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
  56                 $this->assertArrayHasKey( 'text', $meta );
  57                 $meta = $meta['text'];
  58                 $this->assertArrayHasKey( 'Copyright', $meta );
  59                 $this->assertArrayHasKey( 'x-default', $meta['Copyright'] );
  60
  61                 $this->assertEquals( $expected, $meta['Copyright']['x-default'] );
  62         }
  63
  64         /**
  65          * Test extraction of pHYs tags, which can tell what the
  66          * actual resolution of the image is (aka in dots per meter).
  67          */
  68         /*
  69         function testPngPhysTag () {
  70                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
  71                         'Png-native-test.png' );
  72
  73                 $this->assertArrayHasKey( 'text', $meta );
  74                 $meta = $meta['text'];
  75
  76                 $this->assertEquals( '2835/100', $meta['XResolution'] );
  77                 $this->assertEquals( '2835/100', $meta['YResolution'] );
  78                 $this->assertEquals( 3, $meta['ResolutionUnit'] ); // 3 = cm
  79         }
  80         */
  81
  82         /**
  83          * Given a normal static PNG, check the animation metadata returned.
  84          */
  85         function testStaticPngAnimationMetadata() {
  86                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
  87                         'Png-native-test.png' );
  88
  89                 $this->assertEquals( 0, $meta['frameCount'] );
  90                 $this->assertEquals( 1, $meta['loopCount'] );
  91                 $this->assertEquals( 0, $meta['duration'] );
  92         }
  93
  94         /**
  95          * Given an animated APNG image file
  96          * check it gets animated metadata right.
  97          */
  98         function testApngAnimationMetadata() {
  99                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
 100                         'Animated_PNG_example_bouncing_beach_ball.png' );
 101
 102                 $this->assertEquals( 20, $meta['frameCount'] );
 103                 // Note loop count of 0 = infinity
 104                 $this->assertEquals( 0, $meta['loopCount'] );
 105                 $this->assertEquals( 1.5, $meta['duration'], '', 0.00001 );
 106         }
 107
 108         function testPngBitDepth8() {
 109                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
 110                         'Png-native-test.png' );
 111
 112                 $this->assertEquals( 8, $meta['bitDepth'] );
 113         }
 114
 115         function testPngBitDepth1() {
 116                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
 117                         '1bit-png.png' );
 118                 $this->assertEquals( 1, $meta['bitDepth'] );
 119         }
 120
 121
 122         function testPngIndexColour() {
 123                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
 124                         'Png-native-test.png' );
 125
 126                 $this->assertEquals( 'index-coloured', $meta['colorType'] );
 127         }
 128
 129         function testPngRgbColour() {
 130                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
 131                         'rgb-png.png' );
 132                 $this->assertEquals( 'truecolour-alpha', $meta['colorType'] );
 133         }
 134
 135         function testPngRgbNoAlphaColour() {
 136                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
 137                         'rgb-na-png.png' );
 138                 $this->assertEquals( 'truecolour', $meta['colorType'] );
 139         }
 140
 141         function testPngGreyscaleColour() {
 142                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
 143                         'greyscale-png.png' );
 144                 $this->assertEquals( 'greyscale-alpha', $meta['colorType'] );
 145         }
 146
 147         function testPngGreyscaleNoAlphaColour() {
 148                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
 149                         'greyscale-na-png.png' );
 150                 $this->assertEquals( 'greyscale', $meta['colorType'] );
 151         }
 152
 153 }