$options * @param ConverterInterface[] $converters */ private function assertHtmlGivesMarkdown(string $html, string $expectedMarkdown, array $options = [], array $converters = []): void { $markdown = new HtmlConverter($options); foreach ($converters as $converter) { $markdown->getEnvironment()->addConverter($converter); } $result = $markdown->convert($html); $this->assertSame($expectedMarkdown, $result); } public function testEmptyInput(): void { $this->assertHtmlGivesMarkdown('', ''); $this->assertHtmlGivesMarkdown(' ', ''); } public function testPlainText(): void { $this->assertHtmlGivesMarkdown('test', 'test'); $this->assertHtmlGivesMarkdown('

test

', 'test'); //expected result is in the comment for better readability $this->assertHtmlGivesMarkdown('

*test*

', '\\*test\\*'); // \*test\* $this->assertHtmlGivesMarkdown('

_test_

', '\\_test\\_'); // \_test\_ $this->assertHtmlGivesMarkdown('

\\*test\\*

', '\\\\\\*test\\\\\\*'); // \\\*test\\\* $this->assertHtmlGivesMarkdown('

test[test]

', 'test\\[test\\]'); // test\[test\] // Markdown-like syntax in
text should be preserved as-is - no escaping $this->assertHtmlGivesMarkdown('
_test_
', '
_test_
'); $this->assertHtmlGivesMarkdown('
*test*
', '
*test*
'); $this->assertHtmlGivesMarkdown('

\ ` * _ { } [ ] ( ) > > # + - . !

', '\\\\ ` \* \_ { } \[ \] ( ) > > # + - . !'); } public function testLineBreaks(): void { $this->assertHtmlGivesMarkdown("test\nanother line", 'test another line'); $this->assertHtmlGivesMarkdown("

test\nanother line

", 'test another line'); $this->assertHtmlGivesMarkdown("

test
\nanother line

", "test \nanother line"); $this->assertHtmlGivesMarkdown("

test
\n another line

", "test \n another line"); $this->assertHtmlGivesMarkdown("

test
\nanother line

", "test \n*another* line"); $this->assertHtmlGivesMarkdown('

test
another line

', "test \nanother line"); $this->assertHtmlGivesMarkdown('

test
another line

', "test \nanother line"); $this->assertHtmlGivesMarkdown('

test
another line

', "test \nanother line"); $this->assertHtmlGivesMarkdown('

test
another line

', "test \nanother line"); $this->assertHtmlGivesMarkdown('

test
another line

', "test\nanother line", ['hard_break' => true]); $this->assertHtmlGivesMarkdown('

test
another line

', "test\nanother line", ['hard_break' => true]); $this->assertHtmlGivesMarkdown('

test
another line

', "test\nanother line", ['hard_break' => true]); $this->assertHtmlGivesMarkdown('

test
another line

', "test\nanother line", ['hard_break' => true]); $this->assertHtmlGivesMarkdown('

foo

bar

baz

', "foo\n\n
bar
\n\nbaz"); } public function testHeaders(): void { $this->assertHtmlGivesMarkdown('

Test

', "Test\n===="); $this->assertHtmlGivesMarkdown('

Test

', "Test\n----"); $this->assertHtmlGivesMarkdown('

Test

', '> # Test'); $this->assertHtmlGivesMarkdown('

Test

', '> ## Test'); $this->assertHtmlGivesMarkdown('

Test

', '### Test'); $this->assertHtmlGivesMarkdown('

Test

', '#### Test'); $this->assertHtmlGivesMarkdown('
Test
', '##### Test'); $this->assertHtmlGivesMarkdown('
Test
', '###### Test'); $this->assertHtmlGivesMarkdown('

', ''); $this->assertHtmlGivesMarkdown('

', ''); $this->assertHtmlGivesMarkdown('

', ''); $this->assertHtmlGivesMarkdown('

# Test

', "\# Test\n======="); $this->assertHtmlGivesMarkdown('

# Test #

', "\# Test #\n========="); $this->assertHtmlGivesMarkdown('

Mismatched Tags

', '### Mismatched Tags'); } public function testSpans(): void { $this->assertHtmlGivesMarkdown('Test', '*Test*'); $this->assertHtmlGivesMarkdown('Test', '*Test*'); $this->assertHtmlGivesMarkdown('Test', '**Test**'); $this->assertHtmlGivesMarkdown('Test', '**Test**'); $this->assertHtmlGivesMarkdown('Test', '*Test*', ['italic_style' => '*']); $this->assertHtmlGivesMarkdown('Italic and a bold', '*Italic* and a __bold__', ['italic_style' => '*', 'bold_style' => '__']); $this->assertHtmlGivesMarkdown('Test', '_Test_', ['italic_style' => '_']); $this->assertHtmlGivesMarkdown('Test', '__Test__', ['bold_style' => '__']); $this->assertHtmlGivesMarkdown('Test', '__Test__', ['bold_style' => '__']); $this->assertHtmlGivesMarkdown('Test', 'Test'); $this->assertHtmlGivesMarkdown('Bold Italic', '**Bold** *Italic*'); $this->assertHtmlGivesMarkdown('BoldItalic', '**Bold***Italic*'); $this->assertHtmlGivesMarkdown('This is a test', '*This is **a test***'); $this->assertHtmlGivesMarkdown('This is a test', '*This is* **a** test'); $this->assertHtmlGivesMarkdown('Emphasis with no text preserves spaces.', 'Emphasis with no text **preserves** spaces.'); $this->assertHtmlGivesMarkdown("Emphasis discards \nline breaks", 'Emphasis discards line breaks'); $this->assertHtmlGivesMarkdown('Emphasis preserves
HTML breaks', "Emphasis preserves \nHTML breaks"); } public function testConsecutiveSpans(): void { $this->assertHtmlGivesMarkdown('FooBar', '*FooBar*'); $this->assertHtmlGivesMarkdown('FooBar', '*FooBar*'); $this->assertHtmlGivesMarkdown('FooBarFoo', '*FooBarFoo*'); $this->assertHtmlGivesMarkdown('FooBar', '**FooBar**'); $this->assertHtmlGivesMarkdown('FooBar', '**FooBar**'); $this->assertHtmlGivesMarkdown('FooBarFoo', '**FooBarFoo**'); $this->assertHtmlGivesMarkdown('Foo Bar', '*Foo* *Bar*'); $this->assertHtmlGivesMarkdown('Foo Bar', '**Foo** **Bar**'); $this->assertHtmlGivesMarkdown('FooBarFoo', '**FooBar***Foo*'); } public function testNesting(): void { $this->assertHtmlGivesMarkdown('Test', 'Test'); } public function testScript(): void { $this->assertHtmlGivesMarkdown("", ""); } public function testImage(): void { $this->assertHtmlGivesMarkdown('alt text', '![alt text](/path/img.jpg "Title")'); } public function testAnchor(): void { $this->assertHtmlGivesMarkdown('http://modernnerd.net', ''); $this->assertHtmlGivesMarkdown('Modern Nerd', '[Modern Nerd](http://modernnerd.net "Title")'); $this->assertHtmlGivesMarkdown('Modern Nerd Modern Nerd', '[Modern Nerd](http://modernnerd.net "Title") [Modern Nerd](http://modernnerd.net "Title")'); $this->assertHtmlGivesMarkdown('

Modern Nerd

', '[### Modern Nerd](http://modernnerd.net)'); $this->assertHtmlGivesMarkdown('The Modern Nerd (MN)', 'The [Modern Nerd ](http://modernnerd.net)(MN)'); $this->assertHtmlGivesMarkdown('alt text', '[![alt text](/path/img.jpg "Title")](http://modernnerd.net/ "Title")'); $this->assertHtmlGivesMarkdown('alt text Test', '[![alt text](/path/img.jpg "Title") Test](http://modernnerd.net/ "Title")'); // Placeholder links and fragment identifiers $this->assertHtmlGivesMarkdown('Test', 'Test'); $this->assertHtmlGivesMarkdown('Test', 'Test'); $this->assertHtmlGivesMarkdown('Test', '[Test](#nerd "Title")'); $this->assertHtmlGivesMarkdown('Test', '[Test](#nerd)'); // Strip placeholder links $this->assertHtmlGivesMarkdown('Test', 'Test', ['strip_placeholder_links' => true]); $this->assertHtmlGivesMarkdown('Test', 'Test', ['strip_placeholder_links' => true]); $this->assertHtmlGivesMarkdown('Test', '[Test](#nerd "Title")', ['strip_placeholder_links' => true]); $this->assertHtmlGivesMarkdown('Test', '[Test](#nerd)', ['strip_placeholder_links' => true]); // Autolinking $this->assertHtmlGivesMarkdown('test', '[test](test)'); $this->assertHtmlGivesMarkdown('google.com', '[google.com](google.com)'); $this->assertHtmlGivesMarkdown('https://www.google.com', ''); $this->assertHtmlGivesMarkdown('ftp://files.example.com', ''); $this->assertHtmlGivesMarkdown('test@example.com', ''); $this->assertHtmlGivesMarkdown('test+foo@example.bar-baz.com', ''); // Autolinking can be toggled off $this->assertHtmlGivesMarkdown('https://www.google.com', '[https://www.google.com](https://www.google.com)', ['use_autolinks' => false]); $this->assertHtmlGivesMarkdown('Google', '[Google](https://www.google.com)', ['use_autolinks' => false]); $this->assertHtmlGivesMarkdown('google.com', '[google.com](google.com)', ['use_autolinks' => false]); } public function testHorizontalRule(): void { $this->assertHtmlGivesMarkdown('
', '---'); $this->assertHtmlGivesMarkdown('
', '---'); $this->assertHtmlGivesMarkdown('
', '---'); $this->assertHtmlGivesMarkdown('
', '---'); $this->assertHtmlGivesMarkdown('

Test

', "Test\n\n---"); } public function testLists(): void { $this->assertHtmlGivesMarkdown('
  • Item A
  • Item B
  • Item C
', "- Item A\n- Item B\n- Item C"); $this->assertHtmlGivesMarkdown('
  • Item A
  • Item B
', "- Item A\n- Item B"); $this->assertHtmlGivesMarkdown('

  • Item A

    Description

  • Item B
', "- ### Item A\n \n Description\n- Item B"); $this->assertHtmlGivesMarkdown('
  • First
  • Second
', "* First\n* Second", ['list_item_style' => '*']); $this->assertHtmlGivesMarkdown('
  1. Item A
  2. Item B
', "1. Item A\n2. Item B"); $this->assertHtmlGivesMarkdown("
    \n
  1. Item A
    2. \n
  2. Item B
    3. \n
", "1. Item A\n2. Item B"); $this->assertHtmlGivesMarkdown('
  1. Item A
  2. Item B
', "1. Item A\n2. Item B"); $this->assertHtmlGivesMarkdown('

  1. Item A

    Description

  2. Item B
', "1. ### Item A\n \n Description\n2. Item B"); $this->assertHtmlGivesMarkdown('
  1. Item A
  2. Item B
', "120. Item A\n121. Item B"); $this->assertHtmlGivesMarkdown('
  1. Item A
  2. Item B
', "0. Item A\n1. Item B"); $this->assertHtmlGivesMarkdown('
  • first item of first list
  • second item of first list
  • first item of second list
', "- first item of first list\n- second item of first list\n\n* first item of second list", ['list_item_style_alternate' => '*']); } public function testNestedLists(): void { $this->assertHtmlGivesMarkdown('
  • Item A
  • Item B
    • Nested A
    • Nested B
  • Item C
', "- Item A\n- Item B\n - Nested A\n - Nested B\n- Item C"); $this->assertHtmlGivesMarkdown('
  • Item A
    1. Nested A
  • Item B
', "- Item A\n 1. Nested A\n- Item B"); $this->assertHtmlGivesMarkdown('
  1. Item A
    • Nested A
  2. Item B
', "1. Item A\n - Nested A\n2. Item B"); } public function testComplexNestedLists(): void { $this->assertHtmlGivesMarkdown("
    \n
  • Item A
    • \n
  • Item B\n
      \n
    • Nested A
      • \n
    • Nested B\n
        \n
      • Subnested A
        • \n
      • Subnested B
        • \n
      \n
      • \n
    \n
    • \n
  • Item C
    • \n
", "- Item A\n- Item B \n - Nested A\n - Nested B \n - Subnested A\n - Subnested B\n- Item C"); $this->assertHtmlGivesMarkdown("
    \n
  • Item A
    • \n

  • Item B

    \n

    Paragraph Item B

    \n
      \n
    • Nested A
      • \n
    • Nested B\n
        \n
      • Subnested A
        • \n
      • Subnested B
        • \n
      \n
      • \n
    \n
    • \n
  • Item C
    • \n
", "* Item A\n* ## Item B\n \n Paragraph Item B\n \n \n * Nested A\n * Nested B \n * Subnested A\n * Subnested B\n* Item C", ['list_item_style' => '*', 'header_style' => 'atx']); $this->assertHtmlGivesMarkdown("
    \n
  • Item A
    • \n

  • Item B

    \n

    Paragraph Item B

    \n
      \n
    • Nested A
      • \n

    • Nested B

      \n

      Paragraph Nested B

      \n
        \n
      • Subnested A
        • \n
      • Subnested B\n
          \n
        • Subsubnested A
          • \n

        • Subsubnested B

          \n

          Paragraph Subsubnested B

          \n
            \n
          • Subsubsubnested A
            • \n
          • Subsubsubnested B
            • \n
          \n
          • \n
        \n
        • \n
      \n
      • \n
    \n
    • \n
  • Item C
    • \n
", "* Item A\n* ## Item B\n \n Paragraph Item B\n \n \n * Nested A\n * ## Nested B\n \n Paragraph Nested B\n \n \n * Subnested A\n * Subnested B \n * Subsubnested A\n * ## Subsubnested B\n \n Paragraph Subsubnested B\n \n \n * Subsubsubnested A\n * Subsubsubnested B\n* Item C", ['list_item_style' => '*', 'header_style' => 'atx']); $this->assertHtmlGivesMarkdown("
    \n
  • Item A
    • \n
  • Item B\n
      \n
    • Nested A
      • \n
    • Nested B\n
        \n
      • Subnested A
        • \n
      • Subnested B\n
          \n
        • Subsubnested A
          • \n
        • Subsubnested B \n
            \n
          • Subsubsubnested A
            • \n
          • Subsubsubnested B
            • \n
          \n
          • \n
        \n
        • \n
      \n
      • \n
    \n
    • \n
  • Item C
    • \n
", "* Item A\n* Item B \n * Nested A\n * Nested B \n * Subnested A\n * Subnested B \n * Subsubnested A\n * Subsubnested B \n * Subsubsubnested A\n * Subsubsubnested B\n* Item C", ['list_item_style' => '*', 'header_style' => 'atx']); } public function testListLikeThingsWhichArentLists(): void { $this->assertHtmlGivesMarkdown('

120.

', '120\.'); $this->assertHtmlGivesMarkdown('

120.

', '120\.'); $this->assertHtmlGivesMarkdown('

120.00

', '120.00'); $this->assertHtmlGivesMarkdown('

120.00 USD

', '120.00 USD'); } public function testTables(): void { $opt = []; $conv = [new TableConverter()]; $this->assertHtmlGivesMarkdown('
A
', "| A |\n|---|", $opt, $conv); $this->assertHtmlGivesMarkdown('
A
', "| A |\n|---|", $opt, $conv); $this->assertHtmlGivesMarkdown('
AB
ab
cd
', "| A | B |\n|---|---|\n| a | b |\n| c | d |", $opt, $conv); $this->assertHtmlGivesMarkdown('
AB
afoo
', "| A | B |\n|---|---|\n| a | `foo` |", $opt, $conv); $this->assertHtmlGivesMarkdown('
AB
afoobar
', "| A | B |\n|---|---|\n| a | *foo*bar |", $opt, $conv); $this->assertHtmlGivesMarkdown('
AB
a

foo

bar
', "| A | B |\n|---|---|\n| a | foo bar |", $opt, $conv); $this->assertHtmlGivesMarkdown('
link
', "| [link](http://example.com) |\n|---|", $opt, $conv); $this->assertHtmlGivesMarkdown('
A
a | b
', "| A |\n|---|\n| a \\| b |", $opt, $conv); $this->assertHtmlGivesMarkdown('
A
a | b
', "| A |\n|---|\n| a ][ b |", ['table_pipe_escape' => ']['], $conv); $this->assertHtmlGivesMarkdown('
Cap
A
', "Cap\n| A |\n|---|", ['table_caption_side' => 'top'], $conv); $this->assertHtmlGivesMarkdown('
Cap
A
', "| A |\n|---|\nCap", ['table_caption_side' => 'bottom'], $conv); $this->assertHtmlGivesMarkdown('
Cap
A
', "| A |\n|---|", ['table_caption_side' => null], $conv); $this->assertHtmlGivesMarkdown('
A
', "| A |\n|:--|", $opt, $conv); $this->assertHtmlGivesMarkdown('
A
', "| A |\n|--:|", $opt, $conv); $this->assertHtmlGivesMarkdown('
A
', "| A |\n|:-:|", $opt, $conv); $this->assertHtmlGivesMarkdown('
A
', "| A |\n|---|", $opt, $conv); $html = <<<'EOT'
Batman Robin The Flash Kid Flash
Skill Smarts Dex, acrobat Super speed Super speed
EOT; $this->assertHtmlGivesMarkdown($html, "| | Batman | Robin | The Flash | Kid Flash |\n|---|---|---|---|---|\n| Skill | Smarts | Dex, acrobat | Super speed | Super speed |", $opt, $conv); } public function testCodeSamples(): void { $this->assertHtmlGivesMarkdown('<p>Some sample HTML</p>', '`

Some sample HTML

`'); $this->assertHtmlGivesMarkdown("\n<p>Some sample HTML</p>\n<p>And another line</p>\n", '`

Some sample HTML

And another line

`'); $this->assertHtmlGivesMarkdown('`', '```'); $this->assertHtmlGivesMarkdown('test', '`test`'); $this->assertHtmlGivesMarkdown('test `` test', '`test `` test`'); $this->assertHtmlGivesMarkdown('test` `test', "```\ntest` `test\n```"); $this->assertHtmlGivesMarkdown("

\n<p>Some sample HTML</p>\n<p>And another line</p>\n

Paragraph after code.

", "`

Some sample HTML

And another line

`\n\nParagraph after code."); $this->assertHtmlGivesMarkdown("

\n#sidebar h1 {\n font-size: 1.5em;\n font-weight: bold;\n}\n

", '`#sidebar h1 { font-size: 1.5em; font-weight: bold;}`'); $this->assertHtmlGivesMarkdown("

#sidebar h1 {\n font-size: 1.5em;\n font-weight: bold;\n}\n

", '`#sidebar h1 { font-size: 1.5em; font-weight: bold;}`'); $this->assertHtmlGivesMarkdown('
<p>Some sample HTML</p>
', "```\n

Some sample HTML

\n```"); $this->assertHtmlGivesMarkdown('
<?php //Some php code ?>
', "```php\n\n```"); $this->assertHtmlGivesMarkdown("
<?php //Some multiline php code\n\$myVar = 2; ?>
", "```php\n\n```"); $this->assertHtmlGivesMarkdown("
<p>Multiline HTML</p>\n<p>Here's the second line</p>
", "```\n

Multiline HTML

\n

Here's the second line

\n```"); $this->assertHtmlGivesMarkdown("
<p>Multiline HTML</p>\n<p>Here's the second line</p>
\n

line

", "```\n

Multiline HTML

\n

Here's the second line

\n```\n\nline"); } public function testPreformat(): void { $this->assertHtmlGivesMarkdown("
test\ntest\r\ntest
", "```\ntest\ntest\ntest\n```"); $this->assertHtmlGivesMarkdown("
test\ntest\r\ntest\n
", "```\ntest\ntest\ntest\n```"); $this->assertHtmlGivesMarkdown("
test\n\ttab\r\n
", "```\ntest\n\ttab\n```"); $this->assertHtmlGivesMarkdown('
  one line with spaces
', "```\n one line with spaces \n```"); $this->assertHtmlGivesMarkdown('
', "```\n```");
        $this->assertHtmlGivesMarkdown('
', "```\n```\n\n```\n```");
        $this->assertHtmlGivesMarkdown("
\n
", "```\n\n```");
        $this->assertHtmlGivesMarkdown("
foo\n
", "```\nfoo\n```");
        $this->assertHtmlGivesMarkdown("
\nfoo
", "```\n\nfoo\n```");
        $this->assertHtmlGivesMarkdown("
\nfoo\n
", "```\n\nfoo\n```");
        $this->assertHtmlGivesMarkdown("
\n\n
", "```\n\n\n```");
        $this->assertHtmlGivesMarkdown("
\n\n\n
", "```\n\n\n\n```");
        $this->assertHtmlGivesMarkdown("
\n
\n
", "```\n\n```\n\n```\n\n```");
        $this->assertHtmlGivesMarkdown("
one\ntwo\r\nthree
\n
line
", "```\none\ntwo\nthree\n```\n\nline");
        $this->assertHtmlGivesMarkdown("
test with attributes
", "```\ntest with attributes\n```");
    }

    public function testBlockquotes(): void
    {
        $this->assertHtmlGivesMarkdown('
Something I said?
', '> Something I said?');
        $this->assertHtmlGivesMarkdown('
Something I said?
', '> > Something I said?');
        $this->assertHtmlGivesMarkdown('
Something I said?
Why, yes it was!
', "> Something I said?\n> \n> Why, yes it was!");
    }

    public function testMalformedHtml(): void
    {
        $this->assertHtmlGivesMarkdown('
Some sample HTML
', '`
Some sample HTML
`'); // Invalid HTML, but should still work
        $this->assertHtmlGivesMarkdown('Strong italic Regular text', '***Strong italic*** Regular text'); // Missing closing 
    }

    public function testHtml5TagsArePreserved(): void
    {
        $this->assertHtmlGivesMarkdown('
Some stuff
', '
Some stuff
');
    }

    public function testStripUnmarkdownable(): void
    {
        $this->assertHtmlGivesMarkdown('Span', 'Span', ['strip_tags' => true]);
    }

    public function testStripComments(): void
    {
        $this->assertHtmlGivesMarkdown('
Test
', 'Test');
        $this->assertHtmlGivesMarkdown('
Test
', 'Test');
        $this->assertHtmlGivesMarkdown('
Test
', 'Test', ['strip_tags' => true]);
        $this->assertHtmlGivesMarkdown('
Test
', 'Test', ['strip_tags' => true]);
    }

    public function testPreserveComments(): void
    {
        $this->assertHtmlGivesMarkdown('
Test
', "Test\n\n", ['preserve_comments' => ['more']]);
        $this->assertHtmlGivesMarkdown('
Test
', "Test\n\n", ['preserve_comments' => ['more']]);
        $this->assertHtmlGivesMarkdown('
Test
', "Test\n\n", ['preserve_comments' => true]);
    }

    public function testPreserveCommentOrder(): void
    {
        $this->assertHtmlGivesMarkdown('
Test
', "Test\n\n", ['preserve_comments' => true]);
    }

    public function testPreserveWhitespace(): void
    {
        $this->assertHtmlGivesMarkdown('google.com test', '[google.com](google.com) `test`');
    }

    public function testDeleteBlankP(): void
    {
        $this->assertHtmlGivesMarkdown('
', '');
        $this->assertHtmlGivesMarkdown('
', '', ['strip_tags' => true]);
    }

    public function testDivs(): void
    {
        $this->assertHtmlGivesMarkdown('
Hello
World
', '
Hello
World
');
        $this->assertHtmlGivesMarkdown('
Hello
World
', "Hello\n\nWorld", ['strip_tags' => true]);
        $this->assertHtmlGivesMarkdown("
Hello
\n
World
", "Hello\n\nWorld", ['strip_tags' => true]);
        $this->assertHtmlGivesMarkdown('
Paragraph
Hello
World
', "Paragraph\n\nHello\n\nWorld", ['strip_tags' => true]);
    }

    public function testRemoveNodes(): void
    {
        $this->assertHtmlGivesMarkdown('
Hello
World
', '', ['remove_nodes' => 'div']);
        $this->assertHtmlGivesMarkdown('
Hello
World', '', ['remove_nodes' => 'p span']);
    }

    public function testHtmlEntities(): void
    {
        $this->assertHtmlGivesMarkdown('
&euro;
', '&euro;');
        $this->assertHtmlGivesMarkdown('<p>Some sample HTML</p>', '`
Some sample HTML
`');
    }

    public function testSetOption(): void
    {
        $markdown = new HtmlConverter();
        $markdown->getConfig()->setOption('strip_tags', true);
        $result = $markdown->convert('Strip');

        $this->assertEquals('Strip', $result);
    }

    public function testInvoke(): void
    {
        $markdown = new HtmlConverter();
        $markdown->getConfig()->setOption('strip_tags', true);
        $result = $markdown('Strip');

        $this->assertEquals('Strip', $result);
    }

    public function testSanitization(): void
    {
        $html     = '
<script type = "text/javascript"> function startTimer() { var tim = window.setTimeout("hideMessage()", 5000) } </head> <body>
';
        $markdown = '```' . "\n" . '