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Differences Between: [Versions 310 and 402] [Versions 311 and 402] [Versions 39 and 402]

   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 qtype_numerical;
  18  
  19  use qtype_numerical_answer;
  20  
  21  defined('MOODLE_INTERNAL') || die();
  22  
  23  global $CFG;
  24  require_once($CFG->dirroot . '/question/engine/tests/helpers.php');
  25  require_once($CFG->dirroot . '/question/type/numerical/question.php');
  26  
  27  /**
  28   * Unit tests for the numerical question definition class.
  29   *
  30   * @package   qtype_numerical
  31   * @category  test
  32   * @copyright 2008 The Open University
  33   * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  34   */
  35  class answer_test extends \advanced_testcase {
  36      public function test_within_tolerance_nominal() {
  37          $answer = new qtype_numerical_answer(13, 7.0, 1.0, '', FORMAT_MOODLE, 1.0);
  38  
  39          $this->assertFalse($answer->within_tolerance(5.99));
  40          $this->assertTrue($answer->within_tolerance(6));
  41          $this->assertTrue($answer->within_tolerance(7));
  42          $this->assertTrue($answer->within_tolerance(8));
  43          $this->assertFalse($answer->within_tolerance(8.01));
  44      }
  45  
  46      public function test_within_tolerance_nominal_zero() {
  47          // Either an answer or tolerance of 0 requires special care. We still
  48          // don't want to end up comparing two floats for absolute equality.
  49  
  50          // Zero tol, non-zero answer.
  51          $answer = new qtype_numerical_answer(13, 1e-20, 1.0, '', FORMAT_MOODLE, 0.0);
  52          $this->assertFalse($answer->within_tolerance(0.9999999e-20));
  53          $this->assertTrue($answer->within_tolerance(1e-20));
  54          $this->assertFalse($answer->within_tolerance(1.0000001e-20));
  55  
  56          // Non-zero tol, zero answer.
  57          $answer = new qtype_numerical_answer(13, 0.0, 1.0, '', FORMAT_MOODLE, 1e-24);
  58          $this->assertFalse($answer->within_tolerance(-2e-24));
  59          $this->assertTrue($answer->within_tolerance(-1e-24));
  60          $this->assertTrue($answer->within_tolerance(0));
  61          $this->assertTrue($answer->within_tolerance(1e-24));
  62          $this->assertFalse($answer->within_tolerance(2e-24));
  63  
  64          // Zero tol, zero answer.
  65          $answer = new qtype_numerical_answer(13, 0.0, 1.0, '', FORMAT_MOODLE, 1e-24);
  66          $this->assertFalse($answer->within_tolerance(-1e-20));
  67          $this->assertTrue($answer->within_tolerance(-1e-35));
  68          $this->assertTrue($answer->within_tolerance(0));
  69          $this->assertTrue($answer->within_tolerance(1e-35));
  70          $this->assertFalse($answer->within_tolerance(1e-20));
  71  
  72          // Non-zero tol, non-zero answer.
  73          $answer = new qtype_numerical_answer(13, 1e-20, 1.0, '', FORMAT_MOODLE, 1e-24);
  74          $this->assertFalse($answer->within_tolerance(1.0002e-20));
  75          $this->assertTrue($answer->within_tolerance(1.0001e-20));
  76          $this->assertTrue($answer->within_tolerance(1e-20));
  77          $this->assertTrue($answer->within_tolerance(1.0001e-20));
  78          $this->assertFalse($answer->within_tolerance(1.0002e-20));
  79      }
  80  
  81      public function test_within_tolerance_blank() {
  82          $answer = new qtype_numerical_answer(13, 1234, 1.0, '', FORMAT_MOODLE, '');
  83          $this->assertTrue($answer->within_tolerance(1234));
  84          $this->assertFalse($answer->within_tolerance(1234.000001));
  85          $this->assertFalse($answer->within_tolerance(0));
  86      }
  87  
  88      public function test_within_tolerance_relative() {
  89          $answer = new qtype_numerical_answer(13, 7.0, 1.0, '', FORMAT_MOODLE, 0.1);
  90          $answer->tolerancetype = 1;
  91  
  92          $this->assertFalse($answer->within_tolerance(6.29));
  93          $this->assertTrue($answer->within_tolerance(6.3));
  94          $this->assertTrue($answer->within_tolerance(7));
  95          $this->assertTrue($answer->within_tolerance(7.7));
  96          $this->assertFalse($answer->within_tolerance(7.71));
  97      }
  98  
  99      public function test_within_tolerance_geometric() {
 100          $answer = new qtype_numerical_answer(13, 7.0, 1.0, '', FORMAT_MOODLE, 1.0);
 101          $answer->tolerancetype = 3;
 102  
 103          $this->assertFalse($answer->within_tolerance(3.49));
 104          $this->assertTrue($answer->within_tolerance(3.5));
 105          $this->assertTrue($answer->within_tolerance(7));
 106          $this->assertTrue($answer->within_tolerance(14));
 107          $this->assertFalse($answer->within_tolerance(14.01));
 108  
 109          // Geometric tolerance, negative answer.
 110          $answer = new qtype_numerical_answer(13, -7.0, 1.0, '', FORMAT_MOODLE, 1.0);
 111          $answer->tolerancetype = 3;
 112  
 113          $this->assertFalse($answer->within_tolerance(-3.49));
 114          $this->assertTrue($answer->within_tolerance(-3.5));
 115          $this->assertTrue($answer->within_tolerance(-7));
 116          $this->assertTrue($answer->within_tolerance(-14));
 117          $this->assertFalse($answer->within_tolerance(-14.01));
 118      }
 119  }