import {
getStats,
getBasicStats,
guid
} from '../../src/math/stats';
/**
* Tests for the 'math/stats.js' file.
*/
/* global QUnit */
QUnit.module('math');
/**
* Tests for {@link getBasicStats}.
*
* @function module:tests/math~getbasicstats
*/
QUnit.test('getBasicStats', function (assert) {
const arr0 = [1, 2, 3, 4, 5];
const q0 = getBasicStats(arr0);
// min
assert.equal(q0.min, 1, 'min.0');
// max
assert.equal(q0.max, 5, 'max.0');
// mean
assert.equal(q0.mean, 3, 'mean.0');
// stdDev
assert.equal(q0.stdDev, 1.4142135623730951, 'stdDev.0');
const arr1 = [9, 2, 5, 4, 12, 7, 8, 11, 9, 3, 7, 4, 12, 5, 4, 10, 9, 6, 9, 4];
const q1 = getBasicStats(arr1);
// min
assert.equal(q1.min, 2, 'min.1');
// max
assert.equal(q1.max, 12, 'max.1');
// mean
assert.equal(q1.mean, 7, 'mean.1');
// stdDev
assert.equal(q1.stdDev, 2.9832867780352594, 'stdDev.1');
});
/**
* Tests for {@link getFullStats}.
*
* @function module:tests/math~getfullstats
*/
QUnit.test('getFullStats', function (assert) {
const arr0 = [15, 20, 35, 40, 50];
const q0 = getStats(arr0, ['median']);
// median
assert.equal(q0.median, 35, 'median.0');
// p25
assert.equal(q0.p25, 20, 'p25.0');
// p75
assert.equal(q0.p75, 40, 'p75.0');
const arr1 = [15, 20, 35, 40, 50, 60];
const q1 = getStats(arr1, ['median']);
// median
assert.equal(q1.median, 37.5, 'median.1');
// p25
assert.equal(q1.p25, 23.75, 'p25.1');
// p75
assert.equal(q1.p75, 47.5, 'p75.1');
});
/**
* Tests for {@link guid}.
*
* @function module:tests/math~guid
*/
QUnit.test('GUID', function (assert) {
const id0 = guid();
const id1 = guid();
assert.equal((id0 === id1), false, 'Two GUids should not be equal.');
let duplicates = 0;
// create an array of guids
const ids = [];
for (let i = 0; i < 1000; ++i) {
ids[ids.length] = guid();
}
// check duplicates
let id = 0;
for (let i = 0; i < ids.length - 1; ++i) {
id = ids.pop();
if (ids.indexOf(id) !== -1) {
++duplicates;
}
}
assert.equal(duplicates, 0, '1000 GUids should not be equal.');
});