mirror of
https://github.com/josdejong/mathjs.git
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93 lines
3.2 KiB
JavaScript
93 lines
3.2 KiB
JavaScript
var assert = require('assert'),
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approx = require('../../../tools/approx'),
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math = require('../../../index'),
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bignumber = math.bignumber,
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median = math.median;
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describe('median', function() {
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it('should return the median of an even number of numbers', function() {
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assert.equal(median(3,1), 2);
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assert.equal(median(1,3), 2);
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approx.equal(median(1,3,5,2), 2.5);
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assert.equal(median(0,0,0,0), 0);
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});
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it('should return the median of an odd number of numbers', function() {
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assert.equal(median(0), 0);
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assert.equal(median(5), 5);
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approx.equal(median(1,3,5,2,-1), 2);
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assert.equal(median(0,0,0), 0);
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});
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it('should return the median of an even number of bignumbers', function() {
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assert.deepEqual(median(bignumber(1),bignumber(4),bignumber(5),bignumber(2)),
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bignumber(3));
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});
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it('should return the median of an odd number of bignumbers', function() {
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assert.deepEqual(median(bignumber(1),bignumber(4),bignumber(2)),
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bignumber(2));
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});
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it('should return the median from an array', function() {
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assert.equal(median([1,3,5,2,-5]), 2);
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});
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it('should return the median of units', function() {
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assert.deepEqual(median([math.unit('5mm'), math.unit('15mm'), math.unit('10mm')]), math.unit('10mm'));
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assert.deepEqual(median([math.unit('5mm'), math.unit('30mm'), math.unit('20mm'), math.unit('10mm')]), math.unit('15mm'));
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});
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it('should return the median from an 1d matrix', function() {
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assert.equal(median(math.matrix([1,3,5,2,-5])), 2);
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});
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it('should return the median from a 2d array', function() {
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approx.equal(median([
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[ 1, 4, 7],
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[ 3, 0, 5]
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]), 3.5);
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});
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it('should return the median from a 2d matrix', function() {
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approx.equal(median(math.matrix([
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[ 1, 4, 7],
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[ 3, 0, 5]
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])), 3.5);
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});
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it('should throw an error if called with invalid number of arguments', function() {
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assert.throws(function() {median()});
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assert.throws(function() {median([], 2, 3)});
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});
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it('should throw an error if called with not yet supported argument dim', function() {
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assert.throws(function() {median([], 2)}, /not yet supported/);
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});
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it('should throw an error if called with unsupported type of arguments', function() {
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assert.throws(function () {median('A', 'C', 'D', 'B')}, math.error.UnsupportedTypeError);
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assert.throws(function () {median('A', 'C', 'B')}, math.error.UnsupportedTypeError);
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assert.throws(function () {median(true, false, true)}, math.error.UnsupportedTypeError);
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assert.throws(function () {median(0, 'B')}, math.error.UnsupportedTypeError);
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assert.throws(function () {median(math.complex(2,3), math.complex(-1,2))}, TypeError); // TODO: for some reason the test fails when expecting math.error.UnsupportedTypeError
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});
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it('should throw an error if called with an empty array', function() {
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assert.throws(function() {median([])});
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});
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it('should not mutate the input', function () {
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var a = [3,2,1];
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var b = median(a);
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assert.deepEqual(a,[3,2,1]);
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});
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it('should LaTeX median', function () {
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var expression = math.parse('median(1,2,3,4)');
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assert.equal(expression.toTex(), '\\mathrm{median}\\left(1,2,3,4\\right)');
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});
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});
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