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<?php
class Swift_Mime_ContentEncoder_Base64ContentEncoderTest extends \SwiftMailerTestCase
{
private $encoder;
protected function setUp()
{
$this->encoder = new Swift_Mime_ContentEncoder_Base64ContentEncoder();
}
public function testNameIsBase64()
{
$this->assertEquals('base64', $this->encoder->getName());
}
/*
There's really no point in testing the entire base64 encoding to the
level QP encoding has been tested. base64_encode() has been in PHP for
years.
*/
public function testInputOutputRatioIs3to4Bytes()
{
/*
RFC 2045, 6.8
The encoding process represents 24-bit groups of input bits as output
strings of 4 encoded characters. Proceeding from left to right, a
24-bit input group is formed by concatenating 3 8bit input groups.
These 24 bits are then treated as 4 concatenated 6-bit groups, each
of which is translated into a single digit in the base64 alphabet.
*/
$os = $this->createOutputByteStream();
$is = $this->createInputByteStream();
$collection = new Swift_StreamCollector();
$is->shouldReceive('write')
->zeroOrMoreTimes()
->andReturnUsing($collection);
$os->shouldReceive('read')
->once()
->andReturn('123');
$os->shouldReceive('read')
->zeroOrMoreTimes()
->andReturn(false);
$this->encoder->encodeByteStream($os, $is);
$this->assertEquals('MTIz', $collection->content);
}
public function testPadLength()
{
/*
RFC 2045, 6.8
Special processing is performed if fewer than 24 bits are available
at the end of the data being encoded. A full encoding quantum is
always completed at the end of a body. When fewer than 24 input bits
are available in an input group, zero bits are added (on the right)
to form an integral number of 6-bit groups. Padding at the end of
the data is performed using the "=" character. Since all base64
input is an integral number of octets, only the following cases can
arise: (1) the final quantum of encoding input is an integral
multiple of 24 bits; here, the final unit of encoded output will be
an integral multiple of 4 characters with no "=" padding, (2) the
final quantum of encoding input is exactly 8 bits; here, the final
unit of encoded output will be two characters followed by two "="
padding characters, or (3) the final quantum of encoding input is
exactly 16 bits; here, the final unit of encoded output will be three
characters followed by one "=" padding character.
*/
for ($i = 0; $i < 30; ++$i) {
$os = $this->createOutputByteStream();
$is = $this->createInputByteStream();
$collection = new Swift_StreamCollector();
$is->shouldReceive('write')
->zeroOrMoreTimes()
->andReturnUsing($collection);
$os->shouldReceive('read')
->once()
->andReturn(pack('C', random_int(0, 255)));
$os->shouldReceive('read')
->zeroOrMoreTimes()
->andReturn(false);
$this->encoder->encodeByteStream($os, $is);
$this->assertRegExp('~^[a-zA-Z0-9/\+]{2}==$~', $collection->content,
'%s: A single byte should have 2 bytes of padding'
);
}
for ($i = 0; $i < 30; ++$i) {
$os = $this->createOutputByteStream();
$is = $this->createInputByteStream();
$collection = new Swift_StreamCollector();
$is->shouldReceive('write')
->zeroOrMoreTimes()
->andReturnUsing($collection);
$os->shouldReceive('read')
->once()
->andReturn(pack('C*', random_int(0, 255), random_int(0, 255)));
$os->shouldReceive('read')
->zeroOrMoreTimes()
->andReturn(false);
$this->encoder->encodeByteStream($os, $is);
$this->assertRegExp('~^[a-zA-Z0-9/\+]{3}=$~', $collection->content,
'%s: Two bytes should have 1 byte of padding'
);
}
for ($i = 0; $i < 30; ++$i) {
$os = $this->createOutputByteStream();
$is = $this->createInputByteStream();
$collection = new Swift_StreamCollector();
$is->shouldReceive('write')
->zeroOrMoreTimes()
->andReturnUsing($collection);
$os->shouldReceive('read')
->once()
->andReturn(pack('C*', random_int(0, 255), random_int(0, 255), random_int(0, 255)));
$os->shouldReceive('read')
->zeroOrMoreTimes()
->andReturn(false);
$this->encoder->encodeByteStream($os, $is);
$this->assertRegExp('~^[a-zA-Z0-9/\+]{4}$~', $collection->content,
'%s: Three bytes should have no padding'
);
}
}
public function testMaximumLineLengthIs76Characters()
{
/*
The encoded output stream must be represented in lines of no more
than 76 characters each. All line breaks or other characters not
found in Table 1 must be ignored by decoding software.
*/
$os = $this->createOutputByteStream();
$is = $this->createInputByteStream();
$collection = new Swift_StreamCollector();
$is->shouldReceive('write')
->zeroOrMoreTimes()
->andReturnUsing($collection);
$os->shouldReceive('read')
->once()
->andReturn('abcdefghijkl'); //12
$os->shouldReceive('read')
->once()
->andReturn('mnopqrstuvwx'); //24
$os->shouldReceive('read')
->once()
->andReturn('yzabc1234567'); //36
$os->shouldReceive('read')
->once()
->andReturn('890ABCDEFGHI'); //48
$os->shouldReceive('read')
->once()
->andReturn('JKLMNOPQRSTU'); //60
$os->shouldReceive('read')
->once()
->andReturn('VWXYZ1234567'); //72
$os->shouldReceive('read')
->once()
->andReturn('abcdefghijkl'); //84
$os->shouldReceive('read')
->zeroOrMoreTimes()
->andReturn(false);
$this->encoder->encodeByteStream($os, $is);
$this->assertEquals(
"YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXphYmMxMjM0NTY3ODkwQUJDREVGR0hJSktMTU5PUFFS\r\n".
'U1RVVldYWVoxMjM0NTY3YWJjZGVmZ2hpamts',
$collection->content
);
}
public function testMaximumLineLengthCanBeDifferent()
{
$os = $this->createOutputByteStream();
$is = $this->createInputByteStream();
$collection = new Swift_StreamCollector();
$is->shouldReceive('write')
->zeroOrMoreTimes()
->andReturnUsing($collection);
$os->shouldReceive('read')
->once()
->andReturn('abcdefghijkl'); //12
$os->shouldReceive('read')
->once()
->andReturn('mnopqrstuvwx'); //24
$os->shouldReceive('read')
->once()
->andReturn('yzabc1234567'); //36
$os->shouldReceive('read')
->once()
->andReturn('890ABCDEFGHI'); //48
$os->shouldReceive('read')
->once()
->andReturn('JKLMNOPQRSTU'); //60
$os->shouldReceive('read')
->once()
->andReturn('VWXYZ1234567'); //72
$os->shouldReceive('read')
->once()
->andReturn('abcdefghijkl'); //84
$os->shouldReceive('read')
->zeroOrMoreTimes()
->andReturn(false);
$this->encoder->encodeByteStream($os, $is, 0, 50);
$this->assertEquals(
"YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXphYmMxMjM0NTY3OD\r\n".
"kwQUJDREVGR0hJSktMTU5PUFFSU1RVVldYWVoxMjM0NTY3YWJj\r\n".
'ZGVmZ2hpamts',
$collection->content
);
}
public function testMaximumLineLengthIsNeverMoreThan76Chars()
{
$os = $this->createOutputByteStream();
$is = $this->createInputByteStream();
$collection = new Swift_StreamCollector();
$is->shouldReceive('write')
->zeroOrMoreTimes()
->andReturnUsing($collection);
$os->shouldReceive('read')
->once()
->andReturn('abcdefghijkl'); //12
$os->shouldReceive('read')
->once()
->andReturn('mnopqrstuvwx'); //24
$os->shouldReceive('read')
->once()
->andReturn('yzabc1234567'); //36
$os->shouldReceive('read')
->once()
->andReturn('890ABCDEFGHI'); //48
$os->shouldReceive('read')
->once()
->andReturn('JKLMNOPQRSTU'); //60
$os->shouldReceive('read')
->once()
->andReturn('VWXYZ1234567'); //72
$os->shouldReceive('read')
->once()
->andReturn('abcdefghijkl'); //84
$os->shouldReceive('read')
->zeroOrMoreTimes()
->andReturn(false);
$this->encoder->encodeByteStream($os, $is, 0, 100);
$this->assertEquals(
"YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXphYmMxMjM0NTY3ODkwQUJDREVGR0hJSktMTU5PUFFS\r\n".
'U1RVVldYWVoxMjM0NTY3YWJjZGVmZ2hpamts',
$collection->content
);
}
public function testFirstLineLengthCanBeDifferent()
{
$os = $this->createOutputByteStream();
$is = $this->createInputByteStream();
$collection = new Swift_StreamCollector();
$is->shouldReceive('write')
->zeroOrMoreTimes()
->andReturnUsing($collection);
$os->shouldReceive('read')
->once()
->andReturn('abcdefghijkl'); //12
$os->shouldReceive('read')
->once()
->andReturn('mnopqrstuvwx'); //24
$os->shouldReceive('read')
->once()
->andReturn('yzabc1234567'); //36
$os->shouldReceive('read')
->once()
->andReturn('890ABCDEFGHI'); //48
$os->shouldReceive('read')
->once()
->andReturn('JKLMNOPQRSTU'); //60
$os->shouldReceive('read')
->once()
->andReturn('VWXYZ1234567'); //72
$os->shouldReceive('read')
->once()
->andReturn('abcdefghijkl'); //84
$os->shouldReceive('read')
->zeroOrMoreTimes()
->andReturn(false);
$this->encoder->encodeByteStream($os, $is, 19);
$this->assertEquals(
"YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXphYmMxMjM0NTY3ODkwQUJDR\r\n".
'EVGR0hJSktMTU5PUFFSU1RVVldYWVoxMjM0NTY3YWJjZGVmZ2hpamts',
$collection->content
);
}
private function createOutputByteStream($stub = false)
{
return $this->getMockery('Swift_OutputByteStream')->shouldIgnoreMissing();
}
private function createInputByteStream($stub = false)
{
return $this->getMockery('Swift_InputByteStream')->shouldIgnoreMissing();
}
}