tests/phpunit/includes/media/PNGMetadataExtractorTest.php

   1 <?php
   2 class PNGMetadataExtractorTest extends MediaWikiTestCase {
   3
   4         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         function testPngPhysTag () {
  64                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
  65                         'Png-native-test.png' );
  66
  67                 $this->assertArrayHasKey( 'text', $meta );
  68                 $meta = $meta['text'];
  69
  70                 $this->assertEquals( '2835/100', $meta['XResolution'] );
  71                 $this->assertEquals( '2835/100', $meta['YResolution'] );
  72                 $this->assertEquals( 3, $meta['ResolutionUnit'] ); // 3 = cm
  73         }
  74
  75         /**
  76          * Given a normal static PNG, check the animation metadata returned.
  77          */
  78         function testStaticPngAnimationMetadata() {
  79                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
  80                         'Png-native-test.png' );
  81
  82                 $this->assertEquals( 0, $meta['frameCount'] );
  83                 $this->assertEquals( 1, $meta['loopCount'] );
  84                 $this->assertEquals( 0, $meta['duration'] );
  85         }
  86
  87         /**
  88          * Given an animated APNG image file
  89          * check it gets animated metadata right.
  90          */
  91         function testApngAnimationMetadata() {
  92                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
  93                         'Animated_PNG_example_bouncing_beach_ball.png' );
  94
  95                 $this->assertEquals( 20, $meta['frameCount'] );
  96                 // Note loop count of 0 = infinity
  97                 $this->assertEquals( 0, $meta['loopCount'] );
  98                 $this->assertEquals( 1.5, $meta['duration'], '', 0.00001 );
  99         }
 100
 101         function testPngBitDepth8() {
 102                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
 103                         'Png-native-test.png' );
 104
 105                 $this->assertEquals( 8, $meta['bitDepth'] );
 106         }
 107         function testPngBitDepth1() {
 108                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
 109                         '1bit-png.png' );
 110                 $this->assertEquals( 1, $meta['bitDepth'] );
 111         }
 112
 113
 114         function testPngIndexColour() {
 115                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
 116                         'Png-native-test.png' );
 117
 118                 $this->assertEquals( 'index-coloured', $meta['colorType'] );
 119         }
 120         function testPngRgbColour() {
 121                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
 122                         'rgb-png.png' );
 123                 $this->assertEquals( 'truecolour-alpha', $meta['colorType'] );
 124         }
 125         function testPngRgbNoAlphaColour() {
 126                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
 127                         'rgb-na-png.png' );
 128                 $this->assertEquals( 'truecolour', $meta['colorType'] );
 129         }
 130         function testPngGreyscaleColour() {
 131                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
 132                         'greyscale-png.png' );
 133                 $this->assertEquals( 'greyscale-alpha', $meta['colorType'] );
 134         }
 135         function testPngGreyscaleNoAlphaColour() {
 136                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
 137                         'greyscale-na-png.png' );
 138                 $this->assertEquals( 'greyscale', $meta['colorType'] );
 139         }
 140
 141 }