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 namespace core;
  18
  19 /**
  20  * A set of tests for some of the gd functionality within Moodle.
  21  *
  22  * @package    core
  23  * @category   test
  24  * @copyright  2015 Andrew Nicols <andrew@nicols.co.uk>
  25  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  26  */
  27 class gdlib_test extends \basic_testcase {
  28
  29     private $fixturepath = null;
  30
  31     public function setUp(): void {
  32         $this->fixturepath = __DIR__ . DIRECTORY_SEPARATOR . 'fixtures' . DIRECTORY_SEPARATOR;
  33     }
  34
  35     public function test_generate_image_thumbnail() {
  36         global $CFG;
  37         require_once($CFG->libdir . '/gdlib.php');
  38
  39         // Test with meaningless data.
  40
  41         // Now use a fixture.
  42         $pngpath = $this->fixturepath . 'gd-logo.png';
  43         $pngthumb = generate_image_thumbnail($pngpath, 24, 24);
  44         $this->assertTrue(is_string($pngthumb));
  45
  46         // And check that the generated image was of the correct proportions and mimetype.
  47         $imageinfo = getimagesizefromstring($pngthumb);
  48         $this->assertEquals(24, $imageinfo[0]);
  49         $this->assertEquals(24, $imageinfo[1]);
  50         $this->assertEquals('image/png', $imageinfo['mime']);
  51     }
  52
  53     public function test_generate_image_thumbnail_from_string() {
  54         global $CFG;
  55         require_once($CFG->libdir . '/gdlib.php');
  56
  57         // Test with meaningless data.
  58
  59         // First empty values.
  60         $this->assertFalse(generate_image_thumbnail_from_string('', 24, 24));
  61         $this->assertFalse(generate_image_thumbnail_from_string('invalid', 0, 24));
  62         $this->assertFalse(generate_image_thumbnail_from_string('invalid', 24, 0));
  63
  64         // Now an invalid string.
  65         $this->assertFalse(generate_image_thumbnail_from_string('invalid', 24, 24));
  66
  67         // Now use a fixture.
  68         $pngpath = $this->fixturepath . 'gd-logo.png';
  69         $pngdata = file_get_contents($pngpath);
  70         $pngthumb = generate_image_thumbnail_from_string($pngdata, 24, 24);
  71         $this->assertTrue(is_string($pngthumb));
  72
  73         // And check that the generated image was of the correct proportions and mimetype.
  74         $imageinfo = getimagesizefromstring($pngthumb);
  75         $this->assertEquals(24, $imageinfo[0]);
  76         $this->assertEquals(24, $imageinfo[1]);
  77         $this->assertEquals('image/png', $imageinfo['mime']);
  78     }
  79
  80     public function test_resize_image() {
  81         global $CFG;
  82         require_once($CFG->libdir . '/gdlib.php');
  83
  84         $pngpath = $this->fixturepath . 'gd-logo.png';
  85
  86         // Preferred height.
  87         $newpng = resize_image($pngpath, null, 24);
  88         $this->assertTrue(is_string($newpng));
  89         $imageinfo = getimagesizefromstring($newpng);
  90         $this->assertEquals(89, $imageinfo[0]);
  91         $this->assertEquals(24, $imageinfo[1]);
  92         $this->assertEquals('image/png', $imageinfo['mime']);
  93
  94         // Preferred width.
  95         $newpng = resize_image($pngpath, 100, null);
  96         $this->assertTrue(is_string($newpng));
  97         $imageinfo = getimagesizefromstring($newpng);
  98         $this->assertEquals(100, $imageinfo[0]);
  99         $this->assertEquals(26, $imageinfo[1]);
 100         $this->assertEquals('image/png', $imageinfo['mime']);
 101
 102         // Preferred width and height.
 103         $newpng = resize_image($pngpath, 50, 50);
 104         $this->assertTrue(is_string($newpng));
 105         $imageinfo = getimagesizefromstring($newpng);
 106         $this->assertEquals(50, $imageinfo[0]);
 107         $this->assertEquals(13, $imageinfo[1]);
 108         $this->assertEquals('image/png', $imageinfo['mime']);
 109     }
 110
 111     public function test_resize_image_from_image() {
 112         global $CFG;
 113         require_once($CFG->libdir . '/gdlib.php');
 114
 115         $pngpath = $this->fixturepath . 'gd-logo.png';
 116         $origimageinfo = getimagesize($pngpath);
 117         $imagecontent = file_get_contents($pngpath);
 118
 119         // Preferred height.
 120         $imageresource = imagecreatefromstring($imagecontent);
 121         $newpng = resize_image_from_image($imageresource, $origimageinfo, null, 24);
 122         $this->assertTrue(is_string($newpng));
 123         $imageinfo = getimagesizefromstring($newpng);
 124         $this->assertEquals(89, $imageinfo[0]);
 125         $this->assertEquals(24, $imageinfo[1]);
 126         $this->assertEquals('image/png', $imageinfo['mime']);
 127
 128         // Preferred width.
 129         $imageresource = imagecreatefromstring($imagecontent);
 130         $newpng = resize_image_from_image($imageresource, $origimageinfo, 100, null);
 131         $this->assertTrue(is_string($newpng));
 132         $imageinfo = getimagesizefromstring($newpng);
 133         $this->assertEquals(100, $imageinfo[0]);
 134         $this->assertEquals(26, $imageinfo[1]);
 135         $this->assertEquals('image/png', $imageinfo['mime']);
 136
 137         // Preferred width and height.
 138         $imageresource = imagecreatefromstring($imagecontent);
 139         $newpng = resize_image_from_image($imageresource, $origimageinfo, 50, 50);
 140         $this->assertTrue(is_string($newpng));
 141         $imageinfo = getimagesizefromstring($newpng);
 142         $this->assertEquals(50, $imageinfo[0]);
 143         $this->assertEquals(13, $imageinfo[1]);
 144         $this->assertEquals('image/png', $imageinfo['mime']);
 145     }
 146
 147 }