htmlpurifier/tests/HTMLPurifier/IDAccumulatorTest.php

<?php

class HTMLPurifier_IDAccumulatorTest extends HTMLPurifier_Harness
{

    function test() {

        // initialize the accumulator
        $accumulator = new HTMLPurifier_IDAccumulator();

        $this->assertTrue( $accumulator->add('id1'));
        $this->assertTrue( $accumulator->add('id2'));
        $this->assertFalse($accumulator->add('id1')); // repeated id

        // you can also access the properties (they're public)
        $this->assertTrue( isset($accumulator->ids['id2']) );

    }

    function testLoad() {

        $accumulator = new HTMLPurifier_IDAccumulator();

        $accumulator->load(array('id1', 'id2', 'id3'));

        $this->assertFalse($accumulator->add('id1')); // repeated id
        $this->assertTrue($accumulator->add('id4'));

    }

    function testBuild() {
        $this->config->set('Attr', 'IDBlacklist', array('foo'));
        $accumulator = HTMLPurifier_IDAccumulator::build($this->config, $this->context);
        $this->assertTrue( isset($accumulator->ids['foo']) );
    }

}