Module: ActiveSupport::Testing::Deprecation

Included in:
ActiveSupport::TestCase
Defined in:
lib/active_support/testing/deprecation.rb

Instance Method Summary collapse

Instance Method Details

#assert_deprecated(match = nil, deprecator = nil, &block) ⇒ Object

:call-seq:

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



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# File '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

#assert_not_deprecated(deprecator, &block) ⇒ Object

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



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# File '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

#collect_deprecations(deprecator) ⇒ Object

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"]]



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# File '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