tests/phpunit/includes/media/JpegPixelFormatTest.php

   1 <?php
   2 /**
   3  * Tests related to JPEG chroma subsampling via $wgJpegPixelFormat setting.
   4  *
   5  * @group Media
   6  * @group medium
   7  *
   8  * @todo covers tags
   9  */
  10 class JpegPixelFormatTest extends MediaWikiMediaTestCase {
  11
  12         protected function setUp() {
  13                 parent::setUp();
  14         }
  15
  16         /**
  17          * Mark this test as creating thumbnail files.
  18          */
  19         protected function createsThumbnails() {
  20                 return true;
  21         }
  22
  23         /**
  24          *
  25          * @dataProvider providePixelFormats
  26          */
  27         public function testPixelFormatRendering( $sourceFile, $pixelFormat, $samplingFactor ) {
  28                 global $wgUseImageMagick, $wgUseImageResize;
  29                 if ( !$wgUseImageMagick ) {
  30                         $this->markTestSkipped( "This test is only applicable when using ImageMagick thumbnailing" );
  31                 }
  32                 if ( !$wgUseImageResize ) {
  33                         $this->markTestSkipped( "This test is only applicable when using thumbnailing" );
  34                 }
  35
  36                 $fmtStr = var_export( $pixelFormat, true );
  37                 $this->setMwGlobals( 'wgJpegPixelFormat', $pixelFormat );
  38
  39                 $file = $this->dataFile( $sourceFile, 'image/jpeg' );
  40
  41                 $params = [
  42                         'width' => 320,
  43                 ];
  44                 $thumb = $file->transform( $params, File::RENDER_NOW | File::RENDER_FORCE );
  45                 $this->assertTrue( !$thumb->isError(), "created JPEG thumbnail for pixel format $fmtStr" );
  46
  47                 $path = $thumb->getLocalCopyPath();
  48                 $this->assertTrue( is_string( $path ), "path returned for JPEG thumbnail for $fmtStr" );
  49
  50                 $cmd = [
  51                         'identify',
  52                         '-format',
  53                         '%[jpeg:sampling-factor]',
  54                         $path
  55                 ];
  56                 $retval = null;
  57                 $output = wfShellExec( $cmd, $retval );
  58                 $this->assertTrue( $retval === 0, "ImageMagick's identify command should return success" );
  59
  60                 $expected = $samplingFactor;
  61                 $actual = trim( $output );
  62                 $this->assertEquals(
  63                         $expected,
  64                         trim( $output ),
  65                         "IM identify expects JPEG chroma subsampling \"$expected\" for $fmtStr"
  66                 );
  67         }
  68
  69         public static function providePixelFormats() {
  70                 return [
  71                         // From 4:4:4 source file
  72                         [
  73                                 'yuv444.jpg',
  74                                 false,
  75                                 '1x1,1x1,1x1'
  76                         ],
  77                         [
  78                                 'yuv444.jpg',
  79                                 'yuv444',
  80                                 '1x1,1x1,1x1'
  81                         ],
  82                         [
  83                                 'yuv444.jpg',
  84                                 'yuv422',
  85                                 '2x1,1x1,1x1'
  86                         ],
  87                         [
  88                                 'yuv444.jpg',
  89                                 'yuv420',
  90                                 '2x2,1x1,1x1'
  91                         ],
  92                         // From 4:2:0 source file
  93                         [
  94                                 'yuv420.jpg',
  95                                 false,
  96                                 '2x2,1x1,1x1'
  97                         ],
  98                         [
  99                                 'yuv420.jpg',
 100                                 'yuv444',
 101                                 '1x1,1x1,1x1'
 102                         ],
 103                         [
 104                                 'yuv420.jpg',
 105                                 'yuv422',
 106                                 '2x1,1x1,1x1'
 107                         ],
 108                         [
 109                                 'yuv420.jpg',
 110                                 'yuv420',
 111                                 '2x2,1x1,1x1'
 112                         ]
 113                 ];
 114         }
 115 }