tests/phpunit/includes/media/PNGMetadataExtractorTest.php

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