with_message + strict + against doesn't seem to work

[mcmire]

When using allow_value in combination with with_message(..., against: ...) and strict, against seems to be getting ignored.

Example:

it do
  should_not allow_value('34:21:92')
    .for(:time)
    .with_message('is not a valid date/time', against: :starts_at)
    .strict
end

This will produce an error like:

After setting :time to ‹"34:21:92"›, the matcher expected the FollowUp to be invalid and to raise a validation exception with message "is not a valid date/time". The record was indeed invalid, but the exception message was "Starts at is not a valid date/time" instead.

In order to fix this, I need to say:

it do
  should_not allow_value('34:21:92')
    .for(:time)
    .with_message('Starts at is not a valid date/time')
    .strict
end

But this seems to defeat the point of using against.