tests/phpunit/includes/media/PNGMetadataExtractorTest.php

   1 <?php
   2 class PNGMetadataExtractorTest extends MediaWikiTestCase {
   3         /**
   4          * Tests zTXt tag (compressed textual metadata)
   5          */
   6         function testPNGNativetzTXt() {
   7                 $meta = PNGMetadataExtractor::getMetadata( dirname( __FILE__ ) .
   8                         '/Png-native-test.png' );
   9                 $expected = "foo bar baz foo foo foo foof foo foo foo foo";
  10                 $this->assertArrayHasKey( 'text', $meta );
  11                 $meta = $meta['text'];
  12                 $this->assertArrayHasKey( 'Make', $meta );
  13                 $this->assertArrayHasKey( 'x-default', $meta['Make'] );
  14
  15                 $this->assertEquals( $expected, $meta['Make']['x-default'] );
  16         }
  17
  18         /**
  19          * Test tEXt tag (Uncompressed textual metadata)
  20          */
  21         function testPNGNativetEXt() {
  22                 $meta = PNGMetadataExtractor::getMetadata( dirname( __FILE__ ) .
  23                         '/Png-native-test.png' );
  24                 $expected = "Some long image desc";
  25                 $this->assertArrayHasKey( 'text', $meta );
  26                 $meta = $meta['text'];
  27                 $this->assertArrayHasKey( 'ImageDescription', $meta );
  28                 $this->assertArrayHasKey( 'x-default', $meta['ImageDescription'] );
  29                 $this->assertArrayHasKey( '_type', $meta['ImageDescription'] );
  30
  31                 $this->assertEquals( $expected, $meta['ImageDescription']['x-default'] );
  32         }
  33
  34         /**
  35          * tEXt tags must be encoded iso-8859-1 (vs iTXt which are utf-8)
  36          * Make sure non-ascii characters get converted properly
  37          */
  38         function testPNGNativettEXtNonASCII() {
  39                 $meta = PNGMetadataExtractor::getMetadata( dirname( __FILE__ ) .
  40                         '/Png-native-test.png' );
  41
  42                 // Note the Copyright symbol here is a utf-8 one
  43                 // (aka \xC2\xA9) where in the file its iso-8859-1
  44                 // encoded as just \xA9.
  45                 $expected = "© 2010 Bawolff";
  46
  47
  48                 $this->assertArrayHasKey( 'text', $meta );
  49                 $meta = $meta['text'];
  50                 $this->assertArrayHasKey( 'Copyright', $meta );
  51                 $this->assertArrayHasKey( 'x-default', $meta['Copyright'] );
  52
  53                 $this->assertEquals( $expected, $meta['Copyright']['x-default'] );
  54         }
  55
  56         /**
  57          * Test extraction of pHYs tags, which can tell what the
  58          * actual resolution of the image is (aka in dots per meter).
  59         function testPNGpHYsTag () {
  60                 $meta = PNGMetadataExtractor::getMetadata( dirname( __FILE__ ) .
  61                         '/Png-native-test.png' );
  62
  63                 $this->assertArrayHasKey( 'text', $meta );
  64                 $meta = $meta['text'];
  65
  66                 $this->assertEquals( '2835/100', $meta['XResolution'] );
  67                 $this->assertEquals( '2835/100', $meta['YResolution'] );
  68                 $this->assertEquals( 3, $meta['ResolutionUnit'] ); // 3 = cm
  69         }
  70
  71         /**
  72          * Given a normal static PNG, check the animation metadata returned.
  73          */
  74         function testStaticPNGAnimationMetadata() {
  75                 $meta = PNGMetadataExtractor::getMetadata( dirname( __FILE__ ) .
  76                         '/Png-native-test.png' );
  77
  78                 $this->assertEquals( 0, $meta['frameCount'] );
  79                 $this->assertEquals( 1, $meta['loopCount'] );
  80                 $this->assertEquals( 0, $meta['duration'] );
  81         }
  82
  83         /**
  84          * Given an animated APNG image file
  85          * check it gets animated metadata right.
  86          */
  87         function testAPNGAnimationMetadata() {
  88                 $meta = PNGMetadataExtractor::getMetadata( dirname( __FILE__ ) .
  89                         '/Animated_PNG_example_bouncing_beach_ball.png' );
  90
  91                 $this->assertEquals( 20, $meta['frameCount'] );
  92                 // Note loop count of 0 = infinity
  93                 $this->assertEquals( 0, $meta['loopCount'] );
  94                 $this->assertEquals( 1.5, $meta['duration'], '', 0.00001 );
  95         }
  96
  97         function testPNGBitDepth8() {
  98                 $meta = PNGMetadataExtractor::getMetadata( dirname( __FILE__ ) .
  99                         '/Png-native-test.png' );
 100
 101                 $this->assertEquals( 8, $meta['bitDepth'] );
 102         }
 103         function testPNGBitDepth1() {
 104                 $meta = PNGMetadataExtractor::getMetadata( dirname( __FILE__ ) .
 105                         '/1bit-png.png' );
 106                 $this->assertEquals( 1, $meta['bitDepth'] );
 107         }
 108
 109
 110         function testPNGindexColour() {
 111                 $meta = PNGMetadataExtractor::getMetadata( dirname( __FILE__ ) .
 112                         '/Png-native-test.png' );
 113
 114                 $this->assertEquals( 'index-coloured', $meta['colorType'] );
 115         }
 116         function testPNGrgbColour() {
 117                 $meta = PNGMetadataExtractor::getMetadata( dirname( __FILE__ ) .
 118                         '/rgb-png.png' );
 119                 $this->assertEquals( 'truecolour-alpha', $meta['colorType'] );
 120         }
 121         function testPNGrgbNoAlphaColour() {
 122                 $meta = PNGMetadataExtractor::getMetadata( dirname( __FILE__ ) .
 123                         '/rgb-na-png.png' );
 124                 $this->assertEquals( 'truecolour', $meta['colorType'] );
 125         }
 126         function testPNGgreyscaleColour() {
 127                 $meta = PNGMetadataExtractor::getMetadata( dirname( __FILE__ ) .
 128                         '/greyscale-png.png' );
 129                 $this->assertEquals( 'greyscale-alpha', $meta['colorType'] );
 130         }
 131         function testPNGgreyscaleNoAlphaColour() {
 132                 $meta = PNGMetadataExtractor::getMetadata( dirname( __FILE__ ) .
 133                         '/greyscale-na-png.png' );
 134                 $this->assertEquals( 'greyscale', $meta['colorType'] );
 135         }
 136
 137
 138 }