JpegMetadataExtractorTest.php

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<?php
class JpegMetadataExtractorTest extends MediaWikiTestCase {
 
    protected $filePath;
 
    protected function setUp() {
        parent::setUp();
 
        $this->filePath = __DIR__ . '/../../data/media/';
    }
 
    public function testUtf8Comment( $file ) {
        $res = JpegMetadataExtractor::segmentSplitter( $this->filePath . $file );
        $this->assertEquals( [ 'UTF-8 JPEG Comment — ¼' ], $res['COM'] );
    }
 
    public static function provideUtf8Comment() {
        return [
            [ 'jpeg-comment-utf.jpg' ],
            [ 'jpeg-padding-even.jpg' ],
            [ 'jpeg-padding-odd.jpg' ],
        ];
    }
 
    public function testIso88591Comment() {
        $res = JpegMetadataExtractor::segmentSplitter( $this->filePath . 'jpeg-comment-iso8859-1.jpg' );
        $this->assertEquals( [ 'ISO-8859-1 JPEG Comment - ¼' ], $res['COM'] );
    }
 
    public function testBinaryCommentStripped() {
        $res = JpegMetadataExtractor::segmentSplitter( $this->filePath . 'jpeg-comment-binary.jpg' );
        $this->assertEmpty( $res['COM'] );
    }
 
    /* Very rarely a file can have multiple comments.
     *   Order of comments is based on order inside the file.
     */
    public function testMultipleComment() {
        $res = JpegMetadataExtractor::segmentSplitter( $this->filePath . 'jpeg-comment-multiple.jpg' );
        $this->assertEquals( [ 'foo', 'bar' ], $res['COM'] );
    }
 
    public function testXMPExtraction() {
        $res = JpegMetadataExtractor::segmentSplitter( $this->filePath . 'jpeg-xmp-psir.jpg' );
        $expected = file_get_contents( $this->filePath . 'jpeg-xmp-psir.xmp' );
        $this->assertEquals( $expected, $res['XMP'] );
    }
 
    public function testPSIRExtraction() {
        $res = JpegMetadataExtractor::segmentSplitter( $this->filePath . 'jpeg-xmp-psir.jpg' );
        $expected = '50686f746f73686f7020332e30003842494d04040000000'
            . '000181c02190004746573741c02190003666f6f1c020000020004';
        $this->assertEquals( $expected, bin2hex( $res['PSIR'][0] ) );
    }
 
    public function testXMPExtractionAltAppId() {
        $res = JpegMetadataExtractor::segmentSplitter( $this->filePath . 'jpeg-xmp-alt.jpg' );
        $expected = file_get_contents( $this->filePath . 'jpeg-xmp-psir.xmp' );
        $this->assertEquals( $expected, $res['XMP'] );
    }
 
    public function testIPTCHashComparisionNoHash() {
        $segments = JpegMetadataExtractor::segmentSplitter( $this->filePath . 'jpeg-xmp-psir.jpg' );
        $res = JpegMetadataExtractor::doPSIR( $segments['PSIR'][0] );
 
        $this->assertEquals( 'iptc-no-hash', $res );
    }
 
    public function testIPTCHashComparisionBadHash() {
        $segments = JpegMetadataExtractor::segmentSplitter( $this->filePath . 'jpeg-iptc-bad-hash.jpg' );
        $res = JpegMetadataExtractor::doPSIR( $segments['PSIR'][0] );
 
        $this->assertEquals( 'iptc-bad-hash', $res );
    }
 
    public function testIPTCHashComparisionGoodHash() {
        $segments = JpegMetadataExtractor::segmentSplitter( $this->filePath . 'jpeg-iptc-good-hash.jpg' );
        $res = JpegMetadataExtractor::doPSIR( $segments['PSIR'][0] );
 
        $this->assertEquals( 'iptc-good-hash', $res );
    }
 
    public function testExifByteOrder() {
        $res = JpegMetadataExtractor::segmentSplitter( $this->filePath . 'exif-user-comment.jpg' );
        $expected = 'BE';
        $this->assertEquals( $expected, $res['byteOrder'] );
    }
 
    public function testInfiniteRead() {
        // test file truncated right after a segment, which previously
        // caused an infinite loop looking for the next segment byte.
        // Should get past infinite loop and throw in wfUnpack()
        $this->setExpectedException( 'MWException' );
        $res = JpegMetadataExtractor::segmentSplitter( $this->filePath . 'jpeg-segment-loop1.jpg' );
    }
 
    public function testInfiniteRead2() {
        // test file truncated after a segment's marker and size, which
        // would cause a seek past end of file. Seek past end of file
        // doesn't actually fail, but prevents further reading and was
        // devolving into the previous case (testInfiniteRead).
        $this->setExpectedException( 'MWException' );
        $res = JpegMetadataExtractor::segmentSplitter( $this->filePath . 'jpeg-segment-loop2.jpg' );
    }
}