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vendor/symfony/mime/Tests/Encoder/Base64EncoderTest.php
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vendor/symfony/mime/Tests/Encoder/Base64EncoderTest.php
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<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\Mime\Tests\Encoder;
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use PHPUnit\Framework\TestCase;
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use Symfony\Component\Mime\Encoder\Base64Encoder;
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class Base64EncoderTest extends TestCase
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{
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/*
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There's really no point in testing the entire base64 encoding to the
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level QP encoding has been tested. base64_encode() has been in PHP for
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years.
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*/
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public function testInputOutputRatioIs3to4Bytes()
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{
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/*
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RFC 2045, 6.8
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The encoding process represents 24-bit groups of input bits as output
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strings of 4 encoded characters. Proceeding from left to right, a
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24-bit input group is formed by concatenating 3 8bit input groups.
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These 24 bits are then treated as 4 concatenated 6-bit groups, each
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of which is translated into a single digit in the base64 alphabet.
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*/
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$encoder = new Base64Encoder();
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$this->assertEquals('MTIz', $encoder->encodeString('123'), '3 bytes of input should yield 4 bytes of output');
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$this->assertEquals('MTIzNDU2', $encoder->encodeString('123456'), '6 bytes in input should yield 8 bytes of output');
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$this->assertEquals('MTIzNDU2Nzg5', $encoder->encodeString('123456789'), '%s: 9 bytes in input should yield 12 bytes of output');
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}
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public function testPadLength()
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{
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/*
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RFC 2045, 6.8
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Special processing is performed if fewer than 24 bits are available
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at the end of the data being encoded. A full encoding quantum is
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always completed at the end of a body. When fewer than 24 input bits
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are available in an input group, zero bits are added (on the right)
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to form an integral number of 6-bit groups. Padding at the end of
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the data is performed using the "=" character. Since all base64
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input is an integral number of octets, only the following cases can
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arise: (1) the final quantum of encoding input is an integral
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multiple of 24 bits; here, the final unit of encoded output will be
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an integral multiple of 4 characters with no "=" padding, (2) the
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final quantum of encoding input is exactly 8 bits; here, the final
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unit of encoded output will be two characters followed by two "="
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padding characters, or (3) the final quantum of encoding input is
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exactly 16 bits; here, the final unit of encoded output will be three
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characters followed by one "=" padding character.
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*/
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$encoder = new Base64Encoder();
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for ($i = 0; $i < 30; ++$i) {
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$input = pack('C', random_int(0, 255));
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$this->assertRegExp('~^[a-zA-Z0-9/\+]{2}==$~', $encoder->encodeString($input), 'A single byte should have 2 bytes of padding');
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}
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for ($i = 0; $i < 30; ++$i) {
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$input = pack('C*', random_int(0, 255), random_int(0, 255));
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$this->assertRegExp('~^[a-zA-Z0-9/\+]{3}=$~', $encoder->encodeString($input), 'Two bytes should have 1 byte of padding');
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}
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for ($i = 0; $i < 30; ++$i) {
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$input = pack('C*', random_int(0, 255), random_int(0, 255), random_int(0, 255));
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$this->assertRegExp('~^[a-zA-Z0-9/\+]{4}$~', $encoder->encodeString($input), 'Three bytes should have no padding');
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}
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}
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public function testMaximumLineLengthIs76Characters()
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{
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/*
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The encoded output stream must be represented in lines of no more
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than 76 characters each. All line breaks or other characters not
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found in Table 1 must be ignored by decoding software.
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*/
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$input =
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'abcdefghijklmnopqrstuvwxyz'.
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'ABCDEFGHIJKLMNOPQRSTUVWXYZ'.
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'1234567890'.
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'abcdefghijklmnopqrstuvwxyz'.
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'ABCDEFGHIJKLMNOPQRSTUVWXYZ'.
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'1234567890'.
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'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
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$output =
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'YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXpBQk'.//38
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'NERUZHSElKS0xNTk9QUVJTVFVWV1hZWjEyMzQ1'."\r\n".//76 *
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'Njc4OTBhYmNkZWZnaGlqa2xtbm9wcXJzdHV2d3'.//38
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'h5ekFCQ0RFRkdISUpLTE1OT1BRUlNUVVZXWFla'."\r\n".//76 *
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'MTIzNDU2Nzg5MEFCQ0RFRkdISUpLTE1OT1BRUl'.//38
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'NUVVZXWFla'; //48
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$encoder = new Base64Encoder();
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$this->assertEquals($output, $encoder->encodeString($input), 'Lines should be no more than 76 characters');
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}
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public function testMaximumLineLengthCanBeSpecified()
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{
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$input =
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'abcdefghijklmnopqrstuvwxyz'.
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'ABCDEFGHIJKLMNOPQRSTUVWXYZ'.
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'1234567890'.
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'abcdefghijklmnopqrstuvwxyz'.
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'ABCDEFGHIJKLMNOPQRSTUVWXYZ'.
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'1234567890'.
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'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
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$output =
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'YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXpBQk'.//38
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'NERUZHSElKS0'."\r\n".//50 *
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'xNTk9QUVJTVFVWV1hZWjEyMzQ1Njc4OTBhYmNk'.//38
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'ZWZnaGlqa2xt'."\r\n".//50 *
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'bm9wcXJzdHV2d3h5ekFCQ0RFRkdISUpLTE1OT1'.//38
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'BRUlNUVVZXWF'."\r\n".//50 *
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'laMTIzNDU2Nzg5MEFCQ0RFRkdISUpLTE1OT1BR'.//38
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'UlNUVVZXWFla'; //50 *
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$encoder = new Base64Encoder();
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$this->assertEquals($output, $encoder->encodeString($input, 'utf-8', 0, 50), 'Lines should be no more than 100 characters');
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}
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public function testFirstLineLengthCanBeDifferent()
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{
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$input =
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'abcdefghijklmnopqrstuvwxyz'.
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'ABCDEFGHIJKLMNOPQRSTUVWXYZ'.
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'1234567890'.
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'abcdefghijklmnopqrstuvwxyz'.
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'ABCDEFGHIJKLMNOPQRSTUVWXYZ'.
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'1234567890'.
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'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
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$output =
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'YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXpBQk'.//38
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'NERUZHSElKS0xNTk9QU'."\r\n".//57 *
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'VJTVFVWV1hZWjEyMzQ1Njc4OTBhYmNkZWZnaGl'.//38
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'qa2xtbm9wcXJzdHV2d3h5ekFCQ0RFRkdISUpLT'."\r\n".//76 *
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'E1OT1BRUlNUVVZXWFlaMTIzNDU2Nzg5MEFCQ0R'.//38
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'FRkdISUpLTE1OT1BRUlNUVVZXWFla'; //67
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$encoder = new Base64Encoder();
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$this->assertEquals($output, $encoder->encodeString($input, 'utf-8', 19), 'First line offset is 19 so first line should be 57 chars long');
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}
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}
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