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Differences Between: [Versions 310 and 311] [Versions 310 and 400] [Versions 310 and 401] [Versions 310 and 402] [Versions 310 and 403] [Versions 39 and 310]

   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   * Unit tests for qtype_calculated_variable_substituter.
  19   *
  20   * @package    qtype
  21   * @subpackage calculated
  22   * @copyright  2011 The Open University
  23   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  24   */
  25  
  26  
  27  defined('MOODLE_INTERNAL') || die();
  28  
  29  global $CFG;
  30  require_once($CFG->dirroot . '/question/type/calculated/question.php');
  31  require_once($CFG->dirroot . '/question/type/calculated/questiontype.php');
  32  
  33  
  34  /**
  35   * Unit tests for {@link qtype_calculated_variable_substituter}.
  36   *
  37   * @copyright  2011 The Open University
  38   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  39   */
  40  class qtype_calculated_variable_substituter_test extends advanced_testcase {
  41      public function test_simple_expression() {
  42          $vs = new qtype_calculated_variable_substituter(array('a' => 1, 'b' => 2), '.');
  43          $this->assertEquals(3, $vs->calculate('{a} + {b}'));
  44      }
  45  
  46      public function test_simple_expression_negatives() {
  47          $vs = new qtype_calculated_variable_substituter(array('a' => -1, 'b' => -2), '.');
  48          $this->assertEquals(1, $vs->calculate('{a}-{b}'));
  49      }
  50  
  51      public function test_cannot_use_nonnumbers() {
  52          $this->expectException(moodle_exception::class);
  53          $vs = new qtype_calculated_variable_substituter(array('a' => 'frog', 'b' => -2), '.');
  54      }
  55  
  56      public function test_invalid_expression() {
  57          $vs = new qtype_calculated_variable_substituter(array('a' => 1, 'b' => 2), '.');
  58          $this->expectException(moodle_exception::class);
  59          $vs->calculate('{a} + {b}?');
  60      }
  61  
  62      public function test_tricky_invalid_expression() {
  63          $vs = new qtype_calculated_variable_substituter(array('a' => 1, 'b' => 2), '.');
  64          $this->expectException(moodle_exception::class);
  65          $vs->calculate('{a}{b}'); // Have to make sure this does not just evaluate to 12.
  66      }
  67  
  68      public function test_division_by_zero_expression() {
  69  
  70          if (intval(PHP_VERSION) < 7) {
  71              $this->markTestSkipped('Division by zero triggers a PHP warning before PHP 7.');
  72          }
  73  
  74          $vs = new qtype_calculated_variable_substituter(array('a' => 1, 'b' => 0), '.');
  75          $this->expectException(moodle_exception::class);
  76          $vs->calculate('{a} / {b}');
  77      }
  78  
  79      public function test_replace_expressions_in_text_simple_var() {
  80          $vs = new qtype_calculated_variable_substituter(array('a' => 1, 'b' => 2), '.');
  81          $this->assertEquals('1 + 2', $vs->replace_expressions_in_text('{a} + {b}'));
  82      }
  83  
  84      public function test_replace_expressions_in_confusing_text() {
  85          $vs = new qtype_calculated_variable_substituter(array('a' => 1, 'b' => 2), '.');
  86          $this->assertEquals("(1) 1\n(2) 2", $vs->replace_expressions_in_text("(1) {a}\n(2) {b}"));
  87      }
  88  
  89      public function test_replace_expressions_in_text_formula() {
  90          $vs = new qtype_calculated_variable_substituter(array('a' => 1, 'b' => 2), '.');
  91          $this->assertEquals('= 3', $vs->replace_expressions_in_text('= {={a} + {b}}'));
  92      }
  93  
  94      public function test_expression_has_unmapped_placeholder() {
  95          $this->expectException('moodle_exception');
  96          $this->expectExceptionMessage(get_string('illegalformulasyntax', 'qtype_calculated', '{c}'));
  97          $vs = new qtype_calculated_variable_substituter(array('a' => 1, 'b' => 2), '.');
  98          $vs->calculate('{c} - {a} + {b}');
  99      }
 100  
 101      public function test_replace_expressions_in_text_negative() {
 102          $vs = new qtype_calculated_variable_substituter(array('a' => -1, 'b' => 2), '.');
 103          $this->assertEquals('temperatures -1 and 2',
 104                  $vs->replace_expressions_in_text('temperatures {a} and {b}'));
 105      }
 106  
 107      public function test_replace_expressions_in_text_commas_for_decimals() {
 108          $vs = new qtype_calculated_variable_substituter(
 109                  array('phi' => 1.61803399, 'pi' => 3.14159265), ',');
 110          $this->assertEquals('phi (1,61803399) + pi (3,14159265) = 4,75962664',
 111                  $vs->replace_expressions_in_text('phi ({phi}) + pi ({pi}) = {={phi} + {pi}}'));
 112      }
 113  
 114      public function test_format_float_dot() {
 115          $vs = new qtype_calculated_variable_substituter(array('a' => -1, 'b' => 2), '.');
 116          $this->assertSame('0.12345', $vs->format_float(0.12345));
 117  
 118          $this->assertSame('0', $vs->format_float(0.12345, 0, 1));
 119          $this->assertSame('0.12', $vs->format_float(0.12345, 2, 1));
 120          $this->assertSame('0.1235', $vs->format_float(0.12345, 4, 1));
 121  
 122          $this->assertSame('0.12', $vs->format_float(0.12345, 2, 2));
 123          $this->assertSame('0.0012', $vs->format_float(0.0012345, 4, 1));
 124      }
 125  
 126      public function test_format_float_comma() {
 127          $vs = new qtype_calculated_variable_substituter(array('a' => -1, 'b' => 2), ',');
 128          $this->assertSame('0,12345', $vs->format_float(0.12345));
 129  
 130          $this->assertSame('0', $vs->format_float(0.12345, 0, 1));
 131          $this->assertSame('0,12', $vs->format_float(0.12345, 2, 1));
 132          $this->assertSame('0,1235', $vs->format_float(0.12345, 4, 1));
 133  
 134          $this->assertSame('0,12', $vs->format_float(0.12345, 2, 2));
 135          $this->assertSame('0,0012', $vs->format_float(0.0012345, 4, 1));
 136      }
 137  
 138      public function test_format_float_nan_inf() {
 139          $vs = new qtype_calculated_variable_substituter([ ], '.');
 140  
 141          $this->assertSame('NAN', $vs->format_float(NAN));
 142          $this->assertSame('INF', $vs->format_float(INF));
 143          $this->assertSame('-INF', $vs->format_float(-INF));
 144      }
 145  }