tests/phpunit/includes/media/PNGMetadataExtractorTest.php

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