/lib/tests/mathslib_test.php
PHP | 318 lines | 192 code | 71 blank | 55 comment | 1 complexity | a31064b0ebd12b3ad4af4742d806b3a8 MD5 | raw file
- <?php
- // This file is part of Moodle - http://moodle.org/
- //
- // Moodle is free software: you can redistribute it and/or modify
- // it under the terms of the GNU General Public License as published by
- // the Free Software Foundation, either version 3 of the License, or
- // (at your option) any later version.
- //
- // Moodle is distributed in the hope that it will be useful,
- // but WITHOUT ANY WARRANTY; without even the implied warranty of
- // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- // GNU General Public License for more details.
- //
- // You should have received a copy of the GNU General Public License
- // along with Moodle. If not, see <http://www.gnu.org/licenses/>.
- /**
- * Unit tests of mathslib wrapper and underlying EvalMath library.
- *
- * @package core
- * @category phpunit
- * @copyright 2007 Petr Skoda {@link http://skodak.org}
- * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
- */
- defined('MOODLE_INTERNAL') || die();
- global $CFG;
- require_once($CFG->libdir . '/mathslib.php');
- class core_mathslib_testcase extends basic_testcase {
- /**
- * Tests the basic formula evaluation.
- */
- public function test__basic() {
- $formula = new calc_formula('=1+2');
- $res = $formula->evaluate();
- $this->assertSame($res, 3, '3+1 is: %s');
- }
- /**
- * Tests the formula params.
- */
- public function test__params() {
- $formula = new calc_formula('=a+b+c', array('a'=>10, 'b'=>20, 'c'=>30));
- $res = $formula->evaluate();
- $this->assertSame(60, $res, '10+20+30 is: %s');
- }
- /**
- * Tests the changed params.
- */
- public function test__changing_params() {
- $formula = new calc_formula('=a+b+c', array('a'=>10, 'b'=>20, 'c'=>30));
- $res = $formula->evaluate();
- $this->assertSame(60, $res, '10+20+30 is: %s');
- $formula->set_params(array('a'=>1, 'b'=>2, 'c'=>3));
- $res = $formula->evaluate();
- $this->assertSame(6, $res, 'changed params 1+2+3 is: %s');
- }
- /**
- * Tests the spreadsheet emulation function in formula.
- */
- public function test__calc_function() {
- $formula = new calc_formula('=sum(a, b, c)', array('a'=>10, 'b'=>20, 'c'=>30));
- $res = $formula->evaluate();
- $this->assertSame(60, $res, 'sum(a, b, c) is: %s');
- }
- public function test_other_functions() {
- $formula = new calc_formula('=average(1,2,3)');
- $this->assertSame(2, $formula->evaluate());
- $formula = new calc_formula('=mod(10,3)');
- $this->assertSame(1, $formula->evaluate());
- $formula = new calc_formula('=power(2,3)');
- $this->assertSame(8, $formula->evaluate());
- }
- public function test_conditional_functions() {
- // Test ifthenelse.
- $formula = new calc_formula('=ifthenelse(1,2,3)');
- $this->assertSame(2, (int)$formula->evaluate());
- $formula = new calc_formula('=ifthenelse(0,2,3)');
- $this->assertSame(3, (int) $formula->evaluate());
- $formula = new calc_formula('=ifthenelse(2<3,2,3)');
- $this->assertSame(2, (int) $formula->evaluate());
- // Test synonym if.
- $formula = new calc_formula('=if(1,2,3)');
- $this->assertSame(2, (int)$formula->evaluate());
- $formula = new calc_formula('=if(0,2,3)');
- $this->assertSame(3, (int) $formula->evaluate());
- $formula = new calc_formula('=if(2<3,2,3)');
- $this->assertSame(2, (int) $formula->evaluate());
- // Test cond_and.
- $formula = new calc_formula('=cond_and(1,1,1)');
- $this->assertSame(1, (int)$formula->evaluate());
- $formula = new calc_formula('=cond_and(1,1,0)');
- $this->assertSame(0, (int) $formula->evaluate());
- $formula = new calc_formula('=cond_and(0,0,0)');
- $this->assertSame(0, (int) $formula->evaluate());
- // Test synonym and.
- $formula = new calc_formula('=and(1,1,1)');
- $this->assertSame(1, (int)$formula->evaluate());
- $formula = new calc_formula('=and(1,1,0)');
- $this->assertSame(0, (int) $formula->evaluate());
- $formula = new calc_formula('=and(0,0,0)');
- $this->assertSame(0, (int) $formula->evaluate());
- // Test cond_or.
- $formula = new calc_formula('=cond_or(1,1,1)');
- $this->assertSame(1, (int)$formula->evaluate());
- $formula = new calc_formula('=cond_or(1,1,0)');
- $this->assertSame(1, (int) $formula->evaluate());
- $formula = new calc_formula('=cond_or(0,0,0)');
- $this->assertSame(0, (int) $formula->evaluate());
- // Test synonym or.
- $formula = new calc_formula('=or(1,1,1)');
- $this->assertSame(1, (int)$formula->evaluate());
- $formula = new calc_formula('=or(1,1,0)');
- $this->assertSame(1, (int) $formula->evaluate());
- $formula = new calc_formula('=or(0,0,0)');
- $this->assertSame(0, (int) $formula->evaluate());
- }
- public function test_conditional_operators() {
- $formula = new calc_formula('=2==2');
- $this->assertSame(1, $formula->evaluate());
- $formula = new calc_formula('=2>3');
- $this->assertSame(0, $formula->evaluate());
- $formula = new calc_formula('=2<3');
- $this->assertSame(1, $formula->evaluate());
- $formula = new calc_formula('=(2<=3)');
- $this->assertSame(1, $formula->evaluate());
- $formula = new calc_formula('=(2<=3)*10');
- $this->assertSame(10, $formula->evaluate());
- $formula = new calc_formula('=(2>=3)*10');
- $this->assertSame(0, $formula->evaluate());
- $formula = new calc_formula('=2<3*10');
- $this->assertSame(10, $formula->evaluate());
- }
- /**
- * Tests the min and max functions.
- */
- public function test__minmax_function() {
- $formula = new calc_formula('=min(a, b, c)', array('a'=>10, 'b'=>20, 'c'=>30));
- $res = $formula->evaluate();
- $this->assertSame(10, $res, 'minimum is: %s');
- $formula = new calc_formula('=max(a, b, c)', array('a'=>10, 'b'=>20, 'c'=>30));
- $res = $formula->evaluate();
- $this->assertSame(30, $res, 'maximum is: %s');
- }
- /**
- * Tests special chars.
- */
- public function test__specialchars() {
- $formula = new calc_formula('=gi1 + gi2 + gi11', array('gi1'=>10, 'gi2'=>20, 'gi11'=>30));
- $res = $formula->evaluate();
- $this->assertSame(60, $res, 'sum is: %s');
- }
- /**
- * Tests some slightly more complex expressions.
- */
- public function test__more_complex_expressions() {
- $formula = new calc_formula('=pi() + a', array('a'=>10));
- $res = $formula->evaluate();
- $this->assertSame(pi()+10, $res);
- $formula = new calc_formula('=pi()^a', array('a'=>10));
- $res = $formula->evaluate();
- $this->assertSame(pow(pi(), 10), $res);
- $formula = new calc_formula('=-8*(5/2)^2*(1-sqrt(4))-8');
- $res = $formula->evaluate();
- $this->assertSame(-8*pow((5/2), 2)*(1-sqrt(4))-8, $res);
- }
- /**
- * Tests some slightly more complex expressions.
- */
- public function test__error_handling() {
- $formula = new calc_formula('=pi( + a', array('a'=>10));
- $res = $formula->evaluate();
- $this->assertFalse($res);
- $this->assertSame(get_string('unexpectedoperator', 'mathslib', '+'), $formula->get_error());
- $formula = new calc_formula('=pi(');
- $res = $formula->evaluate();
- $this->assertSame($res, false);
- $this->assertSame(get_string('expectingaclosingbracket', 'mathslib'), $formula->get_error());
- $formula = new calc_formula('=pi()^');
- $res = $formula->evaluate();
- $this->assertSame($res, false);
- $this->assertSame(get_string('operatorlacksoperand', 'mathslib', '^'), $formula->get_error());
- }
- public function test_rounding_function() {
- // Rounding to the default number of decimal places.
- // The default == 0.
- $formula = new calc_formula('=round(2.5)');
- $this->assertSame(3.0, $formula->evaluate());
- $formula = new calc_formula('=round(1.5)');
- $this->assertSame(2.0, $formula->evaluate());
- $formula = new calc_formula('=round(-1.49)');
- $this->assertSame(-1.0, $formula->evaluate());
- $formula = new calc_formula('=round(-2.49)');
- $this->assertSame(-2.0, $formula->evaluate());
- $formula = new calc_formula('=round(-1.5)');
- $this->assertSame(-2.0, $formula->evaluate());
- $formula = new calc_formula('=round(-2.5)');
- $this->assertSame(-3.0, $formula->evaluate());
- $formula = new calc_formula('=ceil(2.5)');
- $this->assertSame(3.0, $formula->evaluate());
- $formula = new calc_formula('=ceil(1.5)');
- $this->assertSame(2.0, $formula->evaluate());
- $formula = new calc_formula('=ceil(-1.49)');
- $this->assertSame(-1.0, $formula->evaluate());
- $formula = new calc_formula('=ceil(-2.49)');
- $this->assertSame(-2.0, $formula->evaluate());
- $formula = new calc_formula('=ceil(-1.5)');
- $this->assertSame(-1.0, $formula->evaluate());
- $formula = new calc_formula('=ceil(-2.5)');
- $this->assertSame(-2.0, $formula->evaluate());
- $formula = new calc_formula('=floor(2.5)');
- $this->assertSame(2.0, $formula->evaluate());
- $formula = new calc_formula('=floor(1.5)');
- $this->assertSame(1.0, $formula->evaluate());
- $formula = new calc_formula('=floor(-1.49)');
- $this->assertSame(-2.0, $formula->evaluate());
- $formula = new calc_formula('=floor(-2.49)');
- $this->assertSame(-3.0, $formula->evaluate());
- $formula = new calc_formula('=floor(-1.5)');
- $this->assertSame(-2.0, $formula->evaluate());
- $formula = new calc_formula('=floor(-2.5)');
- $this->assertSame(-3.0, $formula->evaluate());
- // Rounding to an explicit number of decimal places.
- $formula = new calc_formula('=round(2.5, 1)');
- $this->assertSame(2.5, $formula->evaluate());
- $formula = new calc_formula('=round(2.5, 0)');
- $this->assertSame(3.0, $formula->evaluate());
- $formula = new calc_formula('=round(1.2345, 2)');
- $this->assertSame(1.23, $formula->evaluate());
- $formula = new calc_formula('=round(123.456, -1)');
- $this->assertSame(120.0, $formula->evaluate());
- }
- public function test_scientific_notation() {
- $formula = new calc_formula('=10e10');
- $this->assertEqualsWithDelta(1e11, $formula->evaluate(), 1e11 * 1e-15);
- $formula = new calc_formula('=10e-10');
- $this->assertEqualsWithDelta(1e-9, $formula->evaluate(), 1e11 * 1e-15);
- $formula = new calc_formula('=10e+10');
- $this->assertEqualsWithDelta(1e11, $formula->evaluate(), 1e11 * 1e-15);
- $formula = new calc_formula('=10e10*5');
- $this->assertEqualsWithDelta(5e11, $formula->evaluate(), 1e11 * 1e-15);
- $formula = new calc_formula('=10e10^2');
- $this->assertEqualsWithDelta(1e22, $formula->evaluate(), 1e22 * 1e-15);
- }
- public function test_rand_float() {
- $formula = new calc_formula('=rand_float()');
- $result = $formula->evaluate();
- $this->assertTrue(is_float($result));
- }
- }