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This reverts commit 8d2866bb80fbe81acb04f5b0c44f152f571fb29f.
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This hack prevails everywhere in the codebase by being copy & pasted, and it's actually not a negative thing but a necessary thing for framework implementors,
so it should better have a name and be a thing.
And with this commit, activesupport/test/abstract_unit.rb now doesn't silently autoload AS::TestCase,
so we're ready to establish clearner environment for running AS tests (probably in later commits)
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Set process title of parallelized test workers
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We sometimes say "✂️ newline after `private`" in a code review (e.g.
https://github.com/rails/rails/pull/18546#discussion_r23188776,
https://github.com/rails/rails/pull/34832#discussion_r244847195).
Now `Layout/EmptyLinesAroundAccessModifier` cop have new enforced style
`EnforcedStyle: only_before` (https://github.com/rubocop-hq/rubocop/pull/7059).
That cop and enforced style will reduce the our code review cost.
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Previously, if a test worker exited early, the in-flight test it was
supposed to run wasn't reported as a failure.
If all workers exited immediately, this would be reported as ex.
Finished in 1.708349s, 39.2192 runs/s, 79.0237 assertions/s.
67 runs, 135 assertions, 0 failures, 0 errors, 2 skips
This commit validates that all workers finish running tests by ensuring
that the queue is empty after they exit. This works because we signal
the workers to exit by pushing nil onto the queue, so that there should
be a number of items left in the queue matching potentially missed
tests.
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Resolves https://github.com/rails/rails/issues/35835
If an exception occurs during `parallelize_setup` make sure to catch that exception and apply it to the result of each successive test run. This results in marking all of the tests as failed to bring attention to the issue & ensure it is addressed before proceeding.
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Currently we sometimes find a redundant begin block in code review
(e.g. https://github.com/rails/rails/pull/33604#discussion_r209784205).
I'd like to enable `Style/RedundantBegin` cop to avoid that, since
rescue/else/ensure are allowed inside do/end blocks in Ruby 2.5
(https://bugs.ruby-lang.org/issues/12906), so we'd probably meets with
that situation than before.
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since Ruby 2.5
https://bugs.ruby-lang.org/issues/14133
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Generally followed the pattern for https://github.com/rails/rails/pull/32034
* Removes needless CI configs for 2.4
* Targets 2.5 in rubocop
* Updates existing CHANGELOG entries for fewer merge conflicts
* Removes Hash#slice extension as that's inlined on Ruby 2.5.
* Removes the need for send on define_method in MethodCallAssertions.
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This prevents the array from being dumped as a DRbObject so we can reduce
communication with the server.
In DRb, if `Marshal.dump` fails, `Marshal.dump` is executed again after
converting the object to `DRbObject`. This also possible to reduce the
execution of `Marshal.dump` by converting to a format that can be
marshalized in advance using `DRbObject`.
This is the same approach to Action Pack's parallel test. Ref: 5751b7ea58d7cf259dda30fb42fff51fc6ae93d5
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Windows support for parallelization and instrumenter
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Add Windows support for `ActiveSupport::Testing::Parallelization`
and `ActiveSupport::Notifications::Instrumenter`.
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DRb wraps in `DRbUnknown` if the data contains a type that can not be
resolved locally. This can happen if an error occurs in the test and the
error class can not be resolved on the server side.
When this happens, an instance of `DRbUnknown` is passed to the `result`
of `Server#record`. This causes another error(undefined method assertions
for #<DRb::DRbUnknown:> (NoMethodError)) in `reporter.record`.
This can confirm by the following steps.
```
$ rails new app -B --dev; cd app
$ rails g scaffold user name:string
$ edit `config.action_controller.allow_forgery_protection = true` in environments/test.rb
$ bin/rails t
```
In the case of `DRbUnknown` occurs, can't resolve error exception. So wrap
exception with `DRbRemoteError` in the same way as an unmarshalled object.
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Fix DRb::DRbServerNotFound errors in parallel tests
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marshallable DRbRemoteError
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There are two main reasons why `assert_called_with` should require
`args` argument:
1) If we want to assert that some method should be called and we don't
need to check with which arguments it should be called then we should use
`assert_called`.
2) `assert_called_with` without `args` argument doesn't assert anything!
```ruby
assert_called_with(@object, :increment) do
@object.decrement
end
```
It causes false assertions in tests that could cause regressions in the project.
I found this bug by working on
[minitest-mock_expectations](https://github.com/bogdanvlviv/minitest-mock_expectations) gem.
This gem is an extension for minitest that provides almost the same method call
assertions.
I was wondering whether you would consider adding "minitest-mock_expectations"
to `rails/rails` instead of private `ActiveSupport::Testing::MethodCallAssertions` module.
If yes, I'll send a patch - https://github.com/bogdanvlviv/rails/commit/a970ecc42c3a9637947599f2c13e3762e4b59208
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Followup to a recently merged PR, too minor and detailed to require a
modification to the contributed patch.
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This commit moves the `run_cleanup` hook into an `ensure` block so we
make sure to cleanup the databases even if an exception is raised while
running the parallel tests.
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Six Mocha calls prove quite resistant to Minitestification. For example,
if we replace
```
ActiveRecord::Associations::HasManyAssociation
.any_instance
.expects(:reader)
.never
```
with `assert_not_called`, Minitest wisely raises
```
NameError: undefined method `reader' for class `ActiveRecord::Associations::HasManyAssociation'
```
as `:reader` comes from a deeply embedded abstract class,
`ActiveRecord::Associations::CollectionAssociation`.
This patch tackles this difficulty by adding
`ActiveSupport::Testing::MethodCallAsserts#assert_called_on_instance_of`
which injects a stubbed method into `klass`, and verifies the number of
times it is called, similar to `assert_called`. It also adds a convenience
method, `assert_not_called_on_instance_of`, mirroring
`assert_not_called`.
It uses the new method_call_assertions to replace the remaining Mocha
calls in `ActiveRecord` tests.
[utilum + bogdanvlviv + kspath]
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Ruby 2.4 has native `Regexp#match?`.
https://ruby-doc.org/core-2.4.0/Regexp.html#method-i-match-3F
Related #32034.
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Use attr_reader/attr_writer instead of methods
method is 12% slower
Use flat_map over map.flatten(1)
flatten is 66% slower
Use hash[]= instead of hash.merge! with single arguments
merge! is 166% slower
See https://github.com/rails/rails/pull/32337 for more conversation
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When `to:` is passed to `assert_changes`, it now prints the well-known `"Expected: x\n Actual: y"` message.
Before, the message only contained the actual value.
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- In #32472 I introduced a fix in order for all `after_teardown` method provided by libraries and Rails to run, even if the application's `teardown` method raised an error (That's the default minitest behavior). However this change wasn't enough and doesn't take in consideration the ancestors chain.
If a library's module containing an `after_teardown` method get included after the `SetupAndTeardown` module (one example is the [ActiveRecord::TestFixtures module](https://github.com/rails/rails/blob/7d2400ab61c8e3ed95e14d03ba3844e8ba2e36e4/activerecord/lib/active_record/fixtures.rb#L855-L856), then the ancestors of the test class would look something like
```ruby
class MyTest < ActiveSupport::TestCase
end
puts MyTest.ancestors # [MyTest, ActiveSupport::TestCase, ActiveRecord::TestFixtures, ActiveSupport::Testing::SetupAndTeardown]
```
Any class/module in the ancestors chain that are **before** the `ActiveSupport::Testing::SetupAndTeardown` will behave incorrectly:
- Their `before_setup` method will get called **after** all regular setup method
- Their `after_teardown` method won't even get called in case an exception is raised inside a regular's test `teardown`
A simple reproduction script of the problem here https://gist.github.com/Edouard-chin/70705542a59a8593f619b02e1c0a188c
- One solution to this problem is to have the `AS::SetupAndTeardown` module be the very first in the ancestors chain. By doing that we ensure that no `before_setup` / `after_teardown` get executed prior to running the teardown callbacks
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If you have a regular test that have a teardown block, and for any reason an exception get raised, ActiveSupport will not run subsequent after_teardown method provided by other module or gems.
One of them being the ActiveRecord::TestFixtures which won't rollback the transation when the test ends making all subsequent test to be in a weird state.
The default implementation of minitest is to run all teardown methods from the user's test, rescue all exceptions, run all after_teardown methods provided by libraries and finally re-raise the exception that happened in the user's teardown method.
Rails should do the same.
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https://bugs.ruby-lang.org/issues/12752
https://ruby-doc.org/core-2.4.0/String.html#method-i-unpack1
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Some places we can't remove because Ruby still don't have a method
equivalent to strip_heredoc to be called in an already existent string.
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Provides both a forked process and threaded parallelization options. To
use add `parallelize` to your 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 and test-database-1
respectively.
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.
For parallelization via threads a setup hook and cleanup hook are
provided.
```
class ActiveSupport::TestCase
parallelize_setup do |worker|
# setup databases
end
parallelize_teardown do |worker|
# cleanup database
end
parallelize(workers: 2)
end
```
[Eileen M. Uchitelle, Aaron Patterson]
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* Support hash as first argument for `assert_difference`.
This allows to specify multiple numeric differences in the same assertion.
Example:
assert_difference 'Article.count' => 1, 'Notification.count' => 2 do
# post :create, params: { article: {...} }
end
* Support error message when passing a hash as a first parameter
* Format CHANGELOG properly
[Julien Meichelbeck + Rafael Mendonça França]
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Add support for Minitest 5.11
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Runnable.marshal_dump/load was removed in
https://github.com/seattlerb/minitest/commit/00433fc0a4fdd0e6b302aace633384ba1312237
Instead, `Minitest::Result` is contained test result and the that can be
marshalled.
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danielma/dma/assert-changes-with-to-should-still-assert-change
`assert_changes` should always assert some change
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While using `assert_changes`, I came across some unexpected behavior:
if you provide a `to:` argument, and the expression matches but didn't
actually change, the assertion will pass.
The way `assert_changes` reads, I assumed that it would both assert
that there was any change at all, _and_ that the expression changed to
match my `to:` argument.
In the case of just a `from:` argument, `assert_changes` does what I
expect as well. It asserts that the before value `=== from` and that
the after value changed.
My key change is that `assert_changes` will now _always_ assert that
expression changes, no matter what combination of `from:` and `to:`
arguments
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If the current thread is preempted after the stub has been removed but
before the original method has been restored, then the other thread will
get a `NoMethodError` when it tries to call the method.
Using `silence_redefinition_of_method` instead of `undef_method` ensures
that either the stub or the original method is always in place.
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Seeing the previously issued PRs about it, we can avoid the `nil`
comparisons that can happen in `assert_changes` by using plain `assert`
calls.
This is to avoid a deprecation warning about comparing `nil` values in
`assert_equal` for Minitest 5 and a crash in Minitest 6.
You can see the preparations done in [`assert_equal`][ae]. You can also
see that [`assert`][a] does not care about `nil`s.
[ae]: https://github.com/seattlerb/minitest/blob/ca6a71ca901016db09a5ad466b4adea4b52a504a/lib/minitest/assertions.rb#L159-L188
[a]: https://github.com/seattlerb/minitest/blob/ca6a71ca901016db09a5ad466b4adea4b52a504a/lib/minitest/assertions.rb#L131-L142
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These changes resolve a deprecation warning in `assert_no_changes`
when asserting that an expression evaluates to `nil` before and after
the passed block is evaluated.
The smallest demonstration of this edge case:
```ruby
assert_no_changes "nil" do
true # noop
end
```
Under the covers, this is evaluating
```ruby
assert_equal nil, nil
```
Minitest 5 issues a deprecation warning, and Minitest will fail
completely.
For additional context, the motivations and implications of this change
to Minitest have been discussed at length in [seattlerb/minitest#666][].
[seattlerb/minitest#666]: https://github.com/seattlerb/minitest/issues/666
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This basically reverts 8da30ad6be34339124ba4cb4e36aea260dda12bc
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Remove time stubs after each test
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Reverts 7abb6e0.
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[ci skip]
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