mirror of
https://github.com/moodle/moodle.git
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410 lines
13 KiB
PHP
410 lines
13 KiB
PHP
<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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namespace core;
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use calc_formula;
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defined('MOODLE_INTERNAL') || die();
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global $CFG;
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require_once($CFG->libdir . '/mathslib.php');
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/**
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* Unit tests of mathslib wrapper and underlying EvalMath library.
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*
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* @package core
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* @category phpunit
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* @copyright 2007 Petr Skoda {@link http://skodak.org}
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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class mathslib_test extends \basic_testcase {
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/**
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* Tests the basic formula evaluation.
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*/
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public function test__basic() {
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$formula = new calc_formula('=1+2');
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$res = $formula->evaluate();
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$this->assertSame($res, 3, '3+1 is: %s');
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}
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/**
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* Tests the formula params.
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*/
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public function test__params() {
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$formula = new calc_formula('=a+b+c', array('a'=>10, 'b'=>20, 'c'=>30));
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$res = $formula->evaluate();
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$this->assertSame(60, $res, '10+20+30 is: %s');
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}
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/**
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* Tests the changed params.
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*/
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public function test__changing_params() {
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$formula = new calc_formula('=a+b+c', array('a'=>10, 'b'=>20, 'c'=>30));
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$res = $formula->evaluate();
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$this->assertSame(60, $res, '10+20+30 is: %s');
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$formula->set_params(array('a'=>1, 'b'=>2, 'c'=>3));
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$res = $formula->evaluate();
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$this->assertSame(6, $res, 'changed params 1+2+3 is: %s');
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}
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/**
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* Tests the spreadsheet emulation function in formula.
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*/
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public function test__calc_function() {
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$formula = new calc_formula('=sum(a, b, c)', array('a'=>10, 'b'=>20, 'c'=>30));
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$res = $formula->evaluate();
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$this->assertSame(60, $res, 'sum(a, b, c) is: %s');
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}
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public function test_other_functions() {
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$formula = new calc_formula('=average(1,2,3)');
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$this->assertSame(2, $formula->evaluate());
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$formula = new calc_formula('=mod(10,3)');
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$this->assertSame(1, $formula->evaluate());
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$formula = new calc_formula('=power(2,3)');
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$this->assertSame(8, $formula->evaluate());
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}
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public function test_conditional_functions() {
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// Test ifthenelse.
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$formula = new calc_formula('=ifthenelse(1,2,3)');
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$this->assertSame(2, (int)$formula->evaluate());
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$formula = new calc_formula('=ifthenelse(0,2,3)');
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$this->assertSame(3, (int) $formula->evaluate());
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$formula = new calc_formula('=ifthenelse(2<3,2,3)');
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$this->assertSame(2, (int) $formula->evaluate());
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// Test synonym if.
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$formula = new calc_formula('=if(1,2,3)');
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$this->assertSame(2, (int)$formula->evaluate());
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$formula = new calc_formula('=if(0,2,3)');
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$this->assertSame(3, (int) $formula->evaluate());
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$formula = new calc_formula('=if(2<3,2,3)');
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$this->assertSame(2, (int) $formula->evaluate());
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// Test cond_and.
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$formula = new calc_formula('=cond_and(1,1,1)');
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$this->assertSame(1, (int)$formula->evaluate());
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$formula = new calc_formula('=cond_and(1,1,0)');
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$this->assertSame(0, (int) $formula->evaluate());
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$formula = new calc_formula('=cond_and(0,0,0)');
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$this->assertSame(0, (int) $formula->evaluate());
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// Test synonym and.
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$formula = new calc_formula('=and(1,1,1)');
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$this->assertSame(1, (int)$formula->evaluate());
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$formula = new calc_formula('=and(1,1,0)');
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$this->assertSame(0, (int) $formula->evaluate());
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$formula = new calc_formula('=and(0,0,0)');
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$this->assertSame(0, (int) $formula->evaluate());
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// Test cond_or.
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$formula = new calc_formula('=cond_or(1,1,1)');
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$this->assertSame(1, (int)$formula->evaluate());
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$formula = new calc_formula('=cond_or(1,1,0)');
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$this->assertSame(1, (int) $formula->evaluate());
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$formula = new calc_formula('=cond_or(0,0,0)');
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$this->assertSame(0, (int) $formula->evaluate());
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// Test synonym or.
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$formula = new calc_formula('=or(1,1,1)');
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$this->assertSame(1, (int)$formula->evaluate());
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$formula = new calc_formula('=or(1,1,0)');
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$this->assertSame(1, (int) $formula->evaluate());
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$formula = new calc_formula('=or(0,0,0)');
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$this->assertSame(0, (int) $formula->evaluate());
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}
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public function test_conditional_operators() {
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$formula = new calc_formula('=2==2');
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$this->assertSame(1, $formula->evaluate());
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$formula = new calc_formula('=2>3');
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$this->assertSame(0, $formula->evaluate());
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$formula = new calc_formula('=2<3');
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$this->assertSame(1, $formula->evaluate());
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$formula = new calc_formula('=(2<=3)');
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$this->assertSame(1, $formula->evaluate());
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$formula = new calc_formula('=(2<=3)*10');
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$this->assertSame(10, $formula->evaluate());
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$formula = new calc_formula('=(2>=3)*10');
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$this->assertSame(0, $formula->evaluate());
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$formula = new calc_formula('=2<3*10');
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$this->assertSame(10, $formula->evaluate());
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}
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/**
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* Tests the min and max functions.
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*/
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public function test__minmax_function() {
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$formula = new calc_formula('=min(a, b, c)', array('a'=>10, 'b'=>20, 'c'=>30));
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$res = $formula->evaluate();
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$this->assertSame(10, $res, 'minimum is: %s');
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$formula = new calc_formula('=max(a, b, c)', array('a'=>10, 'b'=>20, 'c'=>30));
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$res = $formula->evaluate();
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$this->assertSame(30, $res, 'maximum is: %s');
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}
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/**
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* Tests special chars.
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*/
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public function test__specialchars() {
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$formula = new calc_formula('=gi1 + gi2 + gi11', array('gi1'=>10, 'gi2'=>20, 'gi11'=>30));
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$res = $formula->evaluate();
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$this->assertSame(60, $res, 'sum is: %s');
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}
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/**
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* Tests some slightly more complex expressions.
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*/
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public function test__more_complex_expressions() {
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$formula = new calc_formula('=pi() + a', array('a'=>10));
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$res = $formula->evaluate();
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$this->assertSame(pi()+10, $res);
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$formula = new calc_formula('=pi()^a', array('a'=>10));
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$res = $formula->evaluate();
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$this->assertSame(pow(pi(), 10), $res);
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$formula = new calc_formula('=-8*(5/2)^2*(1-sqrt(4))-8');
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$res = $formula->evaluate();
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$this->assertSame(-8*pow((5/2), 2)*(1-sqrt(4))-8, $res);
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}
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/**
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* Tests some slightly more complex expressions.
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*/
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public function test__error_handling() {
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$formula = new calc_formula('=pi( + a', array('a'=>10));
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$res = $formula->evaluate();
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$this->assertFalse($res);
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$this->assertSame(get_string('unexpectedoperator', 'mathslib', '+'), $formula->get_error());
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$formula = new calc_formula('=pi(');
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$res = $formula->evaluate();
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$this->assertSame($res, false);
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$this->assertSame(get_string('expectingaclosingbracket', 'mathslib'), $formula->get_error());
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$formula = new calc_formula('=pi()^');
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$res = $formula->evaluate();
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$this->assertSame($res, false);
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$this->assertSame(get_string('operatorlacksoperand', 'mathslib', '^'), $formula->get_error());
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}
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public function test_rounding_function() {
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// Rounding to the default number of decimal places.
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// The default == 0.
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$formula = new calc_formula('=round(2.5)');
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$this->assertSame(3.0, $formula->evaluate());
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$formula = new calc_formula('=round(1.5)');
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$this->assertSame(2.0, $formula->evaluate());
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$formula = new calc_formula('=round(-1.49)');
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$this->assertSame(-1.0, $formula->evaluate());
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$formula = new calc_formula('=round(-2.49)');
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$this->assertSame(-2.0, $formula->evaluate());
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$formula = new calc_formula('=round(-1.5)');
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$this->assertSame(-2.0, $formula->evaluate());
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$formula = new calc_formula('=round(-2.5)');
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$this->assertSame(-3.0, $formula->evaluate());
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$formula = new calc_formula('=ceil(2.5)');
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$this->assertSame(3.0, $formula->evaluate());
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$formula = new calc_formula('=ceil(1.5)');
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$this->assertSame(2.0, $formula->evaluate());
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$formula = new calc_formula('=ceil(-1.49)');
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$this->assertSame(-1.0, $formula->evaluate());
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$formula = new calc_formula('=ceil(-2.49)');
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$this->assertSame(-2.0, $formula->evaluate());
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$formula = new calc_formula('=ceil(-1.5)');
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$this->assertSame(-1.0, $formula->evaluate());
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$formula = new calc_formula('=ceil(-2.5)');
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$this->assertSame(-2.0, $formula->evaluate());
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$formula = new calc_formula('=floor(2.5)');
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$this->assertSame(2.0, $formula->evaluate());
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$formula = new calc_formula('=floor(1.5)');
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$this->assertSame(1.0, $formula->evaluate());
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$formula = new calc_formula('=floor(-1.49)');
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$this->assertSame(-2.0, $formula->evaluate());
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$formula = new calc_formula('=floor(-2.49)');
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$this->assertSame(-3.0, $formula->evaluate());
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$formula = new calc_formula('=floor(-1.5)');
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$this->assertSame(-2.0, $formula->evaluate());
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$formula = new calc_formula('=floor(-2.5)');
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$this->assertSame(-3.0, $formula->evaluate());
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// Rounding to an explicit number of decimal places.
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$formula = new calc_formula('=round(2.5, 1)');
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$this->assertSame(2.5, $formula->evaluate());
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$formula = new calc_formula('=round(2.5, 0)');
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$this->assertSame(3.0, $formula->evaluate());
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$formula = new calc_formula('=round(1.2345, 2)');
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$this->assertSame(1.23, $formula->evaluate());
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$formula = new calc_formula('=round(123.456, -1)');
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$this->assertSame(120.0, $formula->evaluate());
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}
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public function test_scientific_notation() {
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$formula = new calc_formula('=10e10');
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$this->assertEqualsWithDelta(1e11, $formula->evaluate(), 1e11 * 1e-15);
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$formula = new calc_formula('=10e-10');
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$this->assertEqualsWithDelta(1e-9, $formula->evaluate(), 1e11 * 1e-15);
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$formula = new calc_formula('=10e+10');
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$this->assertEqualsWithDelta(1e11, $formula->evaluate(), 1e11 * 1e-15);
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$formula = new calc_formula('=10e10*5');
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$this->assertEqualsWithDelta(5e11, $formula->evaluate(), 1e11 * 1e-15);
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$formula = new calc_formula('=10e10^2');
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$this->assertEqualsWithDelta(1e22, $formula->evaluate(), 1e22 * 1e-15);
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}
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public function test_rand_float() {
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$formula = new calc_formula('=rand_float()');
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$result = $formula->evaluate();
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$this->assertTrue(is_float($result));
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}
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/**
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* Tests the modulo operator.
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*
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* @covers calc_formula::evaluate
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* @dataProvider moduloOperatorData
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*
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* @param string $formula
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* @param array $values
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* @param int|float $expectedResult
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*/
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public function shouldSupportModuloOperator($formula, $values, $expectedResult)
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{
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$formula = new calc_formula($formula);
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$formula->set_params($values);
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$this->assertEquals($expectedResult, $formula->evaluate());
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}
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/**
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* Data provider for shouldSupportModuloOperator
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*
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* @return array
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*/
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public function moduloOperatorData() {
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return array(
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array(
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'=a%b', // 9%3 => 0
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array('a' => 9, 'b' => 3),
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0
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),
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array(
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'=a%b', // 10%3 => 1
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array('a' => 10, 'b' => 3),
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1
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),
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array(
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'=10-a%(b+c*d)', // 10-10%(7-2*2) => 9
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array('a' => '10', 'b' => 7, 'c' => -2, 'd' => 2),
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9
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)
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);
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}
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/**
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* Tests the double minus as plus.
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*
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* @covers calc_formula::evaluate
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* @dataProvider doubleMinusData
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*
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* @param string $formula
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* @param array $values
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* @param int|float $expectedResult
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*/
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public function shouldConsiderDoubleMinusAsPlus($formula, $values, $expectedResult)
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{
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$formula = new calc_formula($formula);
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$formula->set_params($values);
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$this->assertEquals($expectedResult, $formula->evaluate());
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}
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/**
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* Data provider for shouldConsiderDoubleMinusAsPlus
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*
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* @return array
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*/
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public function doubleMinusData() {
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return array(
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array(
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'=a+b*c--d', // 1+2*3--4 => 1+6+4 => 11
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array(
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'a' => 1,
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'b' => 2,
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'c' => 3,
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'd' => 4
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),
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11
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),
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array(
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'=a+b*c--d', // 1+2*3---4 => 1+6-4 => 3
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array(
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'a' => 1,
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'b' => 2,
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'c' => 3,
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'd' => -4
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),
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3
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)
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);
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}
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}
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