thereadme/Equation.js
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feat: 1.3.7, solves #15

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This commit is contained in:
Mahdi Dibaiee
2020-06-09 14:58:42 +01:00
parent db3ec53031
commit e30d6a44b3
11 changed files with 8391 additions and 1550 deletions
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38
dist/tests/equation.js vendored
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@ -1,46 +1,46 @@
'use strict';
var _interopRequireWildcard = function (obj) { return obj && obj.__esModule ? obj : { 'default': obj }; };
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }
var _expect = require('chai');
var _chai = require('chai');
var _M = require('../index.js');
var _indexJs = require('../index.js');
var _M2 = _interopRequireWildcard(_M);
var _indexJs2 = _interopRequireDefault(_indexJs);
describe('Equations', function () {
it('should work with one variable', function () {
var equation = _M2['default'].equation('x+2');
var equation = _indexJs2['default'].equation('x+2');
_expect.expect(equation(2)).to.equal(4);
(0, _chai.expect)(equation(2)).to.equal(4);
// Issue #10
var subtraction = _M2['default'].equation('x - 3');
_expect.expect(subtraction(10)).to.equal(7);
var subtraction = _indexJs2['default'].equation('x - 3');
(0, _chai.expect)(subtraction(10)).to.equal(7);
});
it('should work with multiple variables', function () {
var equation = _M2['default'].equation('x+y');
_expect.expect(equation(2, 4)).to.equal(6);
var equation = _indexJs2['default'].equation('x+y');
(0, _chai.expect)(equation(2, 4)).to.equal(6);
});
it('should work with multiple instances of the same variable', function () {
var equation = _M2['default'].equation('x*x');
_expect.expect(equation(4)).to.equal(16);
var equation = _indexJs2['default'].equation('x*x');
(0, _chai.expect)(equation(4)).to.equal(16);
});
it('should only accept lowercase letters', function () {
var equation = _M2['default'].equation('X+2');
_expect.expect(equation).to['throw']();
var equation = _indexJs2['default'].equation('X+2');
(0, _chai.expect)(equation).to['throw']();
});
it('should work with NumVariable expressions like 2x', function () {
var equation = _M2['default'].equation('2x + 6y');
_expect.expect(equation(4, 3)).to.equal(8 + 18);
var equation = _indexJs2['default'].equation('2x + 6y');
(0, _chai.expect)(equation(4, 3)).to.equal(8 + 18);
});
it('Test case', function () {
var equation = _M2['default'].equation('2+x*(y+4)+z^2');
_expect.expect(equation(2, 4, 3)).to.equal(27);
var equation = _indexJs2['default'].equation('2+x*(y+4)+z^2');
(0, _chai.expect)(equation(2, 4, 3)).to.equal(27);
});
});
});

62
dist/tests/solve.js vendored
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@ -1,116 +1,116 @@
'use strict';
var _interopRequireWildcard = function (obj) { return obj && obj.__esModule ? obj : { 'default': obj }; };
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }
var _expect = require('chai');
var _chai = require('chai');
var _M = require('../index.js');
var _indexJs = require('../index.js');
var _M2 = _interopRequireWildcard(_M);
var _indexJs2 = _interopRequireDefault(_indexJs);
describe('Basic math operators', function () {
it('should work for add +', function () {
_expect.expect(_M2['default'].solve('2+2')).to.equal(4);
(0, _chai.expect)(_indexJs2['default'].solve('2+2')).to.equal(4);
});
it('should work for minus -', function () {
_expect.expect(_M2['default'].solve('15-3')).to.equal(12);
(0, _chai.expect)(_indexJs2['default'].solve('15-3')).to.equal(12);
});
it('should work for divison /', function () {
_expect.expect(_M2['default'].solve('20/2')).to.equal(10);
(0, _chai.expect)(_indexJs2['default'].solve('20/2')).to.equal(10);
});
it('should work for multiplication *', function () {
_expect.expect(_M2['default'].solve('6*3')).to.equal(18);
(0, _chai.expect)(_indexJs2['default'].solve('6*3')).to.equal(18);
});
it('should work for power ^', function () {
_expect.expect(_M2['default'].solve('5^2')).to.equal(25);
(0, _chai.expect)(_indexJs2['default'].solve('5^2')).to.equal(25);
});
it('should work for multi-digit numbers', function () {
_expect.expect(_M2['default'].solve('12+15')).to.equal(27);
(0, _chai.expect)(_indexJs2['default'].solve('12+15')).to.equal(27);
});
it('should deal with floating precision of javascript - #5', function () {
_expect.expect(_M2['default'].solve('0.2 + 0.1')).to.equal(0.3);
_expect.expect(_M2['default'].solve('0.2 + 0.4')).to.equal(0.6);
_expect.expect(_M2['default'].solve('round(floor(1.23456789/0.2)) * 0.2')).to.equal(1.2);
_expect.expect(_M2['default'].solve('1.23456789 - (1.23456789 % 0.2)')).to.equal(1.2);
(0, _chai.expect)(_indexJs2['default'].solve('0.2 + 0.1')).to.equal(0.3);
(0, _chai.expect)(_indexJs2['default'].solve('0.2 + 0.4')).to.equal(0.6);
(0, _chai.expect)(_indexJs2['default'].solve('round(floor(1.23456789/0.2)) * 0.2')).to.equal(1.2);
(0, _chai.expect)(_indexJs2['default'].solve('1.23456789 - (1.23456789 % 0.2)')).to.equal(1.2);
});
});
describe('Negative Numbers', function () {
it('should work for negative numbers after operators', function () {
_expect.expect(_M2['default'].solve('2 + -5')).to.equal(-3);
(0, _chai.expect)(_indexJs2['default'].solve('2 + -5')).to.equal(-3);
});
it('should work for negative numbers after groups', function () {
_expect.expect(_M2['default'].solve('1 + (2 - 5) - 2')).to.equal(-4);
(0, _chai.expect)(_indexJs2['default'].solve('1 + (2 - 5) - 2')).to.equal(-4);
});
it('should work for expressions starting with negative numbers', function () {
_expect.expect(_M2['default'].solve('-2 + 1')).to.equal(-1);
(0, _chai.expect)(_indexJs2['default'].solve('-2 + 1')).to.equal(-1);
});
});
describe('Precedence', function () {
it('Test case 1', function () {
_expect.expect(_M2['default'].solve('2+(2+1)*(1+1)^2')).to.equal(14);
(0, _chai.expect)(_indexJs2['default'].solve('2+(2+1)*(1+1)^2')).to.equal(14);
});
it('Test case 2', function () {
_expect.expect(_M2['default'].solve('2+5*4/2-2')).to.equal(10);
(0, _chai.expect)(_indexJs2['default'].solve('2+5*4/2-2')).to.equal(10);
});
it('Test case 3', function () {
_expect.expect(_M2['default'].solve('2+(5*4/2)-2')).to.equal(10);
(0, _chai.expect)(_indexJs2['default'].solve('2+(5*4/2)-2')).to.equal(10);
});
it('Test case 4', function () {
_expect.expect(_M2['default'].solve('(2+2)^2+(5+1)*4+(2+(4/2)/2)')).to.equal(16 + 24 + 3);
(0, _chai.expect)(_indexJs2['default'].solve('(2+2)^2+(5+1)*4+(2+(4/2)/2)')).to.equal(16 + 24 + 3);
});
});
describe('Functions', function () {
it('should work with parantheses', function () {
_expect.expect(_M2['default'].solve('lg(4) * 5')).to.equal(10);
(0, _chai.expect)(_indexJs2['default'].solve('lg(4) * 5')).to.equal(10);
});
it('should work without parantheses', function () {
_expect.expect(_M2['default'].solve('lg4 * 5')).to.equal(10);
(0, _chai.expect)(_indexJs2['default'].solve('lg4 * 5')).to.equal(10);
});
it('should work for wrapped functions', function () {
_expect.expect(_M2['default'].solve('(lg4)*2')).to.equal(4);
(0, _chai.expect)(_indexJs2['default'].solve('(lg4)*2')).to.equal(4);
});
});
describe('Constats', function () {
it('should work for constant values', function () {
_expect.expect(_M2['default'].solve('sin(PI/2)')).to.equal(1);
(0, _chai.expect)(_indexJs2['default'].solve('sin(PI/2)')).to.equal(1);
});
it('should work for functions as constants - retry on fail', function () {
_expect.expect(_M2['default'].solve('RAND')).to.not.equal(_M2['default'].solve('RAND'));
(0, _chai.expect)(_indexJs2['default'].solve('RAND')).to.not.equal(_indexJs2['default'].solve('RAND'));
});
});
describe('Sigma', function () {
it('should work with simple expressions', function () {
_expect.expect(_M2['default'].solve('sigma(0, 5, @)')).to.equal(15);
(0, _chai.expect)(_indexJs2['default'].solve('sigma(0, 5, @)')).to.equal(15);
});
it('should work with more complex expressions', function () {
_expect.expect(_M2['default'].solve('sigma(0, 2, 2@+5)')).to.equal(21);
(0, _chai.expect)(_indexJs2['default'].solve('sigma(0, 2, 2@+5)')).to.equal(21);
});
it('should work without an iterator sign', function () {
_expect.expect(_M2['default'].solve('sigma(0, 2, 5*2)')).to.equal(30);
(0, _chai.expect)(_indexJs2['default'].solve('sigma(0, 2, 5*2)')).to.equal(30);
});
it('should work with negative start / end points', function () {
_expect.expect(_M2['default'].solve('sigma(-5, -2, @)')).to.equal(-14);
(0, _chai.expect)(_indexJs2['default'].solve('sigma(-5, -2, @)')).to.equal(-14);
});
});
});