One of the most useful applications of Rspec-puppet I have found is in the verification of generated ERB file content. However, it is not always obvious how to actually do this.
I discovered the
verify_contents method one day when pondering a question at Ask.puppet.com (ref). An undocumented feature of the Puppetlabs_spec_helper, it is used in a few Forge modules to allow testers to say, “the catalog should contain a file X, whose contents should contain lines A, B, ..”. For example, in the Haproxy module here.
In this post I’m going to document how I’ve used the
verify_contents method and improved upon it when testing ERB generated file content.
The basic usage of
verify_contents is as follows: