lib/tests/gdlib_test.php

   1 <?php
   2 // This file is part of Moodle - http://moodle.org/
   3 //
   4 // Moodle is free software: you can redistribute it and/or modify
   5 // it under the terms of the GNU General Public License as published by
   6 // the Free Software Foundation, either version 3 of the License, or
   7 // (at your option) any later version.
   8 //
   9 // Moodle is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13 //
  14 // You should have received a copy of the GNU General Public License
  15 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 /**
  18  * Test gd functionality.
  19  *
  20  * @package    core
  21  * @category   phpunit
  22  * @copyright  2015 Andrew Nicols <andrew@nicols.co.uk>
  23  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  24  */
  25
  26 defined('MOODLE_INTERNAL') || die();
  27
  28
  29 /**
  30  * A set of tests for some of the gd functionality within Moodle.
  31  *
  32  * @package    core
  33  * @category   phpunit
  34  * @copyright  2015 Andrew Nicols <andrew@nicols.co.uk>
  35  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  36  */
  37 class core_gdlib_testcase extends basic_testcase {
  38
  39     private $fixturepath = null;
  40
  41     public function setUp() {
  42         $this->fixturepath = __DIR__ . DIRECTORY_SEPARATOR . 'fixtures' . DIRECTORY_SEPARATOR;
  43     }
  44
  45     public function test_generate_image_thumbnail() {
  46         global $CFG;
  47         require_once($CFG->libdir . '/gdlib.php');
  48
  49         // Test with meaningless data.
  50
  51         // Now use a fixture.
  52         $pngpath = $this->fixturepath . 'gd-logo.png';
  53         $pngthumb = generate_image_thumbnail($pngpath, 24, 24);
  54         $this->assertTrue(is_string($pngthumb));
  55
  56         // And check that the generated image was of the correct proportions and mimetype.
  57         $imageinfo = getimagesizefromstring($pngthumb);
  58         $this->assertEquals(24, $imageinfo[0]);
  59         $this->assertEquals(24, $imageinfo[1]);
  60         $this->assertEquals('image/png', $imageinfo['mime']);
  61     }
  62
  63     public function test_generate_image_thumbnail_from_string() {
  64         global $CFG;
  65         require_once($CFG->libdir . '/gdlib.php');
  66
  67         // Test with meaningless data.
  68
  69         // First empty values.
  70         $this->assertFalse(generate_image_thumbnail_from_string('', 24, 24));
  71         $this->assertFalse(generate_image_thumbnail_from_string('invalid', 0, 24));
  72         $this->assertFalse(generate_image_thumbnail_from_string('invalid', 24, 0));
  73
  74         // Now an invalid string.
  75         $this->assertFalse(generate_image_thumbnail_from_string('invalid', 24, 24));
  76
  77         // Now use a fixture.
  78         $pngpath = $this->fixturepath . 'gd-logo.png';
  79         $pngdata = file_get_contents($pngpath);
  80         $pngthumb = generate_image_thumbnail_from_string($pngdata, 24, 24);
  81         $this->assertTrue(is_string($pngthumb));
  82
  83         // And check that the generated image was of the correct proportions and mimetype.
  84         $imageinfo = getimagesizefromstring($pngthumb);
  85         $this->assertEquals(24, $imageinfo[0]);
  86         $this->assertEquals(24, $imageinfo[1]);
  87         $this->assertEquals('image/png', $imageinfo['mime']);
  88     }
  89
  90     public function test_resize_image() {
  91         global $CFG;
  92         require_once($CFG->libdir . '/gdlib.php');
  93
  94         $pngpath = $this->fixturepath . 'gd-logo.png';
  95
  96         // Preferred height.
  97         $newpng = resize_image($pngpath, null, 24);
  98         $this->assertTrue(is_string($newpng));
  99         $imageinfo = getimagesizefromstring($newpng);
 100         $this->assertEquals(89, $imageinfo[0]);
 101         $this->assertEquals(24, $imageinfo[1]);
 102         $this->assertEquals('image/png', $imageinfo['mime']);
 103
 104         // Preferred width.
 105         $newpng = resize_image($pngpath, 100, null);
 106         $this->assertTrue(is_string($newpng));
 107         $imageinfo = getimagesizefromstring($newpng);
 108         $this->assertEquals(100, $imageinfo[0]);
 109         $this->assertEquals(26, $imageinfo[1]);
 110         $this->assertEquals('image/png', $imageinfo['mime']);
 111
 112         // Preferred width and height.
 113         $newpng = resize_image($pngpath, 50, 50);
 114         $this->assertTrue(is_string($newpng));
 115         $imageinfo = getimagesizefromstring($newpng);
 116         $this->assertEquals(50, $imageinfo[0]);
 117         $this->assertEquals(13, $imageinfo[1]);
 118         $this->assertEquals('image/png', $imageinfo['mime']);
 119     }
 120
 121     public function test_resize_image_from_image() {
 122         global $CFG;
 123         require_once($CFG->libdir . '/gdlib.php');
 124
 125         $pngpath = $this->fixturepath . 'gd-logo.png';
 126         $origimageinfo = getimagesize($pngpath);
 127         $imagecontent = file_get_contents($pngpath);
 128
 129         // Preferred height.
 130         $imageresource = imagecreatefromstring($imagecontent);
 131         $newpng = resize_image_from_image($imageresource, $origimageinfo, null, 24);
 132         $this->assertTrue(is_string($newpng));
 133         $imageinfo = getimagesizefromstring($newpng);
 134         $this->assertEquals(89, $imageinfo[0]);
 135         $this->assertEquals(24, $imageinfo[1]);
 136         $this->assertEquals('image/png', $imageinfo['mime']);
 137
 138         // Preferred width.
 139         $imageresource = imagecreatefromstring($imagecontent);
 140         $newpng = resize_image_from_image($imageresource, $origimageinfo, 100, null);
 141         $this->assertTrue(is_string($newpng));
 142         $imageinfo = getimagesizefromstring($newpng);
 143         $this->assertEquals(100, $imageinfo[0]);
 144         $this->assertEquals(26, $imageinfo[1]);
 145         $this->assertEquals('image/png', $imageinfo['mime']);
 146
 147         // Preferred width and height.
 148         $imageresource = imagecreatefromstring($imagecontent);
 149         $newpng = resize_image_from_image($imageresource, $origimageinfo, 50, 50);
 150         $this->assertTrue(is_string($newpng));
 151         $imageinfo = getimagesizefromstring($newpng);
 152         $this->assertEquals(50, $imageinfo[0]);
 153         $this->assertEquals(13, $imageinfo[1]);
 154         $this->assertEquals('image/png', $imageinfo['mime']);
 155     }
 156
 157 }