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'] );
    }
}