vendor/swiftmailer/swiftmailer/tests/unit/Swift/Mime/HeaderEncoder/QpHeaderEncoderTest.php

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<?php

class Swift_Mime_HeaderEncoder_QpHeaderEncoderTest extends \SwiftMailerTestCase
{
    //Most tests are already covered in QpEncoderTest since this subclass only
    // adds a getName() method

    public function testNameIsQ()
    {
        $encoder = $this->_createEncoder(
            $this->_createCharacterStream(true)
            );
        $this->assertEquals('Q', $encoder->getName());
    }

    public function testSpaceAndTabNeverAppear()
    {
        /* -- RFC 2047, 4.
     Only a subset of the printable ASCII characters may be used in
     'encoded-text'.  Space and tab characters are not allowed, so that
     the beginning and end of an 'encoded-word' are obvious.
     */

        $charStream = $this->_createCharacterStream();
        $charStream->shouldReceive('readBytes')
                   ->atLeast()->times(6)
                   ->andReturn(array(ord('a')), array(0x20), array(0x09), array(0x20), array(ord('b')), false);

        $encoder = $this->_createEncoder($charStream);
        $this->assertNotRegExp('~[ \t]~', $encoder->encodeString("a \t b"),
            '%s: encoded-words in headers cannot contain LWSP as per RFC 2047.'
            );
    }

    public function testSpaceIsRepresentedByUnderscore()
    {
        /* -- RFC 2047, 4.2.
        (2) The 8-bit hexadecimal value 20 (e.g., ISO-8859-1 SPACE) may be
       represented as "_" (underscore, ASCII 95.).  (This character may
       not pass through some internetwork mail gateways, but its use
       will greatly enhance readability of "Q" encoded data with mail
       readers that do not support this encoding.)  Note that the "_"
       always represents hexadecimal 20, even if the SPACE character
       occupies a different code position in the character set in use.
       */
        $charStream = $this->_createCharacterStream();
        $charStream->shouldReceive('readBytes')
                   ->once()
                   ->andReturn(array(ord('a')));
        $charStream->shouldReceive('readBytes')
                   ->once()
                   ->andReturn(array(0x20));
        $charStream->shouldReceive('readBytes')
                   ->once()
                   ->andReturn(array(ord('b')));
        $charStream->shouldReceive('readBytes')
                   ->zeroOrMoreTimes()
                   ->andReturn(false);

        $encoder = $this->_createEncoder($charStream);