tests/phpunit/includes/media/PNGMetadataExtractorTest.php

   1 <?php
   2
   3 /**
   4  * @group Media
   5  * @covers PNGMetadataExtractor
   6  */
   7 class PNGMetadataExtractorTest extends MediaWikiTestCase {
   8
   9         protected function setUp() {
  10                 parent::setUp();
  11                 $this->filePath = __DIR__ . '/../../data/media/';
  12         }
  13
  14         /**
  15          * Tests zTXt tag (compressed textual metadata)
  16          */
  17         public function testPngNativetZtxt() {
  18                 $this->checkPHPExtension( 'zlib' );
  19
  20                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
  21                         'Png-native-test.png' );
  22                 $expected = "foo bar baz foo foo foo foof foo foo foo foo";
  23                 $this->assertArrayHasKey( 'text', $meta );
  24                 $meta = $meta['text'];
  25                 $this->assertArrayHasKey( 'Make', $meta );
  26                 $this->assertArrayHasKey( 'x-default', $meta['Make'] );
  27
  28                 $this->assertEquals( $expected, $meta['Make']['x-default'] );
  29         }
  30
  31         /**
  32          * Test tEXt tag (Uncompressed textual metadata)
  33          */
  34         public function testPngNativeText() {
  35                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
  36                         'Png-native-test.png' );
  37                 $expected = "Some long image desc";
  38                 $this->assertArrayHasKey( 'text', $meta );
  39                 $meta = $meta['text'];
  40                 $this->assertArrayHasKey( 'ImageDescription', $meta );
  41                 $this->assertArrayHasKey( 'x-default', $meta['ImageDescription'] );
  42                 $this->assertArrayHasKey( '_type', $meta['ImageDescription'] );
  43
  44                 $this->assertEquals( $expected, $meta['ImageDescription']['x-default'] );
  45         }
  46
  47         /**
  48          * tEXt tags must be encoded iso-8859-1 (vs iTXt which are utf-8)
  49          * Make sure non-ascii characters get converted properly
  50          */
  51         public function testPngNativeTextNonAscii() {
  52                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
  53                         'Png-native-test.png' );
  54
  55                 // Note the Copyright symbol here is a utf-8 one
  56                 // (aka \xC2\xA9) where in the file its iso-8859-1
  57                 // encoded as just \xA9.
  58                 $expected = "© 2010 Bawolff";
  59
  60                 $this->assertArrayHasKey( 'text', $meta );
  61                 $meta = $meta['text'];
  62                 $this->assertArrayHasKey( 'Copyright', $meta );
  63                 $this->assertArrayHasKey( 'x-default', $meta['Copyright'] );
  64
  65                 $this->assertEquals( $expected, $meta['Copyright']['x-default'] );
  66         }
  67
  68         /**
  69          * Test extraction of pHYs tags, which can tell what the
  70          * actual resolution of the image is (aka in dots per meter).
  71          */
  72         /*
  73         public function testPngPhysTag() {
  74                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
  75                         'Png-native-test.png' );
  76
  77                 $this->assertArrayHasKey( 'text', $meta );
  78                 $meta = $meta['text'];
  79
  80                 $this->assertEquals( '2835/100', $meta['XResolution'] );
  81                 $this->assertEquals( '2835/100', $meta['YResolution'] );
  82                 $this->assertEquals( 3, $meta['ResolutionUnit'] ); // 3 = cm
  83         }
  84         */
  85
  86         /**
  87          * Given a normal static PNG, check the animation metadata returned.
  88          */
  89         public function testStaticPngAnimationMetadata() {
  90                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
  91                         'Png-native-test.png' );
  92
  93                 $this->assertEquals( 0, $meta['frameCount'] );
  94                 $this->assertEquals( 1, $meta['loopCount'] );
  95                 $this->assertEquals( 0, $meta['duration'] );
  96         }
  97
  98         /**
  99          * Given an animated APNG image file
 100          * check it gets animated metadata right.
 101          */
 102         public function testApngAnimationMetadata() {
 103                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
 104                         'Animated_PNG_example_bouncing_beach_ball.png' );
 105
 106                 $this->assertEquals( 20, $meta['frameCount'] );
 107                 // Note loop count of 0 = infinity
 108                 $this->assertEquals( 0, $meta['loopCount'] );
 109                 $this->assertEquals( 1.5, $meta['duration'], '', 0.00001 );
 110         }
 111
 112         public function testPngBitDepth8() {
 113                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
 114                         'Png-native-test.png' );
 115
 116                 $this->assertEquals( 8, $meta['bitDepth'] );
 117         }
 118
 119         public function testPngBitDepth1() {
 120                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
 121                         '1bit-png.png' );
 122                 $this->assertEquals( 1, $meta['bitDepth'] );
 123         }
 124
 125         public function testPngIndexColour() {
 126                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
 127                         'Png-native-test.png' );
 128
 129                 $this->assertEquals( 'index-coloured', $meta['colorType'] );
 130         }
 131
 132         public function testPngRgbColour() {
 133                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
 134                         'rgb-png.png' );
 135                 $this->assertEquals( 'truecolour-alpha', $meta['colorType'] );
 136         }
 137
 138         public function testPngRgbNoAlphaColour() {
 139                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
 140                         'rgb-na-png.png' );
 141                 $this->assertEquals( 'truecolour', $meta['colorType'] );
 142         }
 143
 144         public function testPngGreyscaleColour() {
 145                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
 146                         'greyscale-png.png' );
 147                 $this->assertEquals( 'greyscale-alpha', $meta['colorType'] );
 148         }
 149
 150         public function testPngGreyscaleNoAlphaColour() {
 151                 $meta = PNGMetadataExtractor::getMetadata( $this->filePath .
 152                         'greyscale-na-png.png' );
 153                 $this->assertEquals( 'greyscale', $meta['colorType'] );
 154         }
 155 }