<?php

require_once 'HTMLPurifier/Context.php';

// mocks
require_once 'HTMLPurifier/IDAccumulator.php';

class HTMLPurifier_ContextTest extends UnitTestCase
{
    
    var $context;
    
    function setUp() {
        $this->context = new HTMLPurifier_Context();
    }
    
    function testStandardUsage() {
        
        generate_mock_once('HTMLPurifier_IDAccumulator');
        
        $this->assertFalse($this->context->exists('IDAccumulator'));
        
        $accumulator = new HTMLPurifier_IDAccumulatorMock($this);
        $this->context->register('IDAccumulator', $accumulator);
        $this->assertTrue($this->context->exists('IDAccumulator'));
        
        $accumulator_2 =& $this->context->get('IDAccumulator');
        $this->assertReference($accumulator, $accumulator_2);
        
        $this->context->destroy('IDAccumulator');
        $this->assertFalse($this->context->exists('IDAccumulator'));
        
        $this->expectError('Attempted to retrieve non-existent variable IDAccumulator');
        $accumulator_3 =& $this->context->get('IDAccumulator');
        $this->assertNull($accumulator_3);
        
        $this->expectError('Attempted to destroy non-existent variable IDAccumulator');
        $this->context->destroy('IDAccumulator');
        
    }
    
    function testReRegister() {
        
        $var = true;
        $this->context->register('OnceOnly', $var);
        
        $this->expectError('Name OnceOnly produces collision, cannot re-register');
        $this->context->register('OnceOnly', $var);
        
        // destroy it, now registration is okay
        $this->context->destroy('OnceOnly');
        $this->context->register('OnceOnly', $var);
        
    }
    
    function test_loadArray() {
        
        // references can be *really* wonky!
        
        $context_manual = new HTMLPurifier_Context();
        $context_load   = new HTMLPurifier_Context();
        
        $var1 = 1;
        $var2 = 2;
        
        $context_manual->register('var1', $var1);
        $context_manual->register('var2', $var2);
        
        // you MUST set up the references when constructing the array,
        // otherwise the registered version will be a copy
        $array = array(
            'var1' => &$var1,
            'var2' => &$var2
        );
        
        $context_load->loadArray($array);
        $this->assertIdentical($context_manual, $context_load);
        
        $var1 = 10;
        $var2 = 20;
        
        $this->assertIdentical($context_manual, $context_load);
        
    }
    
}

?>