[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/Strategy/RemoveForeignElements_ErrorsTest.php

@@ -0,0 +1,57 @@
+<?php
+
+require_once 'HTMLPurifier/ErrorsHarness.php';
+require_once 'HTMLPurifier/Strategy/RemoveForeignElements.php';
+
+class HTMLPurifier_Strategy_RemoveForeignElements_ErrorsTest extends HTMLPurifier_ErrorsHarness
+{
+    
+    function setup() {
+        parent::setup();
+        $this->config->set('HTML', 'TidyLevel', 'heavy');
+    }
+    
+    function invoke($input) {
+        $strategy = new HTMLPurifier_Strategy_RemoveForeignElements();
+        $lexer = new HTMLPurifier_Lexer_DirectLex();
+        $tokens = $lexer->tokenizeHTML($input, $this->config, $this->context);
+        $strategy->execute($tokens, $this->config, $this->context);
+    }
+    
+    function testTagTransform() {
+        // uses $CurrentToken.Serialized
+        $this->expectErrorCollection(E_NOTICE, 'Strategy_RemoveForeignElements: Tag transform', 'center');
+        $this->invoke('<center>');
+    }
+    
+    function testMissingRequiredAttr() {
+        // a little fragile, since img has two required attributes
+        $this->expectErrorCollection(E_ERROR, 'Strategy_RemoveForeignElements: Missing required attribute', 'img', 'alt');
+        $this->invoke('<img />');
+    }
+    
+    function testForeignElementToText() {
+        $this->config->set('Core', 'EscapeInvalidTags', true);
+        $this->expectErrorCollection(E_WARNING, 'Strategy_RemoveForeignElements: Foreign element to text', 'cannot-possibly-exist-element');
+        $this->invoke('<cannot-possibly-exist-element>');
+    }
+    
+    function testForeignElementRemoved() {
+        $this->expectErrorCollection(E_ERROR, 'Strategy_RemoveForeignElements: Foreign element removed', 'cannot-possibly-exist-element');
+        $this->invoke('<cannot-possibly-exist-element>');
+    }
+    
+    function testCommentRemoved() {
+        $this->expectErrorCollection(E_ERROR, 'Strategy_RemoveForeignElements: Comment removed', ' test ');
+        $this->invoke('<!-- test -->');
+    }
+    
+    function testScriptRemoved() {
+        $this->collector->expectAt(0, 'send', array(E_ERROR, 'Strategy_RemoveForeignElements: Script removed'));
+        $this->collector->expectAt(1, 'send', array(E_ERROR, 'Strategy_RemoveForeignElements: Token removed to end', 'script'));
+        $this->invoke('<script>asdf');
+    }
+    
+}
+
+?>