* Add option to set parallel test worker count to the physical core count of the machine
Also, use the physical core count of the machine as
the default number of workers, and generate the `test_helper.rb` file
with `parallelize(workers: :number_of_processors)`
Closes#34734
* Ensure that we always test parallel testing
Since #34734 we decided to use the physical core count of the machine as
the default number of workers in the parallel testing, we need to
ensure that some tests use at least 2 workers because we could
run those tests on VM that has only 1 physical core.
It also fixes tests failures on the CI since Travis server we are using
has only one physical core.
See https://travis-ci.org/rails/rails/jobs/469281088#L2352
* Extend documentation of `ActiveSupport::Notifications.subscribe`
Add mention that a block with only one argument passed to the method
will yield an event object.
Related to #33451
* Emphasize that `SubscribeEventObjects` is a test class by adding suffix `Test`
… by switching the initialzation of an appropriate response parser
in `ActionDispatch::TestResponse` from eagerly to lazily.
By doing so, the response parser can be correctly set for
`ActionController::TestCase`, which doesn't include
the content type header in the constructor but only sets it at
a later time.
Fixes#34676.
The ActionDispatch::HostAuthorization is a new middleware that prevent
against DNS rebinding and other Host header attacks. By default it is
included only in the development environment with the following
configuration:
Rails.application.config.hosts = [
IPAddr.new("0.0.0.0/0"), # All IPv4 addresses.
IPAddr.new("::/0"), # All IPv6 addresses.
"localhost" # The localhost reserved domain.
]
In other environments, `Rails.application.config.hosts` is empty and no
Host header checks will be done. If you want to guard against header
attacks on production, you have to manually permit the allowed hosts
with:
Rails.application.config.hosts << "product.com"
The host of a request is checked against the hosts entries with the case
operator (#===), which lets hosts support entries of type RegExp,
Proc and IPAddr to name a few. Here is an example with a regexp.
# Allow requests from subdomains like `www.product.com` and
# `beta1.product.com`.
Rails.application.config.hosts << /.*\.product\.com/
A special case is supported that allows you to permit all sub-domains:
# Allow requests from subdomains like `www.product.com` and
# `beta1.product.com`.
Rails.application.config.hosts << ".product.com"
If a klass has acceptance validation and then
`klass.undefine_attribute_methods` is happened before an attribute
method is called, infinit loop is caused on the `method_missing` defined
by the `LazilyDefineAttributes`.
https://travis-ci.org/rails/rails/jobs/467053984#L1409
To prevent the infinit loop, the `method_missing` should ensure
`klass.define_attribute_methods`.
When actually execute from the command, the value of ARGV is passed to the
server. So they are String. So let's use the same type in the test.
Also, this removes the following warning in Ruby 2.6.
```
lib/rails/commands/server/server_command.rb:195: warning: deprecated Object#=~ is called on Integer; it always returns nil
```
BEGIN transaction would cause COMMIT or ROLLBACK, so unless COMMIT and
ROLLBACK aren't treated as write queries as well as BEGIN, the
`ReadOnlyError` would be raised.
