Class: Minitest::Test

Relationships & Source Files
Namespace Children
Modules: LifecycleHooks
Extension / Inclusion / Inheritance Descendants
Subclasses: BenchSpec, Benchmark, Spec, Minitest::Unit::TestCase
Super Chains via Extension / Inclusion / Inheritance
Class Chain: self, Guard, Runnable
Instance Chain: self, Guard, LifecycleHooks, Reportable, Assertions, Runnable
Inherits:	Minitest::Runnable ::Object Minitest::Runnable Minitest::Test
Defined in:	lib/minitest/test.rb, lib/minitest/hell.rb

Overview

Subclass Test to create your own tests. Typically you'll want a Test subclass per implementation class.

See Assertions

Class Method Summary

.i_suck_and_my_tests_are_order_dependent!

Call this at the top of your tests when you absolutely positively need to have ordered tests.
.make_my_diffs_pretty!

Make diffs for this Test use #pretty_inspect so that diff in assert_equal can have more details.
.parallelize_me!

Call this at the top of your tests when you want to run your tests in parallel.
.runnable_methods

Returns all instance methods starting with “test_”.
.test_order

Defines the order to run tests (:random by default).

Guard - Extended

jruby?	Is this running on jruby?
maglev?	Is this running on maglev?
mri?	Is this running on mri?
osx?	Is this running on macOS?
rubinius?	Is this running on rubinius?
windows?	Is this running on windows?

Runnable - Inherited

.methods_matching	Returns all instance methods matching the pattern `re`.
.run	Responsible for running all runnable methods in a given class, each in its own instance.
.run_one_method	Runs a single method and has the reporter record the result.
.runnable_methods	Each subclass of Runnable is responsible for overriding this method to return all runnable methods.
.runnables	Returns all subclasses of Runnable.

Instance Attribute Summary

Reportable - Included

#error?	Did this run error?
#passed?	Did this run pass?
#skipped?	Was this run skipped?

Assertions - Included

#skipped?

Was this testcase skipped? Meant for #teardown.

Runnable - Inherited

#assertions	Number of assertions executed in this run.
#failures	An assertion raised during the run, if any.
#name	Name of the run.
#name=	Set the name of the run.
#time	The time it took to run.
#passed?	Did this run pass?
#skipped?	Was this run skipped? See `#passed?` for more information.

Instance Method Summary

#run

Runs a single test with setup/teardown hooks.

Guard - Included

#jruby?	Is this running on jruby?
#maglev?	Is this running on maglev?
#mri?	Is this running on mri?
#osx?	Is this running on macOS?
#rubinius?	Is this running on rubinius?
#windows?	Is this running on windows?

LifecycleHooks - Included

#after_setup	Runs before every test, after setup.
#after_teardown	Runs after every test, after teardown.
#before_setup	Runs before every test, before setup.
#before_teardown	Runs after every test, before teardown.
#setup	Runs before every test.
#teardown	Runs after every test.

Reportable - Included

#location	The location identifier of this test.
#result_code	Returns “.”, “F”, or “E” based on the result of the run.

Assertions - Included

#assert	Fails unless `test` is truthy.
#assert_empty	Fails unless `obj` is empty.
#assert_equal	Fails unless `exp == act` printing the difference between the two, if possible.
#assert_in_delta	For comparing Floats.
#assert_in_epsilon	For comparing Floats.
#assert_includes	Fails unless `collection` includes `obj`.
#assert_instance_of	Fails unless `obj` is an instance of `cls`.
#assert_kind_of	Fails unless `obj` is a kind of `cls`.
#assert_match	Fails unless `matcher` `=~` `obj`.
#assert_mock	Assert that the mock verifies correctly.
#assert_nil	Fails unless `obj` is nil.
#assert_operator	For testing with binary operators.
#assert_output	Fails if stdout or stderr do not output the expected results.
#assert_path_exists	Fails unless `path` exists.
#assert_predicate	For testing with predicates.
#assert_raises	Fails unless the block raises one of `exp`.
#assert_respond_to	Fails unless `obj` responds to `meth`.
#assert_same	Fails unless `exp` and `act` are `#equal?`
#assert_send	`send_ary` is a receiver, message and arguments.
#assert_silent	Fails if the block outputs anything to stderr or stdout.
#assert_throws	Fails unless the block throws `sym`
#capture_io	Captures $stdout and $stderr into strings:
#capture_subprocess_io	Captures $stdout and $stderr into strings, using Tempfile to ensure that subprocess IO is captured as well.
#diff	Returns a diff between `exp` and `act`.
#exception_details	Returns details for exception `e`
#fail_after	Fails after a given date (in the local time zone).
#flunk	Fails with `msg`.
#message	Returns a proc that will output `msg` along with the default message.
#mu_pp	This returns a human-readable version of `obj`.
#mu_pp_for_diff	This returns a diff-able more human-readable version of `obj`.
#pass	used for counting assertions.
#refute	Fails if `test` is truthy.
#refute_empty	Fails if `obj` is empty.
#refute_equal	Fails if `exp == act`.
#refute_in_delta	For comparing Floats.
#refute_in_epsilon	For comparing Floats.
#refute_includes	Fails if `collection` includes `obj`.
#refute_instance_of	Fails if `obj` is an instance of `cls`.
#refute_kind_of	Fails if `obj` is a kind of `cls`.
#refute_match	Fails if `matcher` `=~` `obj`.
#refute_nil	Fails if `obj` is nil.
#refute_operator	Fails if `o1` is not `op` `o2`.
#refute_path_exists	Fails if `path` exists.
#refute_predicate	For testing with predicates.
#refute_respond_to	Fails if `obj` responds to the message `meth`.
#refute_same	Fails if `exp` is the same (by object identity) as `act`.
#skip	Skips the current run.
#skip_until	Skips the current run until a given date (in the local time zone).
#things_to_diff	Returns things to diff [expect, butwas], or [nil, nil] if nothing to diff.

Runnable - Inherited

#result_code	Returns a single character string to print based on the result of the run.
#run	Runs a single method.

Class Method Details

.i_suck_and_my_tests_are_order_dependent!

Call this at the top of your tests when you absolutely positively need to have ordered tests. In doing so, you're admitting that you suck and your tests are weak.

[ GitHub ]

# File 'lib/minitest/test.rb', line 31


def self.i_suck_and_my_tests_are_order_dependent!
  class << self
    undef_method :test_order if method_defined? :test_order
    define_method :test_order do :alpha end
  end
end

.make_my_diffs_pretty!

Make diffs for this Test use #pretty_inspect so that diff in assert_equal can have more details. NOTE: this is much slower than the regular inspect but much more usable for complex objects.

[ GitHub ]

# File 'lib/minitest/test.rb', line 44


def self.make_my_diffs_pretty!
  require "pp"

  define_method :mu_pp, &:pretty_inspect
end

.parallelize_me!

Call this at the top of your tests when you want to run your tests in parallel. In doing so, you're admitting that you rule and your tests are awesome.

[ GitHub ]

# File 'lib/minitest/test.rb', line 55


def self.parallelize_me!
  include Minitest::Parallel::Test
  extend Minitest::Parallel::Test::ClassMethods
end

.runnable_methods

Returns all instance methods starting with “test_”. Based on #test_order, the methods are either sorted, randomized (default), or run in parallel.

[ GitHub ]

# File 'lib/minitest/test.rb', line 65


def self.runnable_methods
  methods = methods_matching(/^test_/)

  case self.test_order
  when :random, :parallel then
    max = methods.size
    methods.sort.sort_by { rand max }
  when :alpha, :sorted then
    methods.sort
  else
    raise "Unknown test_order: #{self.test_order.inspect}"
  end
end

.test_order

Defines the order to run tests (:random by default). Override this or use a convenience method to change it for your tests.

[ GitHub ]

# File 'lib/minitest/test.rb', line 83


def self.test_order
  :random
end

Instance Method Details

#run

Runs a single test with setup/teardown hooks.

[ GitHub ]

# File 'lib/minitest/test.rb', line 92


def run
  with_info_handler do
    time_it do
      capture_exceptions do
        before_setup; setup; after_setup

        self.send self.name
      end

      TEARDOWN_METHODS.each do |hook|
        capture_exceptions do
          self.send hook
        end
      end
    end
  end

  Result.from self # per contract
end