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-rw-r--r--tests/phpunit/includes/libs/StringUtilsTest.php149
1 files changed, 149 insertions, 0 deletions
diff --git a/tests/phpunit/includes/libs/StringUtilsTest.php b/tests/phpunit/includes/libs/StringUtilsTest.php
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index 00000000..7c24fae6
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+++ b/tests/phpunit/includes/libs/StringUtilsTest.php
@@ -0,0 +1,149 @@
+<?php
+
+class StringUtilsTest extends PHPUnit_Framework_TestCase {
+
+ /**
+ * This tests StringUtils::isUtf8 whenever we have the mbstring extension
+ * loaded.
+ *
+ * @covers StringUtils::isUtf8
+ * @dataProvider provideStringsForIsUtf8Check
+ */
+ public 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 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" ),
+ );
+ }
+}