Added simpletest and start of unit tests.

git-svn-id: http://code.elgg.org/elgg/trunk@3503 36083f99-b078-4883-b0ff-0f9b5a30f544

1 files changed, 551 insertions, 0 deletions

diff --git a/vendors/simpletest/test/parser_test.php b/vendors/simpletest/test/parser_test.php
new file mode 100755
index 000000000..83268d9e1
--- /dev/null
+++ b/vendors/simpletest/test/parser_test.php
@@ -0,0 +1,551 @@
+<?php
+// $Id: parser_test.php 1608 2007-12-27 09:03:07Z pp11 $
+require_once(dirname(__FILE__) . '/../autorun.php');
+require_once(dirname(__FILE__) . '/../parser.php');
+Mock::generate('SimpleHtmlSaxParser');
+Mock::generate('SimpleSaxListener');
+
+class TestOfParallelRegex extends UnitTestCase {
+    
+    function testNoPatterns() {
+        $regex = &new ParallelRegex(false);
+        $this->assertFalse($regex->match("Hello", $match));
+        $this->assertEqual($match, "");
+    }
+    
+    function testNoSubject() {
+        $regex = &new ParallelRegex(false);
+        $regex->addPattern(".*");
+        $this->assertTrue($regex->match("", $match));
+        $this->assertEqual($match, "");
+    }
+    
+    function testMatchAll() {
+        $regex = &new ParallelRegex(false);
+        $regex->addPattern(".*");
+        $this->assertTrue($regex->match("Hello", $match));
+        $this->assertEqual($match, "Hello");
+    }
+    
+    function testCaseSensitive() {
+        $regex = &new ParallelRegex(true);
+        $regex->addPattern("abc");
+        $this->assertTrue($regex->match("abcdef", $match));
+        $this->assertEqual($match, "abc");
+        $this->assertTrue($regex->match("AAABCabcdef", $match));
+        $this->assertEqual($match, "abc");
+    }
+    
+    function testCaseInsensitive() {
+        $regex = &new ParallelRegex(false);
+        $regex->addPattern("abc");
+        $this->assertTrue($regex->match("abcdef", $match));
+        $this->assertEqual($match, "abc");
+        $this->assertTrue($regex->match("AAABCabcdef", $match));
+        $this->assertEqual($match, "ABC");
+    }
+    
+    function testMatchMultiple() {
+        $regex = &new ParallelRegex(true);
+        $regex->addPattern("abc");
+        $regex->addPattern("ABC");
+        $this->assertTrue($regex->match("abcdef", $match));
+        $this->assertEqual($match, "abc");
+        $this->assertTrue($regex->match("AAABCabcdef", $match));
+        $this->assertEqual($match, "ABC");
+        $this->assertFalse($regex->match("Hello", $match));
+    }
+    
+    function testPatternLabels() {
+        $regex = &new ParallelRegex(false);
+        $regex->addPattern("abc", "letter");
+        $regex->addPattern("123", "number");
+        $this->assertIdentical($regex->match("abcdef", $match), "letter");
+        $this->assertEqual($match, "abc");
+        $this->assertIdentical($regex->match("0123456789", $match), "number");
+        $this->assertEqual($match, "123");
+    }
+}
+
+class TestOfStateStack extends UnitTestCase {
+    
+    function testStartState() {
+        $stack = &new SimpleStateStack("one");
+        $this->assertEqual($stack->getCurrent(), "one");
+    }
+    
+    function testExhaustion() {
+        $stack = &new SimpleStateStack("one");
+        $this->assertFalse($stack->leave());
+    }
+    
+    function testStateMoves() {
+        $stack = &new SimpleStateStack("one");
+        $stack->enter("two");
+        $this->assertEqual($stack->getCurrent(), "two");
+        $stack->enter("three");
+        $this->assertEqual($stack->getCurrent(), "three");
+        $this->assertTrue($stack->leave());
+        $this->assertEqual($stack->getCurrent(), "two");
+        $stack->enter("third");
+        $this->assertEqual($stack->getCurrent(), "third");
+        $this->assertTrue($stack->leave());
+        $this->assertTrue($stack->leave());
+        $this->assertEqual($stack->getCurrent(), "one");
+    }
+}
+
+class TestParser {
+    
+    function accept() {
+    }
+    
+    function a() {
+    }
+    
+    function b() {
+    }
+}
+Mock::generate('TestParser');
+
+class TestOfLexer extends UnitTestCase {
+    
+    function testEmptyPage() {
+        $handler = &new MockTestParser();
+        $handler->expectNever("accept");
+        $handler->setReturnValue("accept", true);
+        $handler->expectNever("accept");
+        $handler->setReturnValue("accept", true);
+        $lexer = &new SimpleLexer($handler);
+        $lexer->addPattern("a+");
+        $this->assertTrue($lexer->parse(""));
+    }
+    
+    function testSinglePattern() {
+        $handler = &new MockTestParser();
+        $handler->expectArgumentsAt(0, "accept", array("aaa", LEXER_MATCHED));
+        $handler->expectArgumentsAt(1, "accept", array("x", LEXER_UNMATCHED));
+        $handler->expectArgumentsAt(2, "accept", array("a", LEXER_MATCHED));
+        $handler->expectArgumentsAt(3, "accept", array("yyy", LEXER_UNMATCHED));
+        $handler->expectArgumentsAt(4, "accept", array("a", LEXER_MATCHED));
+        $handler->expectArgumentsAt(5, "accept", array("x", LEXER_UNMATCHED));
+        $handler->expectArgumentsAt(6, "accept", array("aaa", LEXER_MATCHED));
+        $handler->expectArgumentsAt(7, "accept", array("z", LEXER_UNMATCHED));
+        $handler->expectCallCount("accept", 8);
+        $handler->setReturnValue("accept", true);
+        $lexer = &new SimpleLexer($handler);
+        $lexer->addPattern("a+");
+        $this->assertTrue($lexer->parse("aaaxayyyaxaaaz"));
+    }
+    
+    function testMultiplePattern() {
+        $handler = &new MockTestParser();
+        $target = array("a", "b", "a", "bb", "x", "b", "a", "xxxxxx", "a", "x");
+        for ($i = 0; $i < count($target); $i++) {
+            $handler->expectArgumentsAt($i, "accept", array($target[$i], '*'));
+        }
+        $handler->expectCallCount("accept", count($target));
+        $handler->setReturnValue("accept", true);
+        $lexer = &new SimpleLexer($handler);
+        $lexer->addPattern("a+");
+        $lexer->addPattern("b+");
+        $this->assertTrue($lexer->parse("ababbxbaxxxxxxax"));
+    }
+}
+
+class TestOfLexerModes extends UnitTestCase {
+    
+    function testIsolatedPattern() {
+        $handler = &new MockTestParser();
+        $handler->expectArgumentsAt(0, "a", array("a", LEXER_MATCHED));
+        $handler->expectArgumentsAt(1, "a", array("b", LEXER_UNMATCHED));
+        $handler->expectArgumentsAt(2, "a", array("aa", LEXER_MATCHED));
+        $handler->expectArgumentsAt(3, "a", array("bxb", LEXER_UNMATCHED));
+        $handler->expectArgumentsAt(4, "a", array("aaa", LEXER_MATCHED));
+        $handler->expectArgumentsAt(5, "a", array("x", LEXER_UNMATCHED));
+        $handler->expectArgumentsAt(6, "a", array("aaaa", LEXER_MATCHED));
+        $handler->expectArgumentsAt(7, "a", array("x", LEXER_UNMATCHED));
+        $handler->expectCallCount("a", 8);
+        $handler->setReturnValue("a", true);
+        $lexer = &new SimpleLexer($handler, "a");
+        $lexer->addPattern("a+", "a");
+        $lexer->addPattern("b+", "b");
+        $this->assertTrue($lexer->parse("abaabxbaaaxaaaax"));
+    }
+    
+    function testModeChange() {
+        $handler = &new MockTestParser();
+        $handler->expectArgumentsAt(0, "a", array("a", LEXER_MATCHED));
+        $handler->expectArgumentsAt(1, "a", array("b", LEXER_UNMATCHED));
+        $handler->expectArgumentsAt(2, "a", array("aa", LEXER_MATCHED));
+        $handler->expectArgumentsAt(3, "a", array("b", LEXER_UNMATCHED));
+        $handler->expectArgumentsAt(4, "a", array("aaa", LEXER_MATCHED));
+        $handler->expectArgumentsAt(0, "b", array(":", LEXER_ENTER));
+        $handler->expectArgumentsAt(1, "b", array("a", LEXER_UNMATCHED));
+        $handler->expectArgumentsAt(2, "b", array("b", LEXER_MATCHED));
+        $handler->expectArgumentsAt(3, "b", array("a", LEXER_UNMATCHED));
+        $handler->expectArgumentsAt(4, "b", array("bb", LEXER_MATCHED));
+        $handler->expectArgumentsAt(5, "b", array("a", LEXER_UNMATCHED));
+        $handler->expectArgumentsAt(6, "b", array("bbb", LEXER_MATCHED));
+        $handler->expectArgumentsAt(7, "b", array("a", LEXER_UNMATCHED));
+        $handler->expectCallCount("a", 5);
+        $handler->expectCallCount("b", 8);
+        $handler->setReturnValue("a", true);
+        $handler->setReturnValue("b", true);
+        $lexer = &new SimpleLexer($handler, "a");
+        $lexer->addPattern("a+", "a");
+        $lexer->addEntryPattern(":", "a", "b");
+        $lexer->addPattern("b+", "b");
+        $this->assertTrue($lexer->parse("abaabaaa:ababbabbba"));
+    }
+    
+    function testNesting() {
+        $handler = &new MockTestParser();
+        $handler->setReturnValue("a", true);
+        $handler->setReturnValue("b", true);
+        $handler->expectArgumentsAt(0, "a", array("aa", LEXER_MATCHED));
+        $handler->expectArgumentsAt(1, "a", array("b", LEXER_UNMATCHED));
+        $handler->expectArgumentsAt(2, "a", array("aa", LEXER_MATCHED));
+        $handler->expectArgumentsAt(3, "a", array("b", LEXER_UNMATCHED));
+        $handler->expectArgumentsAt(0, "b", array("(", LEXER_ENTER));
+        $handler->expectArgumentsAt(1, "b", array("bb", LEXER_MATCHED));
+        $handler->expectArgumentsAt(2, "b", array("a", LEXER_UNMATCHED));
+        $handler->expectArgumentsAt(3, "b", array("bb", LEXER_MATCHED));
+        $handler->expectArgumentsAt(4, "b", array(")", LEXER_EXIT));
+        $handler->expectArgumentsAt(4, "a", array("aa", LEXER_MATCHED));
+        $handler->expectArgumentsAt(5, "a", array("b", LEXER_UNMATCHED));
+        $handler->expectCallCount("a", 6);
+        $handler->expectCallCount("b", 5);
+        $lexer = &new SimpleLexer($handler, "a");
+        $lexer->addPattern("a+", "a");
+        $lexer->addEntryPattern("(", "a", "b");
+        $lexer->addPattern("b+", "b");
+        $lexer->addExitPattern(")", "b");
+        $this->assertTrue($lexer->parse("aabaab(bbabb)aab"));
+    }
+    
+    function testSingular() {
+        $handler = &new MockTestParser();
+        $handler->setReturnValue("a", true);
+        $handler->setReturnValue("b", true);
+        $handler->expectArgumentsAt(0, "a", array("aa", LEXER_MATCHED));
+        $handler->expectArgumentsAt(1, "a", array("aa", LEXER_MATCHED));
+        $handler->expectArgumentsAt(2, "a", array("xx", LEXER_UNMATCHED));
+        $handler->expectArgumentsAt(3, "a", array("xx", LEXER_UNMATCHED));
+        $handler->expectArgumentsAt(0, "b", array("b", LEXER_SPECIAL));
+        $handler->expectArgumentsAt(1, "b", array("bbb", LEXER_SPECIAL));
+        $handler->expectCallCount("a", 4);
+        $handler->expectCallCount("b", 2);
+        $lexer = &new SimpleLexer($handler, "a");
+        $lexer->addPattern("a+", "a");
+        $lexer->addSpecialPattern("b+", "a", "b");
+        $this->assertTrue($lexer->parse("aabaaxxbbbxx"));
+    }
+    
+    function testUnwindTooFar() {
+        $handler = &new MockTestParser();
+        $handler->setReturnValue("a", true);
+        $handler->expectArgumentsAt(0, "a", array("aa", LEXER_MATCHED));
+        $handler->expectArgumentsAt(1, "a", array(")", LEXER_EXIT));
+        $handler->expectCallCount("a", 2);
+        $lexer = &new SimpleLexer($handler, "a");
+        $lexer->addPattern("a+", "a");
+        $lexer->addExitPattern(")", "a");
+        $this->assertFalse($lexer->parse("aa)aa"));
+    }
+}
+
+class TestOfLexerHandlers extends UnitTestCase {
+    
+    function testModeMapping() {
+        $handler = &new MockTestParser();
+        $handler->setReturnValue("a", true);
+        $handler->expectArgumentsAt(0, "a", array("aa", LEXER_MATCHED));
+        $handler->expectArgumentsAt(1, "a", array("(", LEXER_ENTER));
+        $handler->expectArgumentsAt(2, "a", array("bb", LEXER_MATCHED));
+        $handler->expectArgumentsAt(3, "a", array("a", LEXER_UNMATCHED));
+        $handler->expectArgumentsAt(4, "a", array("bb", LEXER_MATCHED));
+        $handler->expectArgumentsAt(5, "a", array(")", LEXER_EXIT));
+        $handler->expectArgumentsAt(6, "a", array("b", LEXER_UNMATCHED));
+        $handler->expectCallCount("a", 7);
+        $lexer = &new SimpleLexer($handler, "mode_a");
+        $lexer->addPattern("a+", "mode_a");
+        $lexer->addEntryPattern("(", "mode_a", "mode_b");
+        $lexer->addPattern("b+", "mode_b");
+        $lexer->addExitPattern(")", "mode_b");
+        $lexer->mapHandler("mode_a", "a");
+        $lexer->mapHandler("mode_b", "a");
+        $this->assertTrue($lexer->parse("aa(bbabb)b"));
+    }
+}
+
+class TestOfSimpleHtmlLexer extends UnitTestCase {
+    
+    function &createParser() {
+        $parser = &new MockSimpleHtmlSaxParser();
+        $parser->setReturnValue('acceptStartToken', true);
+        $parser->setReturnValue('acceptEndToken', true);
+        $parser->setReturnValue('acceptAttributeToken', true);
+        $parser->setReturnValue('acceptEntityToken', true);
+        $parser->setReturnValue('acceptTextToken', true);
+        $parser->setReturnValue('ignore', true);
+        return $parser;
+    }
+    
+    function testNoContent() {
+        $parser = &$this->createParser();
+        $parser->expectNever('acceptStartToken');
+        $parser->expectNever('acceptEndToken');
+        $parser->expectNever('acceptAttributeToken');
+        $parser->expectNever('acceptEntityToken');
+        $parser->expectNever('acceptTextToken');
+        $lexer = &new SimpleHtmlLexer($parser);
+        $this->assertTrue($lexer->parse(''));
+    }
+    
+    function testUninteresting() {
+        $parser = &$this->createParser();
+        $parser->expectOnce('acceptTextToken', array('<html></html>', '*'));
+        $lexer = &new SimpleHtmlLexer($parser);
+        $this->assertTrue($lexer->parse('<html></html>'));
+    }
+    
+    function testSkipCss() {
+        $parser = &$this->createParser();
+        $parser->expectNever('acceptTextToken');
+        $parser->expectAtLeastOnce('ignore');
+        $lexer = &new SimpleHtmlLexer($parser);
+        $this->assertTrue($lexer->parse("<style>Lot's of styles</style>"));
+    }
+    
+    function testSkipJavaScript() {
+        $parser = &$this->createParser();
+        $parser->expectNever('acceptTextToken');
+        $parser->expectAtLeastOnce('ignore');
+        $lexer = &new SimpleHtmlLexer($parser);
+        $this->assertTrue($lexer->parse("<SCRIPT>Javascript code {';:^%^%£$'@\"*(}</SCRIPT>"));
+    }
+    
+    function testSkipHtmlComments() {
+        $parser = &$this->createParser();
+        $parser->expectNever('acceptTextToken');
+        $parser->expectAtLeastOnce('ignore');
+        $lexer = &new SimpleHtmlLexer($parser);
+        $this->assertTrue($lexer->parse("<!-- <title>title</title><style>styles</style> -->"));
+    }
+    
+    function testTagWithNoAttributes() {
+        $parser = &$this->createParser();
+        $parser->expectAt(0, 'acceptStartToken', array('<title', '*'));
+        $parser->expectAt(1, 'acceptStartToken', array('>', '*'));
+        $parser->expectCallCount('acceptStartToken', 2);
+        $parser->expectOnce('acceptTextToken', array('Hello', '*'));
+        $parser->expectOnce('acceptEndToken', array('</title>', '*'));
+        $lexer = &new SimpleHtmlLexer($parser);
+        $this->assertTrue($lexer->parse('<title>Hello</title>'));
+    }
+    
+    function testTagWithAttributes() {
+        $parser = &$this->createParser();
+        $parser->expectOnce('acceptTextToken', array('label', '*'));
+        $parser->expectAt(0, 'acceptStartToken', array('<a', '*'));
+        $parser->expectAt(1, 'acceptStartToken', array('href', '*'));
+        $parser->expectAt(2, 'acceptStartToken', array('>', '*'));
+        $parser->expectCallCount('acceptStartToken', 3);
+        $parser->expectAt(0, 'acceptAttributeToken', array('= "', '*'));
+        $parser->expectAt(1, 'acceptAttributeToken', array('here.html', '*'));
+        $parser->expectAt(2, 'acceptAttributeToken', array('"', '*'));
+        $parser->expectCallCount('acceptAttributeToken', 3);
+        $parser->expectOnce('acceptEndToken', array('</a>', '*'));
+        $lexer = &new SimpleHtmlLexer($parser);
+        $this->assertTrue($lexer->parse('<a href = "here.html">label</a>'));
+    }
+}
+
+class TestOfHtmlSaxParser extends UnitTestCase {
+    
+    function &createListener() {
+        $listener = &new MockSimpleSaxListener();
+        $listener->setReturnValue('startElement', true);
+        $listener->setReturnValue('addContent', true);
+        $listener->setReturnValue('endElement', true);
+        return $listener;
+    }
+    
+    function testFramesetTag() {
+        $listener = &$this->createListener();
+        $listener->expectOnce('startElement', array('frameset', array()));
+        $listener->expectOnce('addContent', array('Frames'));
+        $listener->expectOnce('endElement', array('frameset'));
+        $parser = &new SimpleHtmlSaxParser($listener);
+        $this->assertTrue($parser->parse('<frameset>Frames</frameset>'));
+    }
+    
+    function testTagWithUnquotedAttributes() {
+        $listener = &$this->createListener();
+        $listener->expectOnce(
+                'startElement',
+                array('input', array('name' => 'a.b.c', 'value' => 'd')));
+        $parser = &new SimpleHtmlSaxParser($listener);
+        $this->assertTrue($parser->parse('<input name=a.b.c value = d>'));
+    }
+    
+    function testTagInsideContent() {
+        $listener = &$this->createListener();
+        $listener->expectOnce('startElement', array('a', array()));
+        $listener->expectAt(0, 'addContent', array('<html>'));
+        $listener->expectAt(1, 'addContent', array('</html>'));
+        $parser = &new SimpleHtmlSaxParser($listener);
+        $this->assertTrue($parser->parse('<html><a></a></html>'));
+    }
+    
+    function testTagWithInternalContent() {
+        $listener = &$this->createListener();
+        $listener->expectOnce('startElement', array('a', array()));
+        $listener->expectOnce('addContent', array('label'));
+        $listener->expectOnce('endElement', array('a'));
+        $parser = &new SimpleHtmlSaxParser($listener);
+        $this->assertTrue($parser->parse('<a>label</a>'));
+    }
+    
+    function testLinkAddress() {
+        $listener = &$this->createListener();
+        $listener->expectOnce('startElement', array('a', array('href' => 'here.html')));
+        $listener->expectOnce('addContent', array('label'));
+        $listener->expectOnce('endElement', array('a'));
+        $parser = &new SimpleHtmlSaxParser($listener);
+        $this->assertTrue($parser->parse("<a href = 'here.html'>label</a>"));
+    }
+    
+    function testEncodedAttribute() {
+        $listener = &$this->createListener();
+        $listener->expectOnce('startElement', array('a', array('href' => 'here&there.html')));
+        $listener->expectOnce('addContent', array('label'));
+        $listener->expectOnce('endElement', array('a'));
+        $parser = &new SimpleHtmlSaxParser($listener);
+        $this->assertTrue($parser->parse("<a href = 'here&amp;there.html'>label</a>"));
+    }
+    
+    function testTagWithId() {
+        $listener = &$this->createListener();
+        $listener->expectOnce('startElement', array('a', array('id' => '0')));
+        $listener->expectOnce('addContent', array('label'));
+        $listener->expectOnce('endElement', array('a'));
+        $parser = &new SimpleHtmlSaxParser($listener);
+        $this->assertTrue($parser->parse('<a id="0">label</a>'));
+    }
+     
+    function testTagWithEmptyAttributes() {
+        $listener = &$this->createListener();
+        $listener->expectOnce(
+                'startElement',
+                array('option', array('value' => '', 'selected' => '')));
+        $listener->expectOnce('addContent', array('label'));
+        $listener->expectOnce('endElement', array('option'));
+        $parser = &new SimpleHtmlSaxParser($listener);
+        $this->assertTrue($parser->parse('<option value="" selected>label</option>'));
+    }
+   
+    function testComplexTagWithLotsOfCaseVariations() {
+        $listener = &$this->createListener();
+        $listener->expectOnce(
+                'startElement',
+                array('a', array('href' => 'here.html', 'style' => "'cool'")));
+        $listener->expectOnce('addContent', array('label'));
+        $listener->expectOnce('endElement', array('a'));
+        $parser = &new SimpleHtmlSaxParser($listener);
+        $this->assertTrue($parser->parse('<A HREF = \'here.html\' Style="\'cool\'">label</A>'));
+    }
+    
+    function testXhtmlSelfClosingTag() {
+        $listener = &$this->createListener();
+        $listener->expectOnce(
+                'startElement',
+                array('input', array('type' => 'submit', 'name' => 'N', 'value' => 'V')));
+        $parser = &new SimpleHtmlSaxParser($listener);
+        $this->assertTrue($parser->parse('<input type="submit" name="N" value="V" />'));
+    }
+    
+    function testNestedFrameInFrameset() {
+        $listener = &$this->createListener();
+        $listener->expectAt(0, 'startElement', array('frameset', array()));
+        $listener->expectAt(1, 'startElement', array('frame', array('src' => 'frame.html')));
+        $listener->expectCallCount('startElement', 2);
+        $listener->expectOnce('addContent', array('<noframes>Hello</noframes>'));
+        $listener->expectOnce('endElement', array('frameset'));
+        $parser = &new SimpleHtmlSaxParser($listener);
+        $this->assertTrue($parser->parse(
+                '<frameset><frame src="frame.html"><noframes>Hello</noframes></frameset>'));
+    }
+}
+
+class TestOfTextExtraction extends UnitTestCase {
+    
+	function testImageSuppressionWhileKeepingParagraphsAndAltText() {
+        $this->assertEqual(
+                SimpleHtmlSaxParser::normalise('<img src="foo.png" /><p>some text</p><img src="bar.png" alt="bar" />'),
+                'some text bar');
+		
+	}
+
+    function testSpaceNormalisation() {
+        $this->assertEqual(
+                SimpleHtmlSaxParser::normalise("\nOne\tTwo   \nThree\t"),
+                'One Two Three');
+    }
+    
+    function testMultilinesCommentSuppression() {
+        $this->assertEqual(
+                SimpleHtmlSaxParser::normalise('<!--\n Hello \n-->'),
+                '');
+    }
+    
+    function testCommentSuppression() {
+        $this->assertEqual(
+                SimpleHtmlSaxParser::normalise('<!--Hello-->'),
+                '');
+    }
+    
+    function testJavascriptSuppression() {
+        $this->assertEqual(
+                SimpleHtmlSaxParser::normalise('<script attribute="test">\nHello\n</script>'),
+                '');
+        $this->assertEqual(
+                SimpleHtmlSaxParser::normalise('<script attribute="test">Hello</script>'),
+                '');
+        $this->assertEqual(
+                SimpleHtmlSaxParser::normalise('<script>Hello</script>'),
+                '');
+    }
+    
+    function testTagSuppression() {
+        $this->assertEqual(
+                SimpleHtmlSaxParser::normalise('<b>Hello</b>'),
+                'Hello');
+    }
+    
+    function testAdjoiningTagSuppression() {
+        $this->assertEqual(
+                SimpleHtmlSaxParser::normalise('<b>Hello</b><em>Goodbye</em>'),
+                'HelloGoodbye');
+    }
+    
+    function testExtractImageAltTextWithDifferentQuotes() {
+        $this->assertEqual(
+                SimpleHtmlSaxParser::normalise('<img alt="One"><img alt=\'Two\'><img alt=Three>'),
+                'One Two Three');
+    }
+    
+    function testExtractImageAltTextMultipleTimes() {
+        $this->assertEqual(
+                SimpleHtmlSaxParser::normalise('<img alt="One"><img alt="Two"><img alt="Three">'),
+                'One Two Three');
+    }
+    
+    function testHtmlEntityTranslation() {
+        $this->assertEqual(
+                SimpleHtmlSaxParser::normalise('&lt;&gt;&quot;&amp;&#039;'),
+                '<>"&\'');
+    }
+}
+?>
\ No newline at end of file