How to create custom Expectations for Spark

Admonition from Mr. Dickens

“Whether I shall turn out to be the hero of my own life, or whether that station will be held by anybody else, these pages must show.”

This guide is a stub. We all know that it will be useful, but no one has made time to write it yet.

If it would be useful to you, please comment with a +1 and feel free to add any suggestions or questions below.

If you want to be a real hero, we’d welcome a pull request. Please see the Contributing tutorial and How to write a how to guide to get started.