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         public function setUp() {
  12                 $this->filePath = dirname( __FILE__ ) . '/../../data/media/';
  13         }
  14
  15         /**
  16          * We also use this test to test padding bytes don't
  17          * screw stuff up
  18          *
  19          * @param $file filename
  20          *
  21          * @dataProvider dataUtf8Comment
  22          */
  23         public function testUtf8Comment( $file ) {
  24                 $res = JpegMetadataExtractor::segmentSplitter( $this->filePath . $file );
  25                 $this->assertEquals( array( 'UTF-8 JPEG Comment — ¼' ), $res['COM'] );
  26         }
  27         public function dataUtf8Comment() {
  28                 return array(
  29                         array( 'jpeg-comment-utf.jpg' ),
  30                         array( 'jpeg-padding-even.jpg' ),
  31                         array( 'jpeg-padding-odd.jpg' ),
  32                 );
  33         }
  34         /** The file is iso-8859-1, but it should get auto converted */
  35         public function testIso88591Comment() {
  36                 $res = JpegMetadataExtractor::segmentSplitter( $this->filePath . 'jpeg-comment-iso8859-1.jpg' );
  37                 $this->assertEquals( array( 'ISO-8859-1 JPEG Comment - ¼' ), $res['COM'] );
  38         }
  39         /** Comment values that are non-textual (random binary junk) should not be shown.
  40          * The example test file has a comment with a 0x5 byte in it which is a control character
  41          * and considered binary junk for our purposes.
  42          */
  43         public function testBinaryCommentStripped() {
  44                 $res = JpegMetadataExtractor::segmentSplitter( $this->filePath . 'jpeg-comment-binary.jpg' );
  45                 $this->assertEmpty( $res['COM'] );
  46         }
  47         /* Very rarely a file can have multiple comments.
  48          *   Order of comments is based on order inside the file.
  49          */
  50         public function testMultipleComment() {
  51                 $res = JpegMetadataExtractor::segmentSplitter( $this->filePath . 'jpeg-comment-multiple.jpg' );
  52                 $this->assertEquals( array( 'foo', 'bar' ), $res['COM'] );
  53         }
  54         public function testXMPExtraction() {
  55                 $res = JpegMetadataExtractor::segmentSplitter( $this->filePath . 'jpeg-xmp-psir.jpg' );
  56                 $expected = file_get_contents( $this->filePath . 'jpeg-xmp-psir.xmp' );
  57                 $this->assertEquals( $expected, $res['XMP'] );
  58         }
  59         public function testPSIRExtraction() {
  60                 $res = JpegMetadataExtractor::segmentSplitter( $this->filePath . 'jpeg-xmp-psir.jpg' );
  61                 $expected = '50686f746f73686f7020332e30003842494d04040000000000181c02190004746573741c02190003666f6f1c020000020004';
  62                 $this->assertEquals( $expected, bin2hex( $res['PSIR'][0] ) );
  63         }
  64         public function testXMPExtractionAltAppId() {
  65                 $res = JpegMetadataExtractor::segmentSplitter( $this->filePath . 'jpeg-xmp-alt.jpg' );
  66                 $expected = file_get_contents( $this->filePath . 'jpeg-xmp-psir.xmp' );
  67                 $this->assertEquals( $expected, $res['XMP'] );
  68         }
  69
  70
  71         public function testIPTCHashComparisionNoHash() {
  72                 $segments = JpegMetadataExtractor::segmentSplitter( $this->filePath . 'jpeg-xmp-psir.jpg' );
  73                 $res = JpegMetadataExtractor::doPSIR( $segments['PSIR'][0] );
  74
  75                 $this->assertEquals( 'iptc-no-hash', $res );
  76         }
  77         public function testIPTCHashComparisionBadHash() {
  78                 $segments = JpegMetadataExtractor::segmentSplitter( $this->filePath . 'jpeg-iptc-bad-hash.jpg' );
  79                 $res = JpegMetadataExtractor::doPSIR( $segments['PSIR'][0] );
  80
  81                 $this->assertEquals( 'iptc-bad-hash', $res );
  82         }
  83         public function testIPTCHashComparisionGoodHash() {
  84                 $segments = JpegMetadataExtractor::segmentSplitter( $this->filePath . 'jpeg-iptc-good-hash.jpg' );
  85                 $res = JpegMetadataExtractor::doPSIR( $segments['PSIR'][0] );
  86
  87                 $this->assertEquals( 'iptc-good-hash', $res );
  88         }
  89         public function testExifByteOrder() {
  90                 $res = JpegMetadataExtractor::segmentSplitter( $this->filePath . 'exif-user-comment.jpg' );
  91                 $expected = 'BE';
  92                 $this->assertEquals( $expected, $res['byteOrder'] );
  93         }
  94 }