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