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<?php
class StringUtilsTest extends MediaWikiTestCase {
/**
* This test StringUtils::isUtf8 whenever we have mbstring extension
* loaded.
*
* @covers StringUtils::isUtf8
* @dataProvider provideStringsForIsUtf8Check
*/
function testIsUtf8WithMbstring( $expected, $string ) {
if ( !function_exists( 'mb_check_encoding' ) ) {
$this->markTestSkipped( 'Test requires the mbstring PHP extension' );
}
$this->assertEquals( $expected,
StringUtils::isUtf8( $string ),
'Testing string "' . $this->escaped( $string ) . '" with mb_check_encoding'
);
}
/**
* This test StringUtils::isUtf8 making sure we use the pure PHP
* implementation used as a fallback when mb_check_encoding() is
* not available.
*
* @covers StringUtils::isUtf8
* @dataProvider provideStringsForIsUtf8Check
*/
function testIsUtf8WithPhpFallbackImplementation( $expected, $string ) {
$this->assertEquals( $expected,
StringUtils::isUtf8( $string, /** disable mbstring: */ true ),
'Testing string "' . $this->escaped( $string ) . '" with pure PHP implementation'
);
}
/**
* Print high range characters as an hexadecimal
*/
function escaped( $string ) {
$escaped = '';
$length = strlen( $string );
for ( $i = 0; $i < $length; $i++ ) {
$char = $string[$i];
$val = ord( $char );
if ( $val > 127 ) {
$escaped .= '\x' . dechex( $val );
} else {
$escaped .= $char;
}
}
return $escaped;
}
/**
* See also "UTF-8 decoder capability and stress test" by
* Markus Kuhn:
* http://www.cl.cam.ac.uk/~mgk25/ucs/examples/UTF-8-test.txt
*/
function provideStringsForIsUtf8Check() {
// Expected return values for StringUtils::isUtf8()
$PASS = true;
$FAIL = false;
return array(
array( $PASS, 'Some ASCII' ),
array( $PASS, "Euro sign €" ),
# First possible sequences
array( $PASS, "\x00" ),
array( $PASS, "\xc2\x80" ),
array( $PASS, "\xe0\xa0\x80" ),
array( $PASS, "\xf0\x90\x80\x80" ),
array( $PASS, "\xf8\x88\x80\x80\x80" ),
array( $PASS, "\xfc\x84\x80\x80\x80\x80" ),
# Last possible sequence
array( $PASS, "\x7f" ),
array( $PASS, "\xdf\xbf" ),
array( $PASS, "\xef\xbf\xbf" ),
array( $PASS, "\xf7\xbf\xbf\xbf" ),
array( $PASS, "\xfb\xbf\xbf\xbf\xbf" ),
array( $FAIL, "\xfd\xbf\xbf\xbf\xbf\xbf" ),
# boundaries:
array( $PASS, "\xed\x9f\xbf" ),
array( $PASS, "\xee\x80\x80" ),
array( $PASS, "\xef\xbf\xbd" ),
array( $PASS, "\xf4\x8f\xbf\xbf" ),
array( $PASS, "\xf4\x90\x80\x80" ),
# Malformed
array( $FAIL, "\x80" ),
array( $FAIL, "\xBF" ),
array( $FAIL, "\x80\xbf" ),
array( $FAIL, "\x80\xbf\x80" ),
array( $FAIL, "\x80\xbf\x80\xbf" ),
array( $FAIL, "\x80\xbf\x80\xbf\x80" ),
array( $FAIL, "\x80\xbf\x80\xbf\x80\xbf" ),
array( $FAIL, "\x80\xbf\x80\xbf\x80\xbf\x80" ),
# last byte missing
array( $FAIL, "\xc0" ),
array( $FAIL, "\xe0\x80" ),
array( $FAIL, "\xf0\x80\x80" ),
array( $FAIL, "\xf8\x80\x80\x80" ),
array( $FAIL, "\xfc\x80\x80\x80\x80" ),
array( $FAIL, "\xdf" ),
array( $FAIL, "\xef\xbf" ),
array( $FAIL, "\xf7\xbf\xbf" ),
array( $FAIL, "\xfb\xbf\xbf\xbf" ),
array( $FAIL, "\xfd\xbf\xbf\xbf\xbf" ),
# impossible bytes
array( $FAIL, "\xfe" ),
array( $FAIL, "\xff" ),
array( $FAIL, "\xfe\xfe\xff\xff" ),
/**
# The PHP implementation does not handle characters
# being represented in a form which is too long :(
# overlong sequences
array( $FAIL, "\xc0\xaf" ),
array( $FAIL, "\xe0\x80\xaf" ),
array( $FAIL, "\xf0\x80\x80\xaf" ),
array( $FAIL, "\xf8\x80\x80\x80\xaf" ),
array( $FAIL, "\xfc\x80\x80\x80\x80\xaf" ),
# Maximum overlong sequences
array( $FAIL, "\xc1\xbf" ),
array( $FAIL, "\xe0\x9f\xbf" ),
array( $FAIL, "\xf0\x8F\xbf\xbf" ),
array( $FAIL, "\xf8\x87\xbf\xbf" ),
array( $FAIL, "\xfc\x83\xbf\xbf\xbf\xbf" ),
**/
# non characters
array( $PASS, "\xef\xbf\xbe" ),
array( $PASS, "\xef\xbf\xbf" ),
);
}
}
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