mirror of
https://github.com/josdejong/mathjs.git
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91 lines
3.2 KiB
JavaScript
91 lines
3.2 KiB
JavaScript
var assert = require('assert'),
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error = require('../../../lib/error/index'),
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math = require('../../../index'),
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approx = require('../../../tools/approx'),
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pi = math.pi,
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complex = math.complex,
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matrix = math.matrix,
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unit = math.unit,
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sinh = math.sinh;
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describe('sinh', function() {
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it('should return the sinh of a boolean', function () {
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approx.equal(sinh(true), 1.1752011936438014);
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approx.equal(sinh(false), 0);
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});
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it('should return the sinh of a null', function () {
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approx.equal(sinh(null), 0);
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});
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it('should return the sinh of a number', function() {
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approx.equal(sinh(0), 0);
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approx.equal(sinh(pi), 11.548739357257748);
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approx.equal(sinh(1), 1.1752011936438014);
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});
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it('should return the sinh of very small numbers (avoid returning zero)', function() {
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// If sinh returns 0, that is bad, so we are using assert.equal, not approx.equal
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assert.equal(sinh(-1e-10), -1e-10);
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assert.equal(sinh(1e-50), 1e-50);
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})
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it('should return the sinh of a bignumber', function() {
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var bigmath = math.create({number: 'bignumber', precision: 20});
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var Big = bigmath.bignumber;
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var arg1 = Big(-1);
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var arg6 = Big(Infinity);
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var arg7 = Big(-Infinity);
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assert.deepEqual(sinh(arg1), Big('-1.1752011936438014569'));
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assert.deepEqual(sinh(Big(0)), Big(0));
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assert.deepEqual(sinh(bigmath.pi).toString(), '11.548739357257748378');
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assert.deepEqual(sinh(Big(1)), Big('1.1752011936438014569'));
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assert.deepEqual(sinh(Big(-1e-10)), Big(-1e-10));
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assert.deepEqual(sinh(arg6), Big(Infinity));
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assert.deepEqual(sinh(arg7), Big(-Infinity));
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// Ensure args were not changed
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assert.deepEqual(arg1, Big(-1));
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assert.deepEqual(arg6, Big(Infinity));
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assert.deepEqual(arg7, Big(-Infinity));
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bigmath.config({precision: 50});
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assert.deepEqual(sinh(Big(1e-50)), Big(1e-50));
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});
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it('should return the sinh of a complex number', function() {
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approx.deepEqual(sinh(complex('1')), complex(1.1752011936438014, 0));
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approx.deepEqual(sinh(complex('i')), complex(0, 0.8414709848079));
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approx.deepEqual(sinh(complex('2 + i')), complex(1.9596010414216, 3.1657785132162));
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});
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it('should return the sinh of an angle', function() {
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approx.equal(sinh(unit('90deg')), 2.3012989023073);
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approx.equal(sinh(unit('-45deg')), -0.86867096148601);
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});
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it('should throw an error if called with an invalid unit', function() {
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assert.throws(function () {sinh(unit('5 celsius'))});
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});
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it('should throw an error if called with a string', function() {
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assert.throws(function () {sinh('string')});
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});
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var sinh123 = [1.1752011936438014, 3.626860407847, 10.01787492741];
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it('should return the sinh of each element of an array', function() {
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approx.deepEqual(sinh([1,2,3]), sinh123);
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});
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it('should return the sinh of each element of a matrix', function() {
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approx.deepEqual(sinh(matrix([1,2,3])), matrix(sinh123));
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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 () {sinh()}, error.ArgumentsError);
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assert.throws(function () {sinh(1, 2)}, error.ArgumentsError);
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});
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});
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