ui/file_manager/image_loader/image_loader_unittest.js

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 /**
   6  * Test case:
   7  * - Source image: 200x50
   8  * - Target: max size is 100x100
   9  */
  10 function testNormalImage() {
  11   var source = new Image();
  12   source.width = 200;
  13   source.height = 50;
  14   var options = {
  15     maxWidth: 100,
  16     maxHeight: 100,
  17     orientation: ImageOrientation.fromDriveOrientation(0)
  18   };
  19   var result = ImageLoader.calculateCopyParameters(source, options);
  20   assertEquals(0, result.source.x);
  21   assertEquals(0, result.source.y);
  22   assertEquals(200, result.source.width);
  23   assertEquals(50, result.source.height);
  24   assertEquals(0, result.target.x);
  25   assertEquals(0, result.target.y);
  26   assertEquals(100, result.target.width);
  27   assertEquals(25, result.target.height);
  28   assertEquals(100, result.canvas.width);
  29   assertEquals(25, result.canvas.height);
  30 };
  31
  32 /**
  33  * Test case:
  34  * - Source image: 50x200 90 deg clock-wise rotated image.
  35  * - Target: max size is 100x100
  36  */
  37 function testRotatedImage() {
  38   var source = new Image();
  39   source.width = 50;
  40   source.height = 200;
  41   var options = {
  42     maxWidth: 100,
  43     maxHeight: 100,
  44     orientation: ImageOrientation.fromDriveOrientation(1)
  45   };
  46   var result = ImageLoader.calculateCopyParameters(source, options);
  47   assertEquals(0, result.source.x);
  48   assertEquals(0, result.source.y);
  49   assertEquals(50, result.source.width);
  50   assertEquals(200, result.source.height);
  51   assertEquals(0, result.target.x);
  52   assertEquals(0, result.target.y);
  53   assertEquals(25, result.target.width);
  54   assertEquals(100, result.target.height);
  55   assertEquals(100, result.canvas.width);
  56   assertEquals(25, result.canvas.height);
  57 }
  58
  59 /**
  60  * Test case:
  61  * - Source image: 800x100
  62  * - Target: 50x50 cropped image.
  63  */
  64 function testCroppedImage() {
  65   var source = new Image();
  66   source.width = 800;
  67   source.height = 100;
  68   var options = {
  69     width: 50,
  70     height: 50,
  71     crop: true,
  72     orientation: ImageOrientation.fromDriveOrientation(0)
  73   };
  74   var result = ImageLoader.calculateCopyParameters(source, options);
  75   assertEquals(350, result.source.x);
  76   assertEquals(0, result.source.y);
  77   assertEquals(100, result.source.width);
  78   assertEquals(100, result.source.height);
  79   assertEquals(0, result.target.x);
  80   assertEquals(0, result.target.y);
  81   assertEquals(50, result.target.width);
  82   assertEquals(50, result.target.height);
  83   assertEquals(50, result.canvas.width);
  84   assertEquals(50, result.canvas.height);
  85 }
  86
  87 /**
  88  * Test case:
  89  * - Source image: 200x25
  90  * - Target: 50x50 cropped image.
  91  */
  92 function testCroppedImageWithResize() {
  93   var source = new Image();
  94   source.width = 200;
  95   source.height = 25;
  96   var options = {
  97     width: 50,
  98     height: 50,
  99     crop: true,
 100     orientation: ImageOrientation.fromDriveOrientation(0)
 101   };
 102   var result = ImageLoader.calculateCopyParameters(source, options);
 103   assertEquals(87, result.source.x);
 104   assertEquals(0, result.source.y);
 105   assertEquals(25, result.source.width);
 106   assertEquals(25, result.source.height);
 107   assertEquals(0, result.target.x);
 108   assertEquals(0, result.target.y);
 109   assertEquals(50, result.target.width);
 110   assertEquals(50, result.target.height);
 111   assertEquals(50, result.canvas.width);
 112   assertEquals(50, result.canvas.height);
 113 }
 114
 115 /**
 116  * Test case:
 117  * - Source image: 20x10
 118  * - Target: 50x50 cropped image.
 119  */
 120 function testCroppedTinyImage() {
 121   var source = new Image();
 122   source.width = 20;
 123   source.height = 10;
 124   var options = {
 125     width: 50,
 126     height: 50,
 127     crop: true,
 128     orientation: ImageOrientation.fromDriveOrientation(0)
 129   };
 130   var result = ImageLoader.calculateCopyParameters(source, options);
 131   assertEquals(5, result.source.x);
 132   assertEquals(0, result.source.y);
 133   assertEquals(10, result.source.width);
 134   assertEquals(10, result.source.height);
 135   assertEquals(0, result.target.x);
 136   assertEquals(0, result.target.y);
 137   assertEquals(50, result.target.width);
 138   assertEquals(50, result.target.height);
 139   assertEquals(50, result.canvas.width);
 140   assertEquals(50, result.canvas.height);
 141 }
 142
 143 /**
 144  * Test case:
 145  * - Source image: 100x400 90 degree clock-wise rotated.
 146  * - Target: 50x50 cropped image
 147  */
 148 function testCroppedRotatedImage() {
 149   var source = new Image();
 150   source.width = 100;
 151   source.height = 400;
 152   var options = {
 153     width: 50,
 154     height: 50,
 155     crop: true,
 156     orientation: ImageOrientation.fromDriveOrientation(1)
 157   };
 158   var result = ImageLoader.calculateCopyParameters(source, options);
 159   assertEquals(0, result.source.x);
 160   assertEquals(150, result.source.y);
 161   assertEquals(100, result.source.width);
 162   assertEquals(100, result.source.height);
 163   assertEquals(0, result.target.x);
 164   assertEquals(0, result.target.y);
 165   assertEquals(50, result.target.width);
 166   assertEquals(50, result.target.height);
 167   assertEquals(50, result.canvas.width);
 168   assertEquals(50, result.canvas.height);
 169 }