1e21a4bcab
PHP's reflection mechanism is weird: reflecting on a private method will find it even if it's defined in a parent class, while reflecting on a private property just fails. It would likely be more useful if TestingAccessWrapper could find private properties defined in parent classes, so let's make that happen. Change-Id: I9cfdde2694136d0e4559cc419a528762ea14ae4b
76 lines
2.3 KiB
PHP
76 lines
2.3 KiB
PHP
<?php
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/**
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* Circumvent access restrictions on object internals
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*
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* This can be helpful for writing tests that can probe object internals,
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* without having to modify the class under test to accomodate.
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*
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* Wrap an object with private methods as follows:
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* $title = TestingAccessWrapper::newFromObject( Title::newFromDBkey( $key ) );
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*
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* You can access private and protected instance methods and variables:
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* $formatter = $title->getTitleFormatter();
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*
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* TODO:
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* - Provide access to static methods and properties.
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* - Organize other helper classes in tests/testHelpers.inc into a directory.
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*/
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class TestingAccessWrapper {
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public $object;
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/**
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* Return the same object, without access restrictions.
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*/
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public static function newFromObject( $object ) {
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$wrapper = new TestingAccessWrapper();
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$wrapper->object = $object;
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return $wrapper;
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}
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public function __call( $method, $args ) {
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$classReflection = new ReflectionClass( $this->object );
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$methodReflection = $classReflection->getMethod( $method );
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$methodReflection->setAccessible( true );
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return $methodReflection->invokeArgs( $this->object, $args );
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}
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/**
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* ReflectionClass::getProperty() fails if the private property is defined
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* in a parent class. This works more like ReflectionClass::getMethod().
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*/
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private function getProperty( $name ) {
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$classReflection = new ReflectionClass( $this->object );
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try {
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return $classReflection->getProperty( $name );
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} catch ( ReflectionException $ex ) {
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while ( true ) {
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$classReflection = $classReflection->getParentClass();
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if ( !$classReflection ) {
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throw $ex;
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}
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try {
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$propertyReflection = $classReflection->getProperty( $name );
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} catch ( ReflectionException $ex2 ) {
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continue;
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}
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if ( $propertyReflection->isPrivate() ) {
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return $propertyReflection;
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} else {
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throw $ex;
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}
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}
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}
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}
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public function __set( $name, $value ) {
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$propertyReflection = $this->getProperty( $name );
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$propertyReflection->setAccessible( true );
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$propertyReflection->setValue( $this->object, $value );
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}
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public function __get( $name ) {
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$propertyReflection = $this->getProperty( $name );
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$propertyReflection->setAccessible( true );
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return $propertyReflection->getValue( $this->object );
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}
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}
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