Support :uuid column type for validate_absence_of matcher

[dlupu]

Hello,

I run into a case where I needed to make sure that an uuid column was empty but could not use validate_absence_of matcher.

It tried to set the column with "an arbitrary value" which is not a valid uuid value.

This Pull Requests attempts to fix the situation.

[vsppedro]

Hi, @dlupu, thank you very much for your contribution!

There is only one detail: rubocop detected trailing whitespace. Would be possible to fix that, please?

About the error with 3.1.2, rails_6_0 and PostgreSQL I'll take a closer look as soon as I have some time.

I did not notice the error on Test / build (3.1.2, rails_6_0, postgresql)

[dlupu]

@vsppedro sorry for the late reply.

I fixed the rubocop issue.

However, I'm surprised about the error that appears only on Test / build (3.1.2, rails_6_0, postgresql). I've cloned the code locally and run the failing test on my machine using

• ruby 3.1.2
• appraisal rails_6_0
• postgresql db adapter

The tests passes ....

[dlupu]

@vsppedro it seems that Test / build (3.1.2, rails_6_0, postgresql) is green not. I also fixed the last rubocop issue, please trigger the CI again.

[vsppedro]

Hi @dlupu, thanks for working on this. The failure we had earlier looks like an intermittent test. It was probably not caused by your changes. I'll keep an eye on that. Thank you again!