Mocking WordPress Constants

Certain constants need to be mocked, otherwise various WordPress functions will attempt to include files that just don't exist.

For example, nearly all uses of the WP_Http API require first including:

ABSPATH . WPINC . '/class-http.php'

If these constants are not set, and files do not exist at the location they specify, functions referencing them will produce a fatal error.

By default, WP_Mock will mock the following constants:

Constant	Default mocked value
WP_CONTENT_DIR	__DIR__ . '/dummy-files'
ABSPATH	''
WPINC	__DIR__ . '/dummy-files/wp-includes'
EZSQL_VERSION	'WP1.25'
OBJECT	'OBJECT'
Object	'OBJECT'
object	'OBJECT'
OBJECT_K	'OBJECT_K'
ARRAY_A	'ARRAY_A'
ARRAY_N	'ARRAY_N'

WP_Mock provides a few dummy files, located in the ./php/WP_Mock/API/dummy-files/ directory. These files are used to mock the WP_CONTENT_DIR and WPINC constants, as shown in the table above.

The ! defined check is used for all constants, so that individual test environments can override the normal default by setting constants in a bootstrap configuration file.