GitHub - Automattic/cheeztest: Adding some LOLs to your server-side WordPress A/B testing. Plays nice with Batcache.

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Name		Name	Last commit message	Last commit date
Latest commit History 22 Commits
.github/workflows		.github/workflows
bin		bin
tests		tests
.editorconfig		.editorconfig
.gitignore		.gitignore
.phpcs.xml.dist		.phpcs.xml.dist
LICENSE.txt		LICENSE.txt
cheeztest-examples.php		cheeztest-examples.php
cheeztest.php		cheeztest.php
composer.json		composer.json
phpunit.xml.dist		phpunit.xml.dist
readme.txt		readme.txt

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CheezTest lets you create and run Batcache-compatible server-side A/B tests in your theme.

A joint LOL by the fine folks I Can Has Cheezburger (http://www.cheezburger.com) and Automattic (http://automattic.com)

Main class from which all A/B tests are inherited. Enables fast setup
of A/B tests - upon initialization, the basic order of execution is:
set test name > check if user is qualified to participate > check
if user has been assigned a segment, and assign if not > assign user
to group > execute 'action' callback if present.

User's qualification, segment, and group tests are done in batcache
so as to ensure correct cache variants are served.

User's segment is assigned server-side via magic. Mutliple test
segments are assigned at once - so if a user is qualified to participate
in more than one test, all segments are assigned at the same time. When
segments need to be set, a small javascript is injected into the <head>
via a call to CheezTest::write_segment_cookie(). This javascript
sets a cookie to retain the segment assigned earlier.

Test case data (name, is_qualified, & group) are stored in the $active_tests
static hash and made accessible via the 'is_qualified_for', 'get_group_for', and
'is_in_group' static methods. This enables theme branching via:

if ( CheezTest::is_qualified_for( 'my-example-test' ) {
    //test-specific stuff goes here
}

- or -

if ( CheezTest::is_in_group( 'my-example-test', 'my-example-group' ) ) {
   //group-specific stuff goes here
}

The plugin makes use of Batcache’s support for vary_cache_on_function, which saves page variants in a page’s cache and then evaluates which one to serve when the page loads.

IMPORTANT: Since the tests run before Batcache, which in turn runs very early (before theme code is included), only built-in PHP functions and jetpack_is_mobile() can be used when defining tests. Any theme-specific functions will not be available.