vendor/rails/activesupport/lib/active_support/testing/deprecation.rb

   1 module ActiveSupport
   2   module Testing
   3     module Deprecation #:nodoc:
   4       def assert_deprecated(match = nil, &block)
   5         result, warnings = collect_deprecations(&block)
   6         assert !warnings.empty?, "Expected a deprecation warning within the block but received none"
   7         if match
   8           match = Regexp.new(Regexp.escape(match)) unless match.is_a?(Regexp)
   9           assert warnings.any? { |w| w =~ match }, "No deprecation warning matched #{match}: #{warnings.join(', ')}"
  10         end
  11         result
  12       end
  13
  14       def assert_not_deprecated(&block)
  15         result, deprecations = collect_deprecations(&block)
  16         assert deprecations.empty?, "Expected no deprecation warning within the block but received #{deprecations.size}: \n  #{deprecations * "\n  "}"
  17         result
  18       end
  19
  20       private
  21         def collect_deprecations
  22           old_behavior = ActiveSupport::Deprecation.behavior
  23           deprecations = []
  24           ActiveSupport::Deprecation.behavior = Proc.new do |message, callstack|
  25             deprecations << message
  26           end
  27           result = yield
  28           [result, deprecations]
  29         ensure
  30           ActiveSupport::Deprecation.behavior = old_behavior
  31         end
  32     end
  33   end
  34 end
  35
  36 begin
  37   require 'test/unit/error'
  38
  39   module Test
  40     module Unit
  41       class Error # :nodoc:
  42         # Silence warnings when reporting test errors.
  43         def message_with_silenced_deprecation
  44           ActiveSupport::Deprecation.silence do
  45             message_without_silenced_deprecation
  46           end
  47         end
  48
  49         alias_method_chain :message, :silenced_deprecation
  50       end
  51     end
  52   end
  53 rescue LoadError
  54   # Using miniunit, ignore.
  55 end