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rails--rails/activesupport/test/current_attributes_test.rb
David Heinemeier Hansson 24a864437e ActiveSupport::CurrentAttributes provides a thread-isolated attributes singleton (#29180)
* Add ActiveSupport::CurrentAttributes to provide a thread-isolated attributes singleton

* Need to require first

* Move stubs into test namespace.

Thus they won't conflict with other Current and Person stubs.

* End of the line for you, whitespace!

* Support super in attribute methods.

Define instance level accessors in an included module such that
`super` in an overriden accessor works, akin to Active Model.

* Spare users the manual require.

Follow the example of concerns, autoload in the top level Active Support file.

* Add bidelegation support

* Rename #expose to #set. Simpler, clearer

* Automatically reset every instance.

Skips the need for users to actively embed something that resets
their CurrentAttributes instances.

* Fix test name; add tangible name value when blank.

* Try to ensure we run after a request as well.

* Delegate all missing methods to the instance

This allows regular `delegate` to serve, so we don't need bidelegate.

* Properly test resetting after execution cycle.

Also remove the stale puts debugging.

* Update documentation to match new autoreset
2017-05-26 20:00:27 +02:00

96 lines
2.5 KiB
Ruby

require "abstract_unit"
class CurrentAttributesTest < ActiveSupport::TestCase
Person = Struct.new(:name, :time_zone)
class Current < ActiveSupport::CurrentAttributes
attribute :world, :account, :person, :request
delegate :time_zone, to: :person
resets { Time.zone = "UTC" }
def account=(account)
super
self.person = "#{account}'s person"
end
def person=(person)
super
Time.zone = person.try(:time_zone)
end
def request
"#{super} something"
end
def intro
"#{person.name}, in #{time_zone}"
end
end
setup { Current.reset }
test "read and write attribute" do
Current.world = "world/1"
assert_equal "world/1", Current.world
end
test "read overwritten attribute method" do
Current.request = "request/1"
assert_equal "request/1 something", Current.request
end
test "set attribute via overwritten method" do
Current.account = "account/1"
assert_equal "account/1", Current.account
assert_equal "account/1's person", Current.person
end
test "set auxiliary class via overwritten method" do
Current.person = Person.new("David", "Central Time (US & Canada)")
assert_equal "Central Time (US & Canada)", Time.zone.name
end
test "resets auxiliary class via callback" do
Current.person = Person.new("David", "Central Time (US & Canada)")
assert_equal "Central Time (US & Canada)", Time.zone.name
Current.reset
assert_equal "UTC", Time.zone.name
end
test "set attribute only via scope" do
Current.world = "world/1"
Current.set(world: "world/2") do
assert_equal "world/2", Current.world
end
assert_equal "world/1", Current.world
end
test "set multiple attributes" do
Current.world = "world/1"
Current.account = "account/1"
Current.set(world: "world/2", account: "account/2") do
assert_equal "world/2", Current.world
assert_equal "account/2", Current.account
end
assert_equal "world/1", Current.world
assert_equal "account/1", Current.account
end
test "delegation" do
Current.person = Person.new("David", "Central Time (US & Canada)")
assert_equal "Central Time (US & Canada)", Current.time_zone
assert_equal "Central Time (US & Canada)", Current.instance.time_zone
end
test "all methods forward to the instance" do
Current.person = Person.new("David", "Central Time (US & Canada)")
assert_equal "David, in Central Time (US & Canada)", Current.intro
assert_equal "David, in Central Time (US & Canada)", Current.instance.intro
end
end