures : fixtures.first
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end
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end
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attr_reader :table_name
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def initialize(connection, table_name, class_name, fixture_path, file_filter = DEFAULT_FILTER_RE)
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@connection, @table_name, @fixture_path, @file_filter = connection, table_name, fixture_path, file_filter
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@class_name = class_name ||
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(ActiveRecord::Base.pluralize_table_names ? @table_name.singularize.camelize : @table_name.camelize)
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@table_name = ActiveRecord::Base.table_name_prefix + @table_name + ActiveRecord::Base.table_name_suffix
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@table_name = class_name.table_name if class_name.respond_to?(:table_name)
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@connection = class_name.connection if class_name.respond_to?(:connection)
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read_fixture_files
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end
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def delete_existing_fixtures
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@connection.delete "DELETE FROM #{@table_name}", 'Fixture Delete'
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end
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def insert_fixtures
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values.each do |fixture|
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@connection.execute "INSERT INTO #{@table_name} (#{fixture.key_list}) VALUES (#{fixture.value_list})", 'Fixture Insert'
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end
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end
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private
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def read_fixture_files
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if File.file?(yaml_file_path)
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# YAML fixtures
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yaml_string = ""
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Dir["#{@fixture_path}/**/*.yml"].select {|f| test(?f,f) }.each do |subfixture_path|
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yaml_string << IO.read(subfixture_path)
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end
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yaml_string << IO.read(yaml_file_path)
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begin
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yaml = YAML::load(erb_render(yaml_string))
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rescue Exception=>boom
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raise Fixture::FormatError, "a YAML error occurred parsing #{yaml_file_path}. Please note that YAML must be consistently indented using spaces. Tabs are not allowed. Please have a look at http://www.yaml.org/faq.html\nThe exact error was:\n #{boom.class}: #{boom}"
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end
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if yaml
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# If the file is an ordered map, extract its children.
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yaml_value =
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if yaml.respond_to?(:type_id) && yaml.respond_to?(:value)
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yaml.value
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else
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[yaml]
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end
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yaml_value.each do |fixture|
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fixture.each do |name, data|
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unless data
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raise Fixture::FormatError, "Bad data for #{@class_name} fixture named #{name} (nil)"
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end
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self[name] = Fixture.new(data, @class_name)
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end
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end
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end
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elsif File.file?(csv_file_path)
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# CSV fixtures
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reader = CSV::Reader.create(erb_render(IO.read(csv_file_path)))
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header = reader.shift
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i = 0
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reader.each do |row|
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data = {}
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row.each_with_index { |cell, j| data[header[j].to_s.strip] = cell.to_s.strip }
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self["#{Inflector::underscore(@class_name)}_#{i+=1}"]= Fixture.new(data, @class_name)
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end
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elsif File.file?(deprecated_yaml_file_path)
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raise Fixture::FormatError, ".yml extension required: rename #{deprecated_yaml_file_path} to #{yaml_file_path}"
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else
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# Standard fixtures
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Dir.entries(@fixture_path).each do |file|
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path = File.join(@fixture_path, file)
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if File.file?(path) and file !~ @file_filter
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self[file] = Fixture.new(path, @class_name)
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end
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end
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end
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end
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def yaml_file_path
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"#{@fixture_path}.yml"
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end
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def deprecated_yaml_file_path
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"#{@fixture_path}.yaml"
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end
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def csv_file_path
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@fixture_path + ".csv"
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end
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def yaml_fixtures_key(path)
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File.basename(@fixture_path).split(".").first
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end
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def erb_render(fixture_content)
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ERB.new(fixture_content).result
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end
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end
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class Fixture #:nodoc:
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include Enumerable
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class FixtureError < StandardError#:nodoc:
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end
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class FormatError < FixtureError#:nodoc:
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end
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def initialize(fixture, class_name)
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case fixture
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when Hash, YAML::Omap
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@fixture = fixture
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when String
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@fixture = read_fixture_file(fixture)
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else
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raise ArgumentError, "Bad fixture argument #{fixture.inspect} during creation of #{class_name} fixture"
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end
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@class_name = class_name
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end
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def each
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@fixture.each { |item| yield item }
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end
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def [](key)
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@fixture[key]
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end
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def to_hash
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@fixture
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end
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def key_list
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columns = @fixture.keys.collect{ |column_name| ActiveRecord::Base.connection.quote_column_name(column_name) }
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columns.join(", ")
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end
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def value_list
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klass = @class_name.constantize rescue nil
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list = @fixture.inject([]) do |fixtures, (key, value)|
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col = klass.columns_hash[key] if klass.respond_to?(:ancestors) && klass.ancestors.include?(ActiveRecord::Base)
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fixtures << ActiveRecord::Base.connection.quote(value, col).gsub('[^\]\\n', "\n").gsub('[^\]\\r', "\r")
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end
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list * ', '
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end
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def find
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|
klass = @class_name.is_a?(Class) ? @class_name : Object.const_get(@class_name) rescue nil
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if klass
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|
klass.find(self[klass.primary_key])
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else
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raise FixtureClassNotFound, "The class #{@class_name.inspect} was not found."
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end
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end
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private
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def read_fixture_file(fixture_file_path)
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IO.readlines(fixture_file_path).inject({}) do |fixture, line|
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# Mercifully skip empty lines.
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next if line =~ /^\s*$/
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# Use the same regular expression for attributes as Active Record.
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unless md = /^\s*([a-zA-Z][-_\w]*)\s*=>\s*(.+)\s*$/.match(line)
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raise FormatError, "#{fixture_file_path}: fixture format error at '#{line}'. Expecting 'key => value'."
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end
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key, value = md.captures
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# Disallow duplicate keys to catch typos.
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raise FormatError, "#{fixture_file_path}: duplicate '#{key}' in fixture." if fixture[key]
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fixture[key] = value.strip
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fixture
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end
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end
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end
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module Test #:nodoc:
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module Unit #:nodoc:
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class TestCase #:nodoc:
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cattr_accessor :fixture_path
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|
class_inheritable_accessor :fixture_table_names
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class_inheritable_accessor :fixture_class_names
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class_inheritable_accessor :use_transactional_fixtures
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class_inheritable_accessor :use_instantiated_fixtures # true, false, or :no_instances
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class_inheritable_accessor :pre_loaded_fixtures
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self.fixture_table_names = []
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self.use_transactional_fixtures = false
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self.use_instantiated_fixtures = true
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self.pre_loaded_fixtures = false
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self.fixture_class_names = {}
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@@already_loaded_fixtures = {}
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self.fixture_class_names = {}
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def self.set_fixture_class(class_names = {})
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self.fixture_class_names = self.fixture_class_names.merge(class_names)
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end
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def self.fixtures(*table_names)
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table_names = table_names.flatten.map { |n| n.to_s }
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self.fixture_table_names |= table_names
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require_fixture_classes(table_names)
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setup_fixture_accessors(table_names)
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end
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def self.require_fixture_classes(table_names=nil)
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(table_names || fixture_table_names).each do |table_name|
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file_name = table_name.to_s
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file_name = file_name.singularize if ActiveRecord::Base.pluralize_table_names
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begin
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require_dependency file_name
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rescue LoadError
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# Let's hope the developer has included it himself
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end
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end
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end
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def self.setup_fixture_accessors(table_names=nil)
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(table_names || fixture_table_names).each do |table_name|
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table_name = table_name.to_s.tr('.','_')
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define_method(table_name) do |fixture, *optionals|
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force_reload = optionals.shift
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@fixture_cache[table_name] ||= Hash.new
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@fixture_cache[table_name][fixture] = nil if force_reload
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if @loaded_fixtures[table_name][fixture.to_s]
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@fixture_cache[table_name][fixture] ||= @loaded_fixtures[table_name][fixture.to_s].find
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else
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raise StandardError, "No fixture with name '#{fixture}' found for table '#{table_name}'"
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end
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end
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end
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end
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def self.uses_transaction(*methods)
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@uses_transaction = [] unless defined?(@uses_transaction)
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@uses_transaction.concat methods.map(&:to_s)
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end
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def self.uses_transaction?(method)
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@uses_transaction = [] unless defined?(@uses_transaction)
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@uses_transaction.include?(method.to_s)
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end
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def use_transactional_fixtures?
|
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use_transactional_fixtures &&
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!self.class.uses_transaction?(method_name)
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end
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|
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def setup_with_fixtures
|
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return unless defined?(ActiveRecord::Base) && !ActiveRecord::Base.configurations.blank?
|
|
|
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if pre_loaded_fixtures && !use_transactional_fixtures
|
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raise RuntimeError, 'pre_loaded_fixtures requires use_transactional_fixtures'
|
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end
|
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|
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@fixture_cache = Hash.new
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|
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# Load fixtures once and begin transaction.
|
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if use_transactional_fixtures?
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if @@already_loaded_fixtures[self.class]
|
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@loaded_fixtures = @@already_loaded_fixtures[self.class]
|
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else
|
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load_fixtures
|
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@@already_loaded_fixtures[self.class] = @loaded_fixtures
|
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end
|
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ActiveRecord::Base.send :increment_open_transactions
|
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ActiveRecord::Base.connection.begin_db_transaction
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|
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# Load fixtures for every test.
|
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else
|
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@@already_loaded_fixtures[self.class] = nil
|
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load_fixtures
|
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end
|
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|
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# Instantiate fixtures for every test if requested.
|
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instantiate_fixtures if use_instantiated_fixtures
|
|
end
|
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|
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alias_method :setup, :setup_with_fixtures
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|
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def teardown_with_fixtures
|
|
return unless defined?(ActiveRecord::Base) && !ActiveRecord::Base.configurations.blank?
|
|
|
|
# Rollback changes if a transaction is active.
|
|
if use_transactional_fixtures? && Thread.current['open_transactions'] != 0
|
|
ActiveRecord::Base.connection.rollback_db_transaction
|
|
Thread.current['open_transactions'] = 0
|
|
end
|
|
ActiveRecord::Base.verify_active_connections!
|
|
end
|
|
|
|
alias_method :teardown, :teardown_with_fixtures
|
|
|
|
def self.method_added(method)
|
|
case method.to_s
|
|
when 'setup'
|
|
unless method_defined?(:setup_without_fixtures)
|
|
alias_method :setup_without_fixtures, :setup
|
|
define_method(:setup) do
|
|
setup_with_fixtures
|
|
setup_without_fixtures
|
|
end
|
|
end
|
|
when 'teardown'
|
|
unless method_defined?(:teardown_without_fixtures)
|
|
alias_method :teardown_without_fixtures, :teardown
|
|
define_method(:teardown) do
|
|
teardown_without_fixtures
|
|
teardown_with_fixtures
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
private
|
|
def load_fixtures
|
|
@loaded_fixtures = {}
|
|
fixtures = Fixtures.create_fixtures(fixture_path, fixture_table_names, fixture_class_names)
|
|
unless fixtures.nil?
|
|
if fixtures.instance_of?(Fixtures)
|
|
@loaded_fixtures[fixtures.table_name] = fixtures
|
|
else
|
|
fixtures.each { |f| @loaded_fixtures[f.table_name] = f }
|
|
end
|
|
end
|
|
end
|
|
|
|
# for pre_loaded_fixtures, only require the classes once. huge speed improvement
|
|
@@required_fixture_classes = false
|
|
|
|
def instantiate_fixtures
|
|
if pre_loaded_fixtures
|
|
raise RuntimeError, 'Load fixtures before instantiating them.' if Fixtures.all_loaded_fixtures.empty?
|
|
unless @@required_fixture_classes
|
|
self.class.require_fixture_classes Fixtures.all_loaded_fixtures.keys
|
|
@@required_fixture_classes = true
|
|
end
|
|
Fixtures.instantiate_all_loaded_fixtures(self, load_instances?)
|
|
else
|
|
raise RuntimeError, 'Load fixtures before instantiating them.' if @loaded_fixtures.nil?
|
|
@loaded_fixtures.each do |table_name, fixtures|
|
|
Fixtures.instantiate_fixtures(self, table_name, fixtures, load_instances?)
|
|
end
|
|
end
|
|
end
|
|
|
|
def load_instances?
|
|
use_instantiated_fixtures != :no_instances
|
|
end
|
|
end
|
|
|
|
end
|
|
end
|