46 lines
1.4 KiB
JavaScript
46 lines
1.4 KiB
JavaScript
'use strict';
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var _interopRequireWildcard = function (obj) { return obj && obj.__esModule ? obj : { 'default': obj }; };
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var _expect = require('chai');
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var _M = require('../index.js');
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var _M2 = _interopRequireWildcard(_M);
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describe('Equations', function () {
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it('should work with one variable', function () {
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var equation = _M2['default'].equation('x+2');
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_expect.expect(equation(2)).to.equal(4);
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// Issue #10
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var subtraction = _M2['default'].equation('x - 3');
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_expect.expect(subtraction(10)).to.equal(7);
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});
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it('should work with multiple variables', function () {
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var equation = _M2['default'].equation('x+y');
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_expect.expect(equation(2, 4)).to.equal(6);
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});
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it('should work with multiple instances of the same variable', function () {
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var equation = _M2['default'].equation('x*x');
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_expect.expect(equation(4)).to.equal(16);
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});
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it('should only accept lowercase letters', function () {
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var equation = _M2['default'].equation('X+2');
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_expect.expect(equation).to['throw']();
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});
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it('should work with NumVariable expressions like 2x', function () {
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var equation = _M2['default'].equation('2x + 6y');
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_expect.expect(equation(4, 3)).to.equal(8 + 18);
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});
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it('Test case', function () {
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var equation = _M2['default'].equation('2+x*(y+4)+z^2');
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_expect.expect(equation(2, 4, 3)).to.equal(27);
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});
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}); |