tests/phpunit/includes/media/PNGMetadataExtractorTest.php

   1 <?php
   2 class PNGMetadataExtractorTest extends MediaWikiTestCase {
   3
   4         protected function setUp() {
   5                 parent::setUp();
   6                 $this->filePath = __DIR__ . '/../../data/media/';
   7         }
   8
   9         /**
  10          * Tests zTXt tag (compressed textual metadata)
  11          */
  12         function testPngNativetZtxt() {
  13                 $this->checkPHPExtension( 'zlib' );
  14
  15                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
  16                         'Png-native-test.png' );
  17                 $expected = "foo bar baz foo foo foo foof foo foo foo foo";
  18                 $this->assertArrayHasKey( 'text', $meta );
  19                 $meta = $meta['text'];
  20                 $this->assertArrayHasKey( 'Make', $meta );
  21                 $this->assertArrayHasKey( 'x-default', $meta['Make'] );
  22
  23                 $this->assertEquals( $expected, $meta['Make']['x-default'] );
  24         }
  25
  26         /**
  27          * Test tEXt tag (Uncompressed textual metadata)
  28          */
  29         function testPngNativeText() {
  30                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
  31                         'Png-native-test.png' );
  32                 $expected = "Some long image desc";
  33                 $this->assertArrayHasKey( 'text', $meta );
  34                 $meta = $meta['text'];
  35                 $this->assertArrayHasKey( 'ImageDescription', $meta );
  36                 $this->assertArrayHasKey( 'x-default', $meta['ImageDescription'] );
  37                 $this->assertArrayHasKey( '_type', $meta['ImageDescription'] );
  38
  39                 $this->assertEquals( $expected, $meta['ImageDescription']['x-default'] );
  40         }
  41
  42         /**
  43          * tEXt tags must be encoded iso-8859-1 (vs iTXt which are utf-8)
  44          * Make sure non-ascii characters get converted properly
  45          */
  46         function testPngNativeTextNonAscii() {
  47                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
  48                         'Png-native-test.png' );
  49
  50                 // Note the Copyright symbol here is a utf-8 one
  51                 // (aka \xC2\xA9) where in the file its iso-8859-1
  52                 // encoded as just \xA9.
  53                 $expected = "© 2010 Bawolff";
  54
  55                 $this->assertArrayHasKey( 'text', $meta );
  56                 $meta = $meta['text'];
  57                 $this->assertArrayHasKey( 'Copyright', $meta );
  58                 $this->assertArrayHasKey( 'x-default', $meta['Copyright'] );
  59
  60                 $this->assertEquals( $expected, $meta['Copyright']['x-default'] );
  61         }
  62
  63         /**
  64          * Test extraction of pHYs tags, which can tell what the
  65          * actual resolution of the image is (aka in dots per meter).
  66          */
  67         /*
  68         function testPngPhysTag() {
  69                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
  70                         'Png-native-test.png' );
  71
  72                 $this->assertArrayHasKey( 'text', $meta );
  73                 $meta = $meta['text'];
  74
  75                 $this->assertEquals( '2835/100', $meta['XResolution'] );
  76                 $this->assertEquals( '2835/100', $meta['YResolution'] );
  77                 $this->assertEquals( 3, $meta['ResolutionUnit'] ); // 3 = cm
  78         }
  79         */
  80
  81         /**
  82          * Given a normal static PNG, check the animation metadata returned.
  83          */
  84         function testStaticPngAnimationMetadata() {
  85                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
  86                         'Png-native-test.png' );
  87
  88                 $this->assertEquals( 0, $meta['frameCount'] );
  89                 $this->assertEquals( 1, $meta['loopCount'] );
  90                 $this->assertEquals( 0, $meta['duration'] );
  91         }
  92
  93         /**
  94          * Given an animated APNG image file
  95          * check it gets animated metadata right.
  96          */
  97         function testApngAnimationMetadata() {
  98                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
  99                         'Animated_PNG_example_bouncing_beach_ball.png' );
 100
 101                 $this->assertEquals( 20, $meta['frameCount'] );
 102                 // Note loop count of 0 = infinity
 103                 $this->assertEquals( 0, $meta['loopCount'] );
 104                 $this->assertEquals( 1.5, $meta['duration'], '', 0.00001 );
 105         }
 106
 107         function testPngBitDepth8() {
 108                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
 109                         'Png-native-test.png' );
 110
 111                 $this->assertEquals( 8, $meta['bitDepth'] );
 112         }
 113
 114         function testPngBitDepth1() {
 115                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
 116                         '1bit-png.png' );
 117                 $this->assertEquals( 1, $meta['bitDepth'] );
 118         }
 119
 120
 121         function testPngIndexColour() {
 122                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
 123                         'Png-native-test.png' );
 124
 125                 $this->assertEquals( 'index-coloured', $meta['colorType'] );
 126         }
 127
 128         function testPngRgbColour() {
 129                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
 130                         'rgb-png.png' );
 131                 $this->assertEquals( 'truecolour-alpha', $meta['colorType'] );
 132         }
 133
 134         function testPngRgbNoAlphaColour() {
 135                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
 136                         'rgb-na-png.png' );
 137                 $this->assertEquals( 'truecolour', $meta['colorType'] );
 138         }
 139
 140         function testPngGreyscaleColour() {
 141                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
 142                         'greyscale-png.png' );
 143                 $this->assertEquals( 'greyscale-alpha', $meta['colorType'] );
 144         }
 145
 146         function testPngGreyscaleNoAlphaColour() {
 147                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
 148                         'greyscale-na-png.png' );
 149                 $this->assertEquals( 'greyscale', $meta['colorType'] );
 150         }
 151 }