Returns the order in which test cases are run.

ActiveSupport::TestCase.test_order # => :random

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

# File activesupport/lib/active_support/test_case.rb, line 38
def test_order
  ActiveSupport.test_order ||= :random
end

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)

# File activesupport/lib/active_support/test_case.rb, line 28
def test_order=(new_order)
  ActiveSupport.test_order = new_order
end

Assertion that the block should not raise an exception.

Passes if evaluated code in the yielded block raises no exception.

assert_nothing_raised do
  perform_service(param: 'no_exception')
end

# File activesupport/lib/active_support/test_case.rb, line 77
def assert_nothing_raised(*args)
  if args.present?
    ActiveSupport::Deprecation.warn(
      "Passing arguments to assert_nothing_raised "            "is deprecated and will be removed in Rails 5.1.")
  end
  yield
end