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drkthunder02
2019-06-23 10:14:30 +00:00
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vendor/symfony/mime/Tests/Encoder/QpEncoderTest.php vendored Normal file
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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Mime\Tests\Encoder;
use PHPUnit\Framework\TestCase;
use Symfony\Component\Mime\Encoder\QpEncoder;
class QpEncoderTest extends TestCase
{
/* -- RFC 2045, 6.7 --
(1) (General 8bit representation) Any octet, except a CR or
LF that is part of a CRLF line break of the canonical
(standard) form of the data being encoded, may be
represented by an "=" followed by a two digit
hexadecimal representation of the octet's value. The
digits of the hexadecimal alphabet, for this purpose,
are "0123456789ABCDEF". Uppercase letters must be
used; lowercase letters are not allowed. Thus, for
example, the decimal value 12 (US-ASCII form feed) can
be represented by "=0C", and the decimal value 61 (US-
ASCII EQUAL SIGN) can be represented by "=3D". This
rule must be followed except when the following rules
allow an alternative encoding.
*/
public function testPermittedCharactersAreNotEncoded()
{
/* -- RFC 2045, 6.7 --
(2) (Literal representation) Octets with decimal values of
33 through 60 inclusive, and 62 through 126, inclusive,
MAY be represented as the US-ASCII characters which
correspond to those octets (EXCLAMATION POINT through
LESS THAN, and GREATER THAN through TILDE,
respectively).
*/
$encoder = new QpEncoder();
foreach (array_merge(range(33, 60), range(62, 126)) as $ordinal) {
$char = \chr($ordinal);
$this->assertSame($char, $encoder->encodeString($char));
}
}
public function testWhiteSpaceAtLineEndingIsEncoded()
{
/* -- RFC 2045, 6.7 --
(3) (White Space) Octets with values of 9 and 32 MAY be
represented as US-ASCII TAB (HT) and SPACE characters,
respectively, but MUST NOT be so represented at the end
of an encoded line. Any TAB (HT) or SPACE characters
on an encoded line MUST thus be followed on that line
by a printable character. In particular, an "=" at the
end of an encoded line, indicating a soft line break
(see rule #5) may follow one or more TAB (HT) or SPACE
characters. It follows that an octet with decimal
value 9 or 32 appearing at the end of an encoded line
must be represented according to Rule #1. This rule is
necessary because some MTAs (Message Transport Agents,
programs which transport messages from one user to
another, or perform a portion of such transfers) are
known to pad lines of text with SPACEs, and others are
known to remove "white space" characters from the end
of a line. Therefore, when decoding a Quoted-Printable
body, any trailing white space on a line must be
deleted, as it will necessarily have been added by
intermediate transport agents.
*/
$encoder = new QpEncoder();
$HT = \chr(0x09); // 9
$SPACE = \chr(0x20); // 32
// HT
$string = 'a'.$HT.$HT."\r\n".'b';
$this->assertEquals('a'.$HT.'=09'."\r\n".'b', $encoder->encodeString($string));
// SPACE
$string = 'a'.$SPACE.$SPACE."\r\n".'b';
$this->assertEquals('a'.$SPACE.'=20'."\r\n".'b', $encoder->encodeString($string));
}
public function testCRLFIsLeftAlone()
{
/*
(4) (Line Breaks) A line break in a text body, represented
as a CRLF sequence in the text canonical form, must be
represented by a (RFC 822) line break, which is also a
CRLF sequence, in the Quoted-Printable encoding. Since
the canonical representation of media types other than
text do not generally include the representation of
line breaks as CRLF sequences, no hard line breaks
(i.e. line breaks that are intended to be meaningful
and to be displayed to the user) can occur in the
quoted-printable encoding of such types. Sequences
like "=0D", "=0A", "=0A=0D" and "=0D=0A" will routinely
appear in non-text data represented in quoted-
printable, of course.
Note that many implementations may elect to encode the
local representation of various content types directly
rather than converting to canonical form first,
encoding, and then converting back to local
representation. In particular, this may apply to plain
text material on systems that use newline conventions
other than a CRLF terminator sequence. Such an
implementation optimization is permissible, but only
when the combined canonicalization-encoding step is
equivalent to performing the three steps separately.
*/
$encoder = new QpEncoder();
$string = 'a'."\r\n".'b'."\r\n".'c'."\r\n";
$this->assertEquals($string, $encoder->encodeString($string));
}
public function testLinesLongerThan76CharactersAreSoftBroken()
{
/*
(5) (Soft Line Breaks) The Quoted-Printable encoding
REQUIRES that encoded lines be no more than 76
characters long. If longer lines are to be encoded
with the Quoted-Printable encoding, "soft" line breaks
must be used. An equal sign as the last character on a
encoded line indicates such a non-significant ("soft")
line break in the encoded text.
*/
$encoder = new QpEncoder();
$input = str_repeat('a', 140);
$output = '';
for ($i = 0; $i < 140; ++$i) {
// we read 4 chars at a time (max is 75)
if (18 * 4 /* 72 */ == $i) {
$output .= "=\r\n";
}
$output .= 'a';
}
$this->assertEquals($output, $encoder->encodeString($input));
}
public function testMaxLineLengthCanBeSpecified()
{
$encoder = new QpEncoder();
$input = str_repeat('a', 100);
$output = '';
for ($i = 0; $i < 100; ++$i) {
// we read 4 chars at a time (max is 53)
if (13 * 4 /* 52 */ == $i) {
$output .= "=\r\n";
}
$output .= 'a';
}
$this->assertEquals($output, $encoder->encodeString($input, 'utf-8', 0, 54));
}
public function testBytesBelowPermittedRangeAreEncoded()
{
// According to Rule (1 & 2)
$encoder = new QpEncoder();
foreach (range(0, 32) as $ordinal) {
$char = \chr($ordinal);
$this->assertEquals(sprintf('=%02X', $ordinal), $encoder->encodeString($char));
}
}
public function testDecimalByte61IsEncoded()
{
// According to Rule (1 & 2)
$encoder = new QpEncoder();
$this->assertEquals('=3D', $encoder->encodeString('='));
}
public function testBytesAbovePermittedRangeAreEncoded()
{
// According to Rule (1 & 2)
$encoder = new QpEncoder();
foreach (range(127, 255) as $ordinal) {
$this->assertSame(sprintf('=%02X', $ordinal), $encoder->encodeString(\chr($ordinal), 'iso-8859-1'));
}
}
public function testFirstLineLengthCanBeDifferent()
{
$encoder = new QpEncoder();
$input = str_repeat('a', 140);
$output = '';
for ($i = 0; $i < 140; ++$i) {
// we read 4 chars at a time (max is 54 for the first line and 75 for the second one)
if (13 * 4 == $i || 13 * 4 + 18 * 4 == $i) {
$output .= "=\r\n";
}
$output .= 'a';
}
$this->assertEquals($output, $encoder->encodeString($input, 'utf-8', 22), 'First line should start at offset 22 so can only have max length 54');
}
public function testTextIsPreWrapped()
{
$encoder = new QpEncoder();
$input = str_repeat('a', 70)."\r\n".str_repeat('a', 70)."\r\n".str_repeat('a', 70);
$this->assertEquals($input, $encoder->encodeString($input));
}
}