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Conflicts: HISTORY.md bower.json component.json dist/math.js dist/math.map dist/math.min.js docs/reference/units.md lib/version.js package.json test/function/construction/chain.test.js test/function/matrix/det.test.js test/function/matrix/transpose.test.js test/function/utils/import.test.js
60 lines
2.0 KiB
JavaScript
60 lines
2.0 KiB
JavaScript
// test sign
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var assert = require('assert');
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var approx = require('../../../tools/approx');
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var math = require('../../../index');
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var bignumber = math.bignumber;
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describe('sign', function() {
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it('should calculate the sign of a boolean', function () {
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assert.equal(math.sign(true), 1);
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assert.equal(math.sign(false), 0);
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});
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it('should calculate the sign of null', function () {
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assert.equal(math.sign(null), 0);
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});
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it('should calculate the sign of a number', function() {
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assert.equal(math.sign(3), 1);
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assert.equal(math.sign(-3), -1);
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assert.equal(math.sign(0), 0);
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});
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it('should calculate the sign of a big number', function() {
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assert.deepEqual(math.sign(bignumber(3)), bignumber(1));
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assert.deepEqual(math.sign(bignumber(-3)), bignumber(-1));
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assert.deepEqual(math.sign(bignumber(0)), bignumber(0));
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});
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it('should calculate the sign of a complex value', function() {
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approx.deepEqual(math.sign(math.complex(2,-3)), math.complex(0.554700196225229, -0.832050294337844));
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});
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it('should throw an error when used with a unit', function() {
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assert.throws(function () { math.sign(math.unit('5cm')); });
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});
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it('should throw an error when used with a string', function() {
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assert.throws(function () { math.sign("hello world"); });
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});
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it('should return a matrix of the signs of each elements in the given array', function() {
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assert.deepEqual(math.sign([-2,-1,0,1,2]), [-1,-1,0,1,1]);
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});
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it('should return a matrix of the signs of each elements in the given matrix', function() {
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assert.deepEqual(math.sign(math.matrix([-2,-1,0,1,2])), math.matrix([-1,-1,0,1,1]));
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});
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it('should throw an error in case of invalid number of arguments', function() {
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assert.throws(function () {math.sign()}, /TypeError: Too few arguments/);
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assert.throws(function () {math.sign(1, 2)}, /TypeError: Too many arguments/);
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});
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it('should LaTeX sign', function () {
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var expression = math.parse('sign(-4)');
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assert.equal(expression.toTex(), '\\mathrm{sign}\\left({-{4}}\\right)');
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});
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});
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