Tests: Cover HTTP encoding and compression helpers.
Add coverage for WP_Http_Encoding compression, decompression, optional gzip headers, invalid input, encoding negotiation, filter arguments, response headers, and compression availability.
Generate compressed fixtures after checking required functions, and use valid gzip header checksums.
Developed in: https://github.com/WordPress/wordpress-develop/pull/14174
Props huzaifaalmesbah.
See #65819.
Javascript required