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e35b98e6f5
Follows the same pattern as controllers and jobs. Exceptions raised in
delivery jobs (enqueued by `#deliver_later`) are also delegated to the
mailer's rescue_from handlers, so you can handle the DeserializationError
raised by delivery jobs:
```ruby
class MyMailer < ApplicationMailer
rescue_from ActiveJob::DeserializationError do
…
end
```
ActiveSupport::Rescuable polish:
* Add the `rescue_with_handler` class method so exceptions may be
handled at the class level without requiring an instance.
* Rationalize `exception.cause` handling. If no handler matches the
exception, fall back to the handler that matches its cause.
* Handle exceptions raised elsewhere. Pass `object: …` to execute
the `rescue_from` handler (e.g. a method call or a block to
instance_exec) against a different object. Defaults to `self`.
143 lines
3 KiB
Ruby
143 lines
3 KiB
Ruby
require 'abstract_unit'
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class WraithAttack < StandardError
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end
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class MadRonon < StandardError
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end
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class CoolError < StandardError
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end
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module WeirdError
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def self.===(other)
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Exception === other && other.respond_to?(:weird?)
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end
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end
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class Stargate
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# Nest this so the 'NuclearExplosion' handler needs a lexical const_get
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# to find it.
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class NuclearExplosion < StandardError; end
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attr_accessor :result
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include ActiveSupport::Rescuable
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rescue_from WraithAttack, :with => :sos_first
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rescue_from WraithAttack, :with => :sos
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rescue_from 'NuclearExplosion' do
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@result = 'alldead'
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end
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rescue_from MadRonon do |e|
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@result = e.message
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end
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rescue_from WeirdError do
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@result = 'weird'
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end
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def dispatch(method)
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send(method)
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rescue Exception => e
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rescue_with_handler(e)
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end
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def attack
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raise WraithAttack
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end
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def nuke
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raise NuclearExplosion
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end
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def ronanize
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raise MadRonon.new("dex")
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end
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def fall_back_to_cause
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# This exception is the cause and has a handler.
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ronanize
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rescue
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# This is the exception we'll handle that doesn't have a cause.
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raise 'unhandled RuntimeError with a handleable cause'
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end
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def weird
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StandardError.new.tap do |exc|
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def exc.weird?
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true
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end
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raise exc
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end
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end
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def sos
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@result = 'killed'
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end
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def sos_first
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@result = 'sos_first'
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end
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end
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class CoolStargate < Stargate
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attr_accessor :result
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include ActiveSupport::Rescuable
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rescue_from CoolError, :with => :sos_cool_error
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def sos_cool_error
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@result = 'sos_cool_error'
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end
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end
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class RescuableTest < ActiveSupport::TestCase
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def setup
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@stargate = Stargate.new
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@cool_stargate = CoolStargate.new
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end
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def test_rescue_from_with_method
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@stargate.dispatch :attack
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assert_equal 'killed', @stargate.result
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end
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def test_rescue_from_with_block
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@stargate.dispatch :nuke
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assert_equal 'alldead', @stargate.result
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end
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def test_rescue_from_with_block_with_args
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@stargate.dispatch :ronanize
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assert_equal 'dex', @stargate.result
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end
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def test_rescue_from_error_dispatchers_with_case_operator
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@stargate.dispatch :weird
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assert_equal 'weird', @stargate.result
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end
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def test_rescues_defined_later_are_added_at_end_of_the_rescue_handlers_array
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expected = ["WraithAttack", "WraithAttack", "NuclearExplosion", "MadRonon", "WeirdError"]
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result = @stargate.send(:rescue_handlers).collect(&:first)
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assert_equal expected, result
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end
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def test_children_should_inherit_rescue_definitions_from_parents_and_child_rescue_should_be_appended
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expected = ["WraithAttack", "WraithAttack", "NuclearExplosion", "MadRonon", "WeirdError", "CoolError"]
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result = @cool_stargate.send(:rescue_handlers).collect(&:first)
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assert_equal expected, result
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end
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def test_rescue_falls_back_to_exception_cause
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@stargate.dispatch :fall_back_to_cause
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assert_equal 'unhandled RuntimeError with a handleable cause', @stargate.result
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end
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end
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