markTestSkipped( 'Test requires the mbstring PHP extension' ); } $this->assertEquals( $expected, StringUtils::isUtf8( $string ), 'Testing string "' . $this->escaped( $string ) . '" with mb_check_encoding' ); } /** * This tests 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 */ public 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 a hexadecimal * @param string $string * @return string */ 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 */ public static function provideStringsForIsUtf8Check() { // Expected return values for StringUtils::isUtf8() $PASS = true; $FAIL = false; return array( 'some ASCII' => array( $PASS, 'Some ASCII' ), 'euro sign' => array( $PASS, "Euro sign €" ), 'first possible sequence 1 byte' => array( $PASS, "\x00" ), 'first possible sequence 2 bytes' => array( $PASS, "\xc2\x80" ), 'first possible sequence 3 bytes' => array( $PASS, "\xe0\xa0\x80" ), 'first possible sequence 4 bytes' => array( $PASS, "\xf0\x90\x80\x80" ), 'first possible sequence 5 bytes' => array( $FAIL, "\xf8\x88\x80\x80\x80" ), 'first possible sequence 6 bytes' => array( $FAIL, "\xfc\x84\x80\x80\x80\x80" ), 'last possible sequence 1 byte' => array( $PASS, "\x7f" ), 'last possible sequence 2 bytes' => array( $PASS, "\xdf\xbf" ), 'last possible sequence 3 bytes' => array( $PASS, "\xef\xbf\xbf" ), 'last possible sequence 4 bytes (U+1FFFFF)' => array( $FAIL, "\xf7\xbf\xbf\xbf" ), 'last possible sequence 5 bytes' => array( $FAIL, "\xfb\xbf\xbf\xbf\xbf" ), 'last possible sequence 6 bytes' => array( $FAIL, "\xfd\xbf\xbf\xbf\xbf\xbf" ), 'boundary 1' => array( $PASS, "\xed\x9f\xbf" ), 'boundary 2' => array( $PASS, "\xee\x80\x80" ), 'boundary 3' => array( $PASS, "\xef\xbf\xbd" ), 'boundary 4' => array( $PASS, "\xf2\x80\x80\x80" ), 'boundary 5 (U+FFFFF)' => array( $PASS, "\xf3\xbf\xbf\xbf" ), 'boundary 6 (U+100000)' => array( $PASS, "\xf4\x80\x80\x80" ), 'boundary 7 (U+10FFFF)' => array( $PASS, "\xf4\x8f\xbf\xbf" ), 'boundary 8 (U+110000)' => array( $FAIL, "\xf4\x90\x80\x80" ), 'malformed 1' => array( $FAIL, "\x80" ), 'malformed 2' => array( $FAIL, "\xbf" ), 'malformed 3' => array( $FAIL, "\x80\xbf" ), 'malformed 4' => array( $FAIL, "\x80\xbf\x80" ), 'malformed 5' => array( $FAIL, "\x80\xbf\x80\xbf" ), 'malformed 6' => array( $FAIL, "\x80\xbf\x80\xbf\x80" ), 'malformed 7' => array( $FAIL, "\x80\xbf\x80\xbf\x80\xbf" ), 'malformed 8' => array( $FAIL, "\x80\xbf\x80\xbf\x80\xbf\x80" ), 'last byte missing 1' => array( $FAIL, "\xc0" ), 'last byte missing 2' => array( $FAIL, "\xe0\x80" ), 'last byte missing 3' => array( $FAIL, "\xf0\x80\x80" ), 'last byte missing 4' => array( $FAIL, "\xf8\x80\x80\x80" ), 'last byte missing 5' => array( $FAIL, "\xfc\x80\x80\x80\x80" ), 'last byte missing 6' => array( $FAIL, "\xdf" ), 'last byte missing 7' => array( $FAIL, "\xef\xbf" ), 'last byte missing 8' => array( $FAIL, "\xf7\xbf\xbf" ), 'last byte missing 9' => array( $FAIL, "\xfb\xbf\xbf\xbf" ), 'last byte missing 10' => array( $FAIL, "\xfd\xbf\xbf\xbf\xbf" ), 'extra continuation byte 1' => array( $FAIL, "e\xaf" ), 'extra continuation byte 2' => array( $FAIL, "\xc3\x89\xaf" ), 'extra continuation byte 3' => array( $FAIL, "\xef\xbc\xa5\xaf" ), 'extra continuation byte 4' => array( $FAIL, "\xf0\x9d\x99\xb4\xaf" ), 'impossible bytes 1' => array( $FAIL, "\xfe" ), 'impossible bytes 2' => array( $FAIL, "\xff" ), 'impossible bytes 3' => array( $FAIL, "\xfe\xfe\xff\xff" ), 'overlong sequences 1' => array( $FAIL, "\xc0\xaf" ), 'overlong sequences 2' => array( $FAIL, "\xc1\xaf" ), 'overlong sequences 3' => array( $FAIL, "\xe0\x80\xaf" ), 'overlong sequences 4' => array( $FAIL, "\xf0\x80\x80\xaf" ), 'overlong sequences 5' => array( $FAIL, "\xf8\x80\x80\x80\xaf" ), 'overlong sequences 6' => array( $FAIL, "\xfc\x80\x80\x80\x80\xaf" ), 'maximum overlong sequences 1' => array( $FAIL, "\xc1\xbf" ), 'maximum overlong sequences 2' => array( $FAIL, "\xe0\x9f\xbf" ), 'maximum overlong sequences 3' => array( $FAIL, "\xf0\x8f\xbf\xbf" ), 'maximum overlong sequences 4' => array( $FAIL, "\xf8\x87\xbf\xbf" ), 'maximum overlong sequences 5' => array( $FAIL, "\xfc\x83\xbf\xbf\xbf\xbf" ), 'surrogates 1 (U+D799)' => array( $PASS, "\xed\x9f\xbf" ), 'surrogates 2 (U+E000)' => array( $PASS, "\xee\x80\x80" ), 'surrogates 3 (U+D800)' => array( $FAIL, "\xed\xa0\x80" ), 'surrogates 4 (U+DBFF)' => array( $FAIL, "\xed\xaf\xbf" ), 'surrogates 5 (U+DC00)' => array( $FAIL, "\xed\xb0\x80" ), 'surrogates 6 (U+DFFF)' => array( $FAIL, "\xed\xbf\xbf" ), 'surrogates 7 (U+D800 U+DC00)' => array( $FAIL, "\xed\xa0\x80\xed\xb0\x80" ), 'noncharacters 1' => array( $PASS, "\xef\xbf\xbe" ), 'noncharacters 2' => array( $PASS, "\xef\xbf\xbf" ), ); } }