diff options
Diffstat (limited to 'activesupport/lib/active_support/test_case.rb')
| -rw-r--r-- | activesupport/lib/active_support/test_case.rb | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/test_case.rb b/activesupport/lib/active_support/test_case.rb index d1f7e6ea09..3588a5ac02 100644 --- a/activesupport/lib/active_support/test_case.rb +++ b/activesupport/lib/active_support/test_case.rb @@ -11,6 +11,7 @@ require "active_support/testing/isolation" require "active_support/testing/constant_lookup" require "active_support/testing/time_helpers" require "active_support/testing/file_fixtures" +require "active_support/testing/parallelization" module ActiveSupport class TestCase < ::Minitest::Test @@ -39,6 +40,91 @@ module ActiveSupport def test_order ActiveSupport.test_order ||= :random end + + # Parallelizes the test suite. + # + # Takes a `workers` argument that controls how many times the process + # is forked. For each process a new database will be created suffixed + # with the worker number. + # + # test-database-0 + # test-database-1 + # + # If `ENV["PARALLEL_WORKERS"]` is set the workers argument will be ignored + # and the environment variable will be used instead. This is useful for CI + # environments, or other environments where you may need more workers than + # you do for local testing. + # + # If the number of workers is set to `1` or fewer, the tests will not be + # parallelized. + # + # The default parallelization method is to fork processes. If you'd like to + # use threads instead you can pass `with: :threads` to the `parallelize` + # method. Note the threaded parallelization does not create multiple + # database and will not work with system tests at this time. + # + # parallelize(workers: 2, with: :threads) + # + # The threaded parallelization uses Minitest's parallel exector directly. + # The processes paralleliztion uses a Ruby Drb server. + def parallelize(workers: 2, with: :processes) + workers = ENV["PARALLEL_WORKERS"].to_i if ENV["PARALLEL_WORKERS"] + + return if workers <= 1 + + executor = case with + when :processes + Testing::Parallelization.new(workers) + when :threads + Minitest::Parallel::Executor.new(workers) + else + raise ArgumentError, "#{with} is not a supported parallelization exectutor." + end + + self.lock_threads = false if defined?(self.lock_threads) && with == :threads + + Minitest.parallel_executor = executor + + parallelize_me! + end + + # Set up hook for parallel testing. This can be used if you have multiple + # databases or any behavior that needs to be run after the process is forked + # but before the tests run. + # + # Note: this feature is not available with the threaded parallelization. + # + # In your +test_helper.rb+ add the following: + # + # class ActiveSupport::TestCase + # parallelize_setup do + # # create databases + # end + # end + def parallelize_setup(&block) + ActiveSupport::Testing::Parallelization.after_fork_hook do |worker| + yield worker + end + end + + # Clean up hook for parallel testing. This can be used to drop databases + # if your app uses multiple write/read databases or other clean up before + # the tests finish. This runs before the forked process is closed. + # + # Note: this feature is not available with the threaded parallelization. + # + # In your +test_helper.rb+ add the following: + # + # class ActiveSupport::TestCase + # parallelize_teardown do + # # drop databases + # end + # end + def parallelize_teardown(&block) + ActiveSupport::Testing::Parallelization.run_cleanup_hook do |worker| + yield worker + end + end end alias_method :method_name, :name |