mirror of
https://github.com/josdejong/mathjs.git
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132 lines
4.1 KiB
JavaScript
132 lines
4.1 KiB
JavaScript
var assert = require('assert');
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var math = require('../../index.js');
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describe('unit', function() {
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describe('constructor', function() {
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it('should create unit correctly', function() {
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var unit1 = math.unit(5000, 'cm');
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assert.equal(unit1.value, 50);
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assert.equal(unit1.unit.name, 'm');
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unit1 = math.unit(5, 'kg');
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assert.equal(unit1.value, 5);
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assert.equal(unit1.unit.name, 'g');
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unit1 = math.unit(null, 'kg');
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assert.equal(unit1.value, null);
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assert.equal(unit1.unit.name, 'g');
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});
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it('should throw an error if called with wrong arguments', function() {
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assert.throws(function () { Unit(2, 'inch'); });
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assert.throws(function () { new Unit('24', 'inch'); });
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assert.throws(function () { new Unit(0, 'bla'); });
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assert.throws(function () { new Unit(0, 3); });
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});
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});
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describe('isPlainUnit', function() {
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it('should return true if the string is a plain unit', function() {
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assert.equal(math.type.Unit.isPlainUnit('cm'), true);
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assert.equal(math.type.Unit.isPlainUnit('inch'), true);
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assert.equal(math.type.Unit.isPlainUnit('kb'), true);
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});
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it('should return false if the unit is not a plain unit', function() {
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assert.equal(math.type.Unit.isPlainUnit('bla'), false);
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assert.equal(math.type.Unit.isPlainUnit('5cm'), false);
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});
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});
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describe('toString', function() {
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it('should convert to string properly', function() {
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assert.equal(math.unit(5000, 'cm').toString(), '50 m');
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assert.equal(math.unit(5, 'kg').toString(), '5 kg');
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});
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it('should render with the best prefix', function() {
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assert.equal(math.unit('0.001m').toString(), '1 mm');
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assert.equal(math.unit('0.01m').toString(), '10 mm');
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assert.equal(math.unit('0.1m').toString(), '100 mm');
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assert.equal(math.unit('0.5m').toString(), '500 mm');
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assert.equal(math.unit('0.6m').toString(), '0.6 m');
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assert.equal(math.unit('1m').toString(), '1 m');
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assert.equal(math.unit('10m').toString(), '10 m');
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assert.equal(math.unit('100m').toString(), '100 m');
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assert.equal(math.unit('300m').toString(), '300 m');
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assert.equal(math.unit('500m').toString(), '500 m');
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assert.equal(math.unit('600m').toString(), '0.6 km');
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assert.equal(math.unit('1000m').toString(), '1 km');
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});
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});
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describe('parse', function() {
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it('should parse units correctly', function() {
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var unit1;
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unit1 = math.unit('5kg');
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assert.equal(unit1.value, 5);
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assert.equal(unit1.unit.name, 'g');
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assert.equal(unit1.prefix.name, 'k');
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unit1 = math.unit('5 kg');
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assert.equal(unit1.value, 5);
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assert.equal(unit1.unit.name, 'g');
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assert.equal(unit1.prefix.name, 'k');
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unit1 = math.unit(' 5 kg ');
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assert.equal(unit1.value, 5);
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assert.equal(unit1.unit.name, 'g');
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assert.equal(unit1.prefix.name, 'k');
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unit1 = math.unit('5e-3kg');
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assert.equal(unit1.value, 0.005);
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assert.equal(unit1.unit.name, 'g');
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assert.equal(unit1.prefix.name, 'k');
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unit1 = math.unit('5e+3kg');
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assert.equal(unit1.value, 5000);
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assert.equal(unit1.unit.name, 'g');
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assert.equal(unit1.prefix.name, 'k');
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unit1 = math.unit('-5kg');
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assert.equal(unit1.value, -5);
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assert.equal(unit1.unit.name, 'g');
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assert.equal(unit1.prefix.name, 'k');
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unit1 = math.unit('-5mg');
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assert.equal(unit1.value, -5);
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assert.equal(unit1.unit.name, 'g');
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assert.equal(unit1.prefix.name, 'm');
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});
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});
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describe('in', function() {
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it('??? isnt it already tested in function/units', function() {
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// test unit.in and unit.as
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var u = math.unit(5000, 'cm');
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assert.equal(u.toString(), '50 m');
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var u2 = u.in('mm');
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assert.equal(u2.toString(), '50000 mm');
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assert.strictEqual(u.toNumber('mm'), 50000);
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assert.throws( function () {u.in('5mm'); });
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var u3 = math.unit('5.08 cm').in('inch');
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assert.equal(u3.toString(), '2 inch');
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assert.strictEqual(math.format(math.unit('5.08 cm').toNumber('inch')), '2');
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});
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});
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// TODO: extensively test Unit
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}); |