Add a context for editing the latest post

[ataylorme]

Description

This context allows for easy verification of new content by editing the latest post of a specific type and status.

I am using the wp-cli driver, specifically the ability to call arbitrary wp-cli commands. In this case, wp post list, which allows for WP_Query arguments. I am not sure if this can be adapted to use a different method compatible with other drivers.

Related issue

Motivation and context

I use this context to check that new posts exist after specific previous steps. For example, checking that a new order has the correct information after an e-commerce purchase or checking that a donation exists after a donation form is submitted on the front-end.

How has this been tested?

I've tested on various post types and statuses.

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.