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Constants

Assertion = Minitest::Assertion
 

Class Public methods

parallelize(workers: :number_of_processors, with: :processes, threshold: ActiveSupport.test_parallelization_threshold)

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.

If workers is set to :number_of_processors, the number of workers will be set to the actual core count on the machine you are on.

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 databases and will not work with system tests.

parallelize(workers: :number_of_processors, with: :threads)

The threaded parallelization uses minitest’s parallel executor directly. The processes parallelization uses a Ruby DRb server.

Because parallelization presents an overhead, it is only enabled when the number of tests to run is above the threshold param. The default value is 50, and it’s configurable via config.active_support.test_parallelization_threshold.

Source: show | on GitHub 

# File activesupport/lib/active_support/test_case.rb, line 81
def parallelize(workers: :number_of_processors, with: :processes, threshold: ActiveSupport.test_parallelization_threshold)
  workers = Concurrent.physical_processor_count if workers == :number_of_processors
  workers = ENV["PARALLEL_WORKERS"].to_i if ENV["PARALLEL_WORKERS"]

  return if workers <= 1

  Minitest.parallel_executor = ActiveSupport::Testing::ParallelizeExecutor.new(size: workers, with: with, threshold: threshold)
end

parallelize_setup(&block)

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

Source: show | on GitHub 

# File activesupport/lib/active_support/test_case.rb, line 103
def parallelize_setup(&block)
  ActiveSupport::Testing::Parallelization.after_fork_hook(&block)
end

parallelize_teardown(&block)

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

Source: show | on GitHub 

# File activesupport/lib/active_support/test_case.rb, line 120
def parallelize_teardown(&block)
  ActiveSupport::Testing::Parallelization.run_cleanup_hook(&block)
end

test_order()

Returns the order in which test cases are run.

ActiveSupport::TestCase.test_order # => :random

Possible values are :random, :parallel, :alpha, :sorted. Defaults to :random.

Source: show | on GitHub 

# File activesupport/lib/active_support/test_case.rb, line 44
def test_order
  ActiveSupport.test_order ||= :random
end

test_order=(new_order)

Sets the order in which test cases are run.

ActiveSupport::TestCase.test_order = :random # => :random

Valid values are:

  • :random (to run tests in random order)

  • :parallel (to run tests in parallel)

  • :sorted (to run tests alphabetically by method name)

  • :alpha (equivalent to :sorted)

Source: show | on GitHub 

# File activesupport/lib/active_support/test_case.rb, line 34
def test_order=(new_order)
  ActiveSupport.test_order = new_order
end

Instance Public methods

assert_no_match(matcher, obj, msg = nil)

Alias for: refute_match

Source: on GitHub 

# File activesupport/lib/active_support/test_case.rb, line 215

assert_not_empty(obj, msg = nil)

Alias for: refute_empty

Source: on GitHub 

# File activesupport/lib/active_support/test_case.rb, line 138

assert_not_equal(exp, act, msg = nil)

Alias for: refute_equal

Source: on GitHub 

# File activesupport/lib/active_support/test_case.rb, line 149

assert_not_in_delta(exp, act, delta = 0.001, msg = nil)

Alias for: refute_in_delta

Source: on GitHub 

# File activesupport/lib/active_support/test_case.rb, line 160

assert_not_in_epsilon(a, b, epsilon = 0.001, msg = nil)

Alias for: refute_in_epsilon

Source: on GitHub 

# File activesupport/lib/active_support/test_case.rb, line 171

assert_not_includes(collection, obj, msg = nil)

Alias for: refute_includes

Source: on GitHub 

# File activesupport/lib/active_support/test_case.rb, line 182

assert_not_instance_of(cls, obj, msg = nil)

Alias for: refute_instance_of

Source: on GitHub 

# File activesupport/lib/active_support/test_case.rb, line 193

assert_not_kind_of(cls, obj, msg = nil)

Alias for: refute_kind_of

Source: on GitHub 

# File activesupport/lib/active_support/test_case.rb, line 204

assert_not_nil(obj, msg = nil)

Alias for: refute_nil

Source: on GitHub 

# File activesupport/lib/active_support/test_case.rb, line 226

assert_not_operator(o1, op, o2 = UNDEFINED, msg = nil)

Alias for: refute_operator

Source: on GitHub 

# File activesupport/lib/active_support/test_case.rb, line 237

assert_not_predicate(o1, op, msg = nil)

Alias for: refute_predicate

Source: on GitHub 

# File activesupport/lib/active_support/test_case.rb, line 248

assert_not_respond_to(obj, meth, msg = nil)

Alias for: refute_respond_to

Source: on GitHub 

# File activesupport/lib/active_support/test_case.rb, line 259

assert_not_same(exp, act, msg = nil)

Alias for: refute_same

Source: on GitHub 

# File activesupport/lib/active_support/test_case.rb, line 270