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          * Tests zTXt tag (compressed textual metadata)
  10          */
  11         function testPngNativetZtxt() {
  12                 $this->checkPHPExtension( 'zlib' );
  13
  14                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
  15                         'Png-native-test.png' );
  16                 $expected = "foo bar baz foo foo foo foof foo foo foo foo";
  17                 $this->assertArrayHasKey( 'text', $meta );
  18                 $meta = $meta['text'];
  19                 $this->assertArrayHasKey( 'Make', $meta );
  20                 $this->assertArrayHasKey( 'x-default', $meta['Make'] );
  21
  22                 $this->assertEquals( $expected, $meta['Make']['x-default'] );
  23         }
  24
  25         /**
  26          * Test tEXt tag (Uncompressed textual metadata)
  27          */
  28         function testPngNativeText() {
  29                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
  30                         'Png-native-test.png' );
  31                 $expected = "Some long image desc";
  32                 $this->assertArrayHasKey( 'text', $meta );
  33                 $meta = $meta['text'];
  34                 $this->assertArrayHasKey( 'ImageDescription', $meta );
  35                 $this->assertArrayHasKey( 'x-default', $meta['ImageDescription'] );
  36                 $this->assertArrayHasKey( '_type', $meta['ImageDescription'] );
  37
  38                 $this->assertEquals( $expected, $meta['ImageDescription']['x-default'] );
  39         }
  40
  41         /**
  42          * tEXt tags must be encoded iso-8859-1 (vs iTXt which are utf-8)
  43          * Make sure non-ascii characters get converted properly
  44          */
  45         function testPngNativeTextNonAscii() {
  46                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
  47                         'Png-native-test.png' );
  48
  49                 // Note the Copyright symbol here is a utf-8 one
  50                 // (aka \xC2\xA9) where in the file its iso-8859-1
  51                 // encoded as just \xA9.
  52                 $expected = "© 2010 Bawolff";
  53
  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         function testPngBitDepth1() {
 114                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
 115                         '1bit-png.png' );
 116                 $this->assertEquals( 1, $meta['bitDepth'] );
 117         }
 118
 119
 120         function testPngIndexColour() {
 121                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
 122                         'Png-native-test.png' );
 123
 124                 $this->assertEquals( 'index-coloured', $meta['colorType'] );
 125         }
 126         function testPngRgbColour() {
 127                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
 128                         'rgb-png.png' );
 129                 $this->assertEquals( 'truecolour-alpha', $meta['colorType'] );
 130         }
 131         function testPngRgbNoAlphaColour() {
 132                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
 133                         'rgb-na-png.png' );
 134                 $this->assertEquals( 'truecolour', $meta['colorType'] );
 135         }
 136         function testPngGreyscaleColour() {
 137                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
 138                         'greyscale-png.png' );
 139                 $this->assertEquals( 'greyscale-alpha', $meta['colorType'] );
 140         }
 141         function testPngGreyscaleNoAlphaColour() {
 142                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
 143                         'greyscale-na-png.png' );
 144                 $this->assertEquals( 'greyscale', $meta['colorType'] );
 145         }
 146
 147 }