Methods

Instance Public methods

assert_deprecated(deprecator, &block)
assert_deprecated(match, deprecator, &block)

Asserts that a matching deprecation warning was emitted by the given deprecator during the execution of the yielded block.

assert_deprecated(/foo/, CustomDeprecator) do
  CustomDeprecator.warn "foo should no longer be used"
end

The match object may be a Regexp, or String appearing in the message.

assert_deprecated('foo', CustomDeprecator) do
  CustomDeprecator.warn "foo should no longer be used"
end

If the match is omitted (or explicitly nil), any deprecation warning will match.

assert_deprecated(CustomDeprecator) do
  CustomDeprecator.warn "foo should no longer be used"
end
📝 Source code 
# File activesupport/lib/active_support/testing/deprecation.rb, line 30
      def assert_deprecated(match = nil, deprecator = nil, &block)
        match, deprecator = nil, match if match.is_a?(ActiveSupport::Deprecation)

        unless deprecator
          raise ArgumentError, "No deprecator given"
        end

        result, warnings = collect_deprecations(deprecator, &block)
        assert !warnings.empty?, "Expected a deprecation warning within the block but received none"
        if match
          match = Regexp.new(Regexp.escape(match)) unless match.is_a?(Regexp)
          assert warnings.any? { |w| match.match?(w) }, "No deprecation warning matched #{match}: #{warnings.join(', ')}"
        end
        result
      end
🔎 See on GitHub

assert_not_deprecated(deprecator, &block)

Asserts that no deprecation warnings are emitted by the given deprecator during the execution of the yielded block.

assert_not_deprecated(CustomDeprecator) do
  CustomDeprecator.warn "message" # fails assertion
end

assert_not_deprecated(ActiveSupport::Deprecation.new) do
  CustomDeprecator.warn "message" # passes assertion, different deprecator
end
📝 Source code 
# File activesupport/lib/active_support/testing/deprecation.rb, line 55
      def assert_not_deprecated(deprecator, &block)
        result, deprecations = collect_deprecations(deprecator, &block)
        assert deprecations.empty?, "Expected no deprecation warning within the block but received #{deprecations.size}: \n  #{deprecations * "\n  "}"
        result
      end
🔎 See on GitHub

collect_deprecations(deprecator)

Returns the return value of the block and an array of all the deprecation warnings emitted by the given deprecator during the execution of the yielded block.

collect_deprecations(CustomDeprecator) do
  CustomDeprecator.warn "message"
  ActiveSupport::Deprecation.new.warn "other message"
  :result
end # => [:result, ["message"]]
📝 Source code 
# File activesupport/lib/active_support/testing/deprecation.rb, line 69
      def collect_deprecations(deprecator)
        old_behavior = deprecator.behavior
        deprecations = []
        deprecator.behavior = Proc.new do |message, callstack|
          deprecations << message
        end
        result = yield
        [result, deprecations]
      ensure
        deprecator.behavior = old_behavior
      end
🔎 See on GitHub