SanitizerUnitTest.php
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SanitizerUnitTest.php
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	<?php

	namespace MediaWiki\Tests\Parser;

	use MediaWiki\Parser\Sanitizer;
	use MediaWikiUnitTestCase;
	use UtfNormal\Constants;

	/**
	* @group Sanitizer
	*/
	class SanitizerUnitTest extends MediaWikiUnitTestCase {

	/**
	* @dataProvider provideDecodeCharReferences
	* @covers \MediaWiki\Parser\Sanitizer::decodeCharReferences
	*/
	public function testDecodeCharReferences( string $expected, string $input ) {
	$this->assertSame( $expected, Sanitizer::decodeCharReferences( $input ) );
	}

	public static function provideDecodeCharReferences() {
	return [
	'decode named entities' => [
	"\u{00E9}cole",
	'école',
	],
	'decode numeric entities' => [
	"\u{0108}io bonas dans l'\u{00E9}cole!",
	"Ĉio bonas dans l'école!",
	],
	'decode mixed numeric/named entities' => [
	"\u{0108}io bonas dans l'\u{00E9}cole!",
	"Ĉio bonas dans l'école!",
	],
	'decode mixed complex entities' => [
	"\u{0108}io bonas dans l'\u{00E9}cole! (mais pas Ĉio dans l'école)",
	"Ĉio bonas dans l'école! (mais pas &#x108;io dans l'&eacute;cole)",
	],
	'Invalid ampersand' => [
	'a & b',
	'a & b',
	],
	'Invalid named entity' => [
	'&foo;',
	'&foo;',
	],
	'Invalid numbered entity (decimal)' => [
	Constants::UTF8_REPLACEMENT,
	"&#888888888888888888;",
	],
	'Invalid numbered entity (hex)' => [
	Constants::UTF8_REPLACEMENT,
	"&#x88888888888888888;",
	],
	// These cases are also "very large" numbers, but they will
	// truncate down to ASCII. So be careful.
	'Invalid numbered entity w/ valid truncation (decimal)' => [
	Constants::UTF8_REPLACEMENT,
	"&#18446744073709551681;",
	],
	'Invalid numbered entity w/ valid truncation (hex)' => [
	Constants::UTF8_REPLACEMENT,
	"&#x10000000000000041;",
	],
	];
	}

	/**
	* @dataProvider provideTagAttributesToDecode
	* @covers \MediaWiki\Parser\Sanitizer::decodeTagAttributes
	*/
	public function testDecodeTagAttributes( $expected, $attributes, $message = '' ) {
	$this->assertSame( $expected,
	Sanitizer::decodeTagAttributes( $attributes ),
	$message
	);
	}

	public static function provideTagAttributesToDecode() {
	return [
	[ [ 'foo' => 'bar' ], 'foo=bar', 'Unquoted attribute' ],
	[ [ 'עברית' => 'bar' ], 'עברית=bar', 'Non-Latin attribute' ],
	[ [ '६' => 'bar' ], '६=bar', 'Devanagari number' ],
	[ [ '搭𨋢' => 'bar' ], '搭𨋢=bar', 'Non-BMP character' ],
	[ [], 'ńgh=bar', 'Combining accent is not allowed' ],
	[ [ 'foo' => 'bar' ], ' foo = bar ', 'Spaced attribute' ],
	[ [ 'foo' => 'bar' ], 'foo="bar"', 'Double-quoted attribute' ],
	[ [ 'foo' => 'bar' ], 'foo=\'bar\'', 'Single-quoted attribute' ],
	[
	[ 'foo' => 'bar', 'baz' => 'foo' ],
	'foo=\'bar\' baz="foo"',
	'Several attributes'
	],
	[
	[ 'foo' => 'bar', 'baz' => 'foo' ],
	'foo=\'bar\' baz="foo"',
	'Several attributes'
	],
	[
	[ 'foo' => 'bar', 'baz' => 'foo' ],
	'foo=\'bar\' baz="foo"',
	'Several attributes'
	],
	[ [ ':foo' => 'bar' ], ':foo=\'bar\'', 'Leading :' ],
	[ [ '_foo' => 'bar' ], '_foo=\'bar\'', 'Leading _' ],
	[ [ 'foo' => 'bar' ], 'Foo=\'bar\'', 'Leading capital' ],
	[ [ 'foo' => 'BAR' ], 'FOO=BAR', 'Attribute keys are normalized to lowercase' ],

	# Invalid beginning
	[ [], '-foo=bar', 'Leading - is forbidden' ],
	[ [], '.foo=bar', 'Leading . is forbidden' ],
	[ [ 'foo-bar' => 'bar' ], 'foo-bar=bar', 'A - is allowed inside the attribute' ],
	[ [ 'foo-' => 'bar' ], 'foo-=bar', 'A - is allowed inside the attribute' ],
	[ [ 'foo.bar' => 'baz' ], 'foo.bar=baz', 'A . is allowed inside the attribute' ],
	[ [ 'foo.' => 'baz' ], 'foo.=baz', 'A . is allowed as last character' ],
	[ [ 'foo6' => 'baz' ], 'foo6=baz', 'Numbers are allowed' ],

	# This bit is more relaxed than XML rules, but some extensions use
	# it, like ProofreadPage (see T29539)
	[ [ '1foo' => 'baz' ], '1foo=baz', 'Leading numbers are allowed' ],
	[ [], 'foo$=baz', 'Symbols are not allowed' ],
	[ [], 'foo@=baz', 'Symbols are not allowed' ],
	[ [], 'foo~=baz', 'Symbols are not allowed' ],
	[
	[ 'foo' => '1[#^`*%w/(' ],
	'foo=1[#^`*%w/(',
	'All kind of characters are allowed as values'
	],
	[
	[ 'foo' => '1[#^`*%\'w/(' ],
	'foo="1[#^`*%\'w/("',
	'Double quotes are allowed if quoted by single quotes'
	],
	[
	[ 'foo' => '1[#^`*%"w/(' ],
	'foo=\'1[#^`*%"w/(\'',
	'Single quotes are allowed if quoted by double quotes'
	],
	[ [ 'foo' => '&"' ], 'foo=&"', 'Special chars can be provided as entities' ],
	[ [ 'foo' => '&foobar;' ], 'foo=&foobar;', 'Entity-like items are accepted' ],
	];
	}

	/**
	* @dataProvider provideCssCommentsFixtures
	* @covers \MediaWiki\Parser\Sanitizer::checkCss
	*/
	public function testCssCommentsChecking( $expected, $css, $message = '' ) {
	$this->assertSame( $expected,
	Sanitizer::checkCss( $css ),
	$message
	);
	}

	public static function provideCssCommentsFixtures() {
	/** [ <expected>, <css>, [message] ] */
	return [
	// Valid comments spanning entire input
	[ '//', '//' ],
	[ '/* comment /', '/ comment */' ],
	// Weird stuff
	[ ' ', '/****/' ],
	[ ' ', '/* /* */' ],
	[ 'display: block;', "display:/* foo */block;" ],
	[ 'display: block;', "display:\\2f\\2a foo \\2a\\2f block;",
	'Backslash-escaped comments must be stripped (T30450)' ],
	[ '', '/* unfinished comment structure',
	'Remove anything after a comment-start token' ],
	[ '', "\\2f\\2a unifinished comment'",
	'Remove anything after a backslash-escaped comment-start token' ],
	[ '/* insecure input */', 'width: expression(1+1);' ],
	[ '/* insecure input */', 'background-image: image(asdf.png);' ],
	[ '/* insecure input */', 'background-image: -webkit-image(asdf.png);' ],
	[ '/* insecure input */', 'background-image: -moz-image(asdf.png);' ],
	[ '/* insecure input */', 'background-image: image-set("asdf.png" 1x, "asdf.png" 2x);' ],
	[
	'/* insecure input */',
	'background-image: -webkit-image-set("asdf.png" 1x, "asdf.png" 2x);'
	],
	[
	'/* insecure input */',
	'background-image: -moz-image-set("asdf.png" 1x, "asdf.png" 2x);'
	],
	[ '/* insecure input */', 'foo: attr( title, url );' ],
	[ '/* insecure input */', 'foo: attr( title url );' ],
	];
	}

	/**
	* @dataProvider provideEscapeHtmlAllowEntities
	* @covers \MediaWiki\Parser\Sanitizer::escapeHtmlAllowEntities
	*/
	public function testEscapeHtmlAllowEntities( $expected, $html ) {
	$this->assertSame(
	$expected,
	Sanitizer::escapeHtmlAllowEntities( $html )
	);
	}

	public static function provideEscapeHtmlAllowEntities() {
	return [
	[ 'foo', 'foo' ],
	[ 'a¡b', 'a¡b' ],
	[ 'foo'bar', "foo'bar" ],
	[ '<script>foo</script>', '<script>foo</script>' ],
	[ '̸', "\u{0338}" ],
	[ '̸', '̸' ],
	];
	}

	/**
	* @dataProvider provideIsReservedDataAttribute
	* @covers \MediaWiki\Parser\Sanitizer::isReservedDataAttribute
	*/
	public function testIsReservedDataAttribute( $attr, $expected ) {
	$this->assertSame( $expected, Sanitizer::isReservedDataAttribute( $attr ) );
	}

	public static function provideIsReservedDataAttribute() {
	return [
	[ 'foo', false ],
	[ 'data', false ],
	[ 'data-foo', false ],
	[ 'data-mw', true ],
	[ 'data-ooui', true ],
	[ 'data-parsoid', true ],
	[ 'data-mw-foo', true ],
	[ 'data-ooui-foo', true ],
	// could be false but this is how it's implemented currently
	[ 'data-mwfoo', true ],
	];
	}

	/**
	* @dataProvider provideStripAllTags
	*
	* @covers \MediaWiki\Parser\Sanitizer::stripAllTags()
	* @covers \MediaWiki\Parser\RemexStripTagHandler
	*
	* @param string $input
	* @param string $expected
	*/
	public function testStripAllTags( $input, $expected ) {
	$this->assertSame( $expected, Sanitizer::stripAllTags( $input ) );
	}

	public static function provideStripAllTags() {
	return [
	[ '<p>Foo</p>', 'Foo' ],
	[ '<p id="one">Foo</p><p id="two">Bar</p>', 'Foo Bar' ],
	[ "<p>Foo</p>\n<p>Bar</p>", 'Foo Bar' ],
	[ '<p>Hello <strong> world café</p>', 'Hello <strong> world café' ],
	[
	'<p><small data-foo=\'bar"<baz>quux\'><a href="./Foo">Bar</a></small> Whee!</p>',
	'Bar Whee!'
	],
	[ '1<span class="<?php">2</span>3', '123' ],
	[ '1<span class="<?">2</span>3', '123' ],
	[ '<th>1</th><td>2</td>', '1 2' ],
	[ '<style>.hello { display: block; }</style>', '' ],
	[ 'Foo<style>p { color: red; }</style>Bar', 'FooBar' ],
	[ '<script>var test = true;</script>', '' ],
	];
	}

	}

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