mirror of
https://github.com/josdejong/mathjs.git
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66 lines
2.4 KiB
JavaScript
66 lines
2.4 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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csch = math.csch;
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describe('csch', function() {
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it('should return the csch of a boolean', function () {
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approx.equal(csch(true), 0.85091812823932);
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approx.equal(csch(false), Number.NaN);
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});
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it('should return the csch of a number', function() {
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approx.equal(csch(0), Number.NaN);
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approx.equal(csch(pi), 0.086589537530047);
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approx.equal(csch(1), 0.85091812823932);
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approx.equal(csch(2), 0.27572056477178);
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approx.equal(csch(3), 0.099821569668823);
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approx.equal(csch(3), 0.099821569668823);
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approx.equal(csch(1e-22), Number.POSITIVE_INFINITY);
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approx.equal(csch(-1e-22), Number.NEGATIVE_INFINITY);
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});
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it('should return the csch of a bignumber (downgrades to number)', function() {
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approx.equal(csch(math.bignumber(1)), 0.85091812823932);
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});
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it('should return the csch of a complex number', function() {
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approx.deepEqual(csch(complex('1')), complex(0.85091812823932, 0));
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approx.deepEqual(csch(complex('i')), complex(0, -1.1883951057781));
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approx.deepEqual(csch(complex('2 + i')), complex(0.14136302161241, -0.22837506559969));
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});
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it('should return the csch of an angle', function() {
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approx.equal(csch(unit('90deg')), 0.4345372080947);
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approx.equal(csch(unit('-45deg')), -1.1511838709208);
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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 () {csch(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 () {csch('string')});
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});
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var csch123 = [0.85091812823932, 0.27572056477178, 0.099821569668823];
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it('should return the csch of each element of an array', function() {
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approx.deepEqual(csch([1,2,3]), csch123);
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});
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it('should return the csch of each element of a matrix', function() {
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approx.deepEqual(csch(matrix([1,2,3])), matrix(csch123));
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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 () {csch()}, error.ArgumentsError);
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assert.throws(function () {csch(1, 2)}, error.ArgumentsError);
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});
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});
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