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<?php
/**
* @todo Could use a test of extended XMP segments. Hard to find programs that
* create example files, and creating my own in vim propbably wouldn't
* serve as a very good "test". (Adobe photoshop probably creates such files
* but it costs money). The implementation of it currently in MediaWiki is based
* solely on reading the standard, without any real world test files.
*/
class JpegMetadataExtractorTest extends MediaWikiTestCase {
public function setUp() {
$this->filePath = dirname( __FILE__ ) . '/../../data/media/';
}
/**
* We also use this test to test padding bytes don't
* screw stuff up
*
* @param $file filename
*
* @dataProvider dataUtf8Comment
*/
public function testUtf8Comment( $file ) {
$res = JpegMetadataExtractor::segmentSplitter( $this->filePath . $file );
$this->assertEquals( array( 'UTF-8 JPEG Comment — ¼' ), $res['COM'] );
}
public function dataUtf8Comment() {
return array(
array( 'jpeg-comment-utf.jpg' ),
array( 'jpeg-padding-even.jpg' ),
array( 'jpeg-padding-odd.jpg' ),
);
}
/** The file is iso-8859-1, but it should get auto converted */
public function testIso88591Comment() {
$res = JpegMetadataExtractor::segmentSplitter( $this->filePath . 'jpeg-comment-iso8859-1.jpg' );
$this->assertEquals( array( 'ISO-8859-1 JPEG Comment - ¼' ), $res['COM'] );
}
/** Comment values that are non-textual (random binary junk) should not be shown.
* The example test file has a comment with a 0x5 byte in it which is a control character
* and considered binary junk for our purposes.
*/
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( array( '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 = '50686f746f73686f7020332e30003842494d04040000000000181c02190004746573741c02190003666f6f1c020000020004';
$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'] );
}
}
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