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