[2.0.1] Implement error collection for RemoveForeignElements.

- Register Generator context variable.
- Implement special substitutions for error collector.
- Also sort by order the errors came in.
- Fix line number determination bug in Lexer::create().
- Remove vestigial variables.
- Force all tag transforms to use copy(), implement serialize, unserialize algorithm for copy() in tokens.

git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@1238 48356398-32a2-884e-a903-53898d9a118a

tests/HTMLPurifier/ErrorsHarness.php

@@ -0,0 +1,27 @@
+<?php
+
+require_once 'HTMLPurifier/ErrorCollector.php';
+require_once 'HTMLPurifier/Lexer/DirectLex.php';
+
+class HTMLPurifier_ErrorsHarness extends UnitTestCase
+{
+    
+    var $config, $context;
+    var $collector, $generator;
+    
+    function setup() {
+        $this->config = HTMLPurifier_Config::create(array('Core.CollectErrors' => true));
+        $this->context = new HTMLPurifier_Context();
+        generate_mock_once('HTMLPurifier_ErrorCollector');
+        $this->collector = new HTMLPurifier_ErrorCollectorMock($this);
+        $this->context->register('ErrorCollector', $this->collector);
+    }
+    
+    function expectErrorCollection() {
+        $args = func_get_args();
+        $this->collector->expectOnce('send', $args);
+    }
+    
+}
+
+?>