tests/phpunit/includes/media/JpegMetadataExtractorTest.php

   1 <?php
   2 /**
   3  * @todo Could use a test of extended XMP segments. Hard to find programs that
   4  * create example files, and creating my own in vim propbably wouldn't
   5  * serve as a very good "test". (Adobe photoshop probably creates such files
   6  * but it costs money). The implementation of it currently in MediaWiki is based
   7  * solely on reading the standard, without any real world test files.
   8  */
   9 class JpegMetadataExtractorTest extends MediaWikiTestCase {
  10
  11         protected function setUp() {
  12                 parent::setUp();
  13
  14                 $this->filePath = __DIR__ . '/../../data/media/';
  15         }
  16
  17         /**
  18          * We also use this test to test padding bytes don't
  19          * screw stuff up
  20          *
  21          * @param $file filename
  22          *
  23          * @dataProvider provideUtf8Comment
  24          */
  25         public function testUtf8Comment( $file ) {
  26                 $res = JpegMetadataExtractor::segmentSplitter( $this->filePath . $file );
  27                 $this->assertEquals( array( 'UTF-8 JPEG Comment — ¼' ), $res['COM'] );
  28         }
  29
  30         public static function provideUtf8Comment() {
  31                 return array(
  32                         array( 'jpeg-comment-utf.jpg' ),
  33                         array( 'jpeg-padding-even.jpg' ),
  34                         array( 'jpeg-padding-odd.jpg' ),
  35                 );
  36         }
  37
  38         /** The file is iso-8859-1, but it should get auto converted */
  39         public function testIso88591Comment() {
  40                 $res = JpegMetadataExtractor::segmentSplitter( $this->filePath . 'jpeg-comment-iso8859-1.jpg' );
  41                 $this->assertEquals( array( 'ISO-8859-1 JPEG Comment - ¼' ), $res['COM'] );
  42         }
  43
  44         /** Comment values that are non-textual (random binary junk) should not be shown.
  45          * The example test file has a comment with a 0x5 byte in it which is a control character
  46          * and considered binary junk for our purposes.
  47          */
  48         public function testBinaryCommentStripped() {
  49                 $res = JpegMetadataExtractor::segmentSplitter( $this->filePath . 'jpeg-comment-binary.jpg' );
  50                 $this->assertEmpty( $res['COM'] );
  51         }
  52
  53         /* Very rarely a file can have multiple comments.
  54          *   Order of comments is based on order inside the file.
  55          */
  56         public function testMultipleComment() {
  57                 $res = JpegMetadataExtractor::segmentSplitter( $this->filePath . 'jpeg-comment-multiple.jpg' );
  58                 $this->assertEquals( array( 'foo', 'bar' ), $res['COM'] );
  59         }
  60
  61         public function testXMPExtraction() {
  62                 $res = JpegMetadataExtractor::segmentSplitter( $this->filePath . 'jpeg-xmp-psir.jpg' );
  63                 $expected = file_get_contents( $this->filePath . 'jpeg-xmp-psir.xmp' );
  64                 $this->assertEquals( $expected, $res['XMP'] );
  65         }
  66
  67         public function testPSIRExtraction() {
  68                 $res = JpegMetadataExtractor::segmentSplitter( $this->filePath . 'jpeg-xmp-psir.jpg' );
  69                 $expected = '50686f746f73686f7020332e30003842494d04040000000000181c02190004746573741c02190003666f6f1c020000020004';
  70                 $this->assertEquals( $expected, bin2hex( $res['PSIR'][0] ) );
  71         }
  72
  73         public function testXMPExtractionAltAppId() {
  74                 $res = JpegMetadataExtractor::segmentSplitter( $this->filePath . 'jpeg-xmp-alt.jpg' );
  75                 $expected = file_get_contents( $this->filePath . 'jpeg-xmp-psir.xmp' );
  76                 $this->assertEquals( $expected, $res['XMP'] );
  77         }
  78
  79
  80         public function testIPTCHashComparisionNoHash() {
  81                 $segments = JpegMetadataExtractor::segmentSplitter( $this->filePath . 'jpeg-xmp-psir.jpg' );
  82                 $res = JpegMetadataExtractor::doPSIR( $segments['PSIR'][0] );
  83
  84                 $this->assertEquals( 'iptc-no-hash', $res );
  85         }
  86
  87         public function testIPTCHashComparisionBadHash() {
  88                 $segments = JpegMetadataExtractor::segmentSplitter( $this->filePath . 'jpeg-iptc-bad-hash.jpg' );
  89                 $res = JpegMetadataExtractor::doPSIR( $segments['PSIR'][0] );
  90
  91                 $this->assertEquals( 'iptc-bad-hash', $res );
  92         }
  93
  94         public function testIPTCHashComparisionGoodHash() {
  95                 $segments = JpegMetadataExtractor::segmentSplitter( $this->filePath . 'jpeg-iptc-good-hash.jpg' );
  96                 $res = JpegMetadataExtractor::doPSIR( $segments['PSIR'][0] );
  97
  98                 $this->assertEquals( 'iptc-good-hash', $res );
  99         }
 100
 101         public function testExifByteOrder() {
 102                 $res = JpegMetadataExtractor::segmentSplitter( $this->filePath . 'exif-user-comment.jpg' );
 103                 $expected = 'BE';
 104                 $this->assertEquals( $expected, $res['byteOrder'] );
 105         }
 106 }