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67 lines
2.3 KiB
JavaScript
67 lines
2.3 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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sech = math.sech;
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describe('sech', function() {
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it('should return the sech of a boolean', function () {
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approx.equal(sech(true), 0.64805427366389);
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approx.equal(sech(false), 1);
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});
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it('should return the sech of null', function () {
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approx.equal(sech(null), 1);
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});
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it('should return the sech of a number', function() {
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approx.equal(sech(0), 1);
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approx.equal(sech(pi), 0.086266738334054);
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approx.equal(sech(1), 0.64805427366389);
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approx.equal(sech(2), 0.26580222883408);
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approx.equal(sech(3), 0.099327927419433);
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});
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it('should return the sech of a bignumber (downgrades to number)', function() {
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approx.equal(sech(math.bignumber(1)), 0.64805427366389);
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});
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it('should return the sech of a complex number', function() {
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approx.deepEqual(sech(complex('1')), complex(0.64805427366389, 0));
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approx.deepEqual(sech(complex('i')), complex(1.8508157176809, 0));
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approx.deepEqual(sech(complex('2 + i')), complex(0.15117629826558, -0.22697367539372));
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});
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it('should return the sech of an angle', function() {
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approx.equal(sech(unit('90deg')), 0.39853681533839);
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approx.equal(sech(unit('-45deg')), 0.75493970871413);
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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 () {sech(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 () {sech('string')});
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});
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var sech123 = [0.64805427366389, 0.26580222883408, 0.099327927419433];
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it('should return the sech of each element of an array', function() {
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approx.deepEqual(sech([1,2,3]), sech123);
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});
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it('should return the sech of each element of a matrix', function() {
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approx.deepEqual(sech(matrix([1,2,3])), matrix(sech123));
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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 () {sech()}, error.ArgumentsError);
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assert.throws(function () {sech(1, 2)}, error.ArgumentsError);
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});
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});
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