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rails--rails/activerecord/RUNNING_UNIT_TESTS.rdoc
Sammy Larbi f5489f9ab4 Clarify ActiveRecord testing guidelines [ci skip]
1. Specify that you need to create the test databases, and that no special
   Rails command needs to be run to do that.
2. Although the underscore style of `rake test_mysql` works, make the
   documentation of running the tests in RUNNING_UNIT_TESTS.rdoc
   consistent with the "Contributing..." guide.
3. Promote "Testing Active Record" to not be a subsection of
   "Running a Single Test," since it doesn't make sense as a subsection
   of that.
2014-12-21 10:18:46 -06:00

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== Setup
If you don't have an environment for running tests, read
http://edgeguides.rubyonrails.org/contributing_to_ruby_on_rails.html#setting-up-a-development-environment
== Running the Tests
To run a specific test:
$ ruby -Itest test/cases/base_test.rb -n method_name
To run a set of tests:
$ ruby -Itest test/cases/base_test.rb
You can also run tests that depend upon a specific database backend. For
example:
$ bundle exec rake test_sqlite3
Simply executing <tt>bundle exec rake test</tt> is equivalent to the following:
$ bundle exec rake test:mysql
$ bundle exec rake test:mysql2
$ bundle exec rake test:postgresql
$ bundle exec rake test:sqlite3
$ bundle exec rake test:sqlite3_mem
There should be tests available for each database backend listed in the {Config
File}[rdoc-label:label-Config+File]. (the exact set of available tests is
defined in +Rakefile+)
== Config File
If +test/config.yml+ is present, then its parameters are obeyed; otherwise, the
parameters in +test/config.example.yml+ are.
You can override the +connections:+ parameter in either file using the +ARCONN+
(Active Record CONNection) environment variable:
$ ARCONN=postgresql ruby -Itest test/cases/base_test.rb
You can specify a custom location for the config file using the +ARCONFIG+
environment variable.