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<?php
/**
* Class Jetpack_Constants
*
* Testing constants is hard. Once you define a constant, it's defined. Jetpack_Constants is an
* abstraction layer so that unit tests can set "constants" for tests.
*
* To test your code, you'll need to swap out `defined( 'CONSTANT' )` with `Jetpack_Constants::is_defined( 'CONSTANT' )`
* and replace `CONSTANT` with `Jetpack_Constants::get_constant( 'CONSTANT' )`. Then in the unit test, you can set the
* constant with `Jetpack::set_constant( 'CONSTANT', $value )` and then clean up after each test with something like
* this:
*
* function tearDown() {
* Jetpack_Constants::clear_constants();
* }
*/
class Jetpack_Constants {
static $set_constants = array();
/**
* Checks if a "constant" has been set in Jetpack_Constants, and if not,
* checks if the constant was defined with define( 'name', 'value ).
*
* @param $name string The name of the constant
*
* @return bool
*/
public static function is_defined( $name ) {
return array_key_exists( $name, self::$set_constants )
? true
: defined( $name );
}
/**
* Attempts to retrieve the "constant" from Jetpack_Constants, and if it hasn't been set,
* then attempts to get the constant with the constant() function.
*
* @param $name
*
* @return mixed null if the constant does not exist or the value of the constant.
*/
public static function get_constant( $name ) {
if ( array_key_exists( $name, self::$set_constants ) ) {
return self::$set_constants[ $name ];
}
return defined( $name ) ? constant( $name ) : null;
}
/**
* Sets the value of the "constant" within Jetpack_Constants.
*
* @param $name string The name of the "constant"
* @param $value string The value of the "constant"
*/
public static function set_constant( $name, $value ) {
self::$set_constants[ $name ] = $value;
}
/**
* Will unset a "constant" from Jetpack_Constants if the constant exists.
*
* @param $name string The name of the "constant"
*
* @return bool Whether the constant was removed.
*/
public static function clear_single_constant( $name ) {
if ( ! array_key_exists( $name, self::$set_constants ) ) {
return false;
}
unset( self::$set_constants[ $name ] );
return true;
}
/**
* Resets all of the constants within Jetpack_Constants.
*/
public static function clear_constants() {
self::$set_constants = array();
}
}
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