Class: Minitest::Test

Relationships & Source Files
Namespace Children
Modules: `LifecycleHooks`
Extension / Inclusion / Inheritance Descendants
Subclasses: BenchSpec, Benchmark, Spec, 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

Constant Summary

PASSTHROUGH_EXCEPTIONS = Internal use only
# File 'lib/minitest/test.rb', line 19
```
[NoMemoryError, SignalException, SystemExit]
```
SETUP_METHODS = Internal use only
# File 'lib/minitest/test.rb', line 21
```
%w[ before_setup setup after_setup ]
```
TEARDOWN_METHODS = Internal use only
# File 'lib/minitest/test.rb', line 23
```
%w[ before_teardown teardown after_teardown ]
```

`Runnable` - Inherited

SIGNALS

Class Attribute Summary

.io_lock rw Internal use only

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 (inside the Test subclass or describe block) when you want to run your tests in parallel.
.runnable_methods

Returns all instance methods starting with “test_”.

`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`.
.test_order	Defines the order to run tests (:random by default).
.inherited, .new, .on_signal, .reset, .with_info_handler

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.
#metadata	Metadata you attach to the test results that get sent to the reporter.
#metadata=	Sets metadata, mainly used for Result.from.
#metadata?	Returns true if metadata exists.
#name	Name of the run.
#name=	Set the name of the run.
#passed?	Did this run pass?
#skipped?	Was this run skipped? See `#passed?` for more information.
#time	The time it took to run.

Instance Method Summary

#run

Runs a single test with setup/teardown hooks.
#capture_exceptions Internal use only

LifecycleHooks.
#class_name Internal use only
#neuter_exception(e) Internal use only
#new_exception(klass, msg, bt, kill = false) Internal use only
#sanitize_exception(e) Internal use only

`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.
#class_name

`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_pattern	For testing with pattern matching (only supported with Ruby 3.0 and later).
#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_pattern	For testing with pattern matching (only supported with Ruby 3.0 and later).
#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.
#_synchronize, #_where

`Runnable` - Inherited

#result_code	Returns a single character string to print based on the result of the run.
#run	Runs a single method.
#failure, #marshal_dump, #marshal_load, #time_it

Constructor Details

This class inherits a constructor from Minitest::Runnable

Class Attribute Details

.io_lock (rw)

This method is for internal use only.

[ GitHub ]

# File 'lib/minitest/test.rb', line 26


class << self; attr_accessor :io_lock; end

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 35


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 48


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 (inside the Test subclass or describe block) 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 60


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 70


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

  case self.test_order
  when :random, :parallel then
    srand Minitest.seed
    methods.sort.shuffle
  when :alpha, :sorted then
    methods.sort
  else
    raise "Unknown test_order: #{self.test_order.inspect}"
  end
end

Instance Method Details

#capture_exceptions

This method is for internal use only.

Test::LifecycleHooks

[ GitHub ]

# File 'lib/minitest/test.rb', line 189


def capture_exceptions # :nodoc:
  yield
rescue *PASSTHROUGH_EXCEPTIONS
  raise
rescue Assertion => e
  self.failures << e
rescue Exception => e
  self.failures << UnexpectedError.new(sanitize_exception e)
end

#class_name

This method is for internal use only.

[ GitHub ]

# File 'lib/minitest/test.rb', line 15


def class_name # :nodoc:
  self.class.name # for Minitest::Reportable
end

#neuter_exception(e)

This method is for internal use only.

[ GitHub ]

# File 'lib/minitest/test.rb', line 206


def neuter_exception e # :nodoc:
  bt = e.backtrace
  msg = e.message.dup

  new_exception e.class, msg, bt            # e.class can be a problem...
rescue
  msg.prepend "Neutered Exception #{e.class}: "

  new_exception RuntimeError, msg, bt, true # but if this raises, we die
end

#new_exception(klass, msg, bt, kill = false)

This method is for internal use only.

[ GitHub ]

# File 'lib/minitest/test.rb', line 217


def new_exception klass, msg, bt, kill = false # :nodoc:
  ne = klass.new msg
  ne.set_backtrace bt

  if kill then
    ne.instance_variables.each do |v|
      ne.remove_instance_variable v
    end
  end

  Marshal.dump ne                           # can raise TypeError
  ne
end

#run

Runs a single test with setup/teardown hooks.

[ GitHub ]

# File 'lib/minitest/test.rb', line 87


def run
  time_it do
    capture_exceptions do
      SETUP_METHODS.each do |hook|
        self.send hook
      end

      self.send self.name
    end

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

  Result.from self # per contract
end

#sanitize_exception(e)

This method is for internal use only.

[ GitHub ]

# File 'lib/minitest/test.rb', line 199


def sanitize_exception e # :nodoc:
  Marshal.dump e
  e                                         # good: use as-is
rescue
  neuter_exception e
end

Class: Minitest::Test

Overview

Constant Summary

Runnable - Inherited

Assertions - Included

Reportable - Included

Class Attribute Summary

Class Method Summary

Guard - Extended

Runnable - Inherited

Instance Attribute Summary

Reportable - Included

Assertions - Included

Runnable - Inherited

Instance Method Summary

Guard - Included

LifecycleHooks - Included

Reportable - Included

Assertions - Included

Runnable - Inherited

Constructor Details

Class Attribute Details

.io_lock (rw)

Class Method Details

.i_suck_and_my_tests_are_order_dependent!

.make_my_diffs_pretty!

.parallelize_me!

.runnable_methods

Instance Method Details

#capture_exceptions

#class_name

#neuter_exception(e)

#new_exception(klass, msg, bt, kill = false)

#run

#sanitize_exception(e)

`Runnable` - Inherited

`Assertions` - Included

`Reportable` - Included

`Guard` - Extended

`Runnable` - Inherited

`Reportable` - Included

`Assertions` - Included

`Runnable` - Inherited

`Guard` - Included

`LifecycleHooks` - Included

`Reportable` - Included

`Assertions` - Included

`Runnable` - Inherited