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distiller.test.js
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/*
* Copyright 2024 Adobe. All rights reserved.
* This file is licensed to you under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License. You may obtain a copy
* of the License at http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under
* the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS
* OF ANY KIND, either express or implied. See the License for the specific language
* governing permissions and limitations under the License.
*/
import { describe, it } from 'node:test';
import assert from 'node:assert/strict';
import { readFileSync } from 'node:fs';
import { DataChunks } from '../distiller.js';
import { addCalculatedProps } from '../utils.js';
import { zTestTwoProportions } from '../stats.js';
// Load fixture data
const fixturePath = new URL('cruncher.fixture.json', import.meta.url);
const chunks = JSON.parse(readFileSync(fixturePath));
describe('cruncher.js helper functions', () => {
it('addCalculatedProps()', () => {
const bundle = {
id: '37Rfpw',
host: 'www.aem.live',
time: '2024-05-06T05:00:06.668Z',
timeSlot: '2024-05-06T05:00:00.000Z',
url: 'https://www.aem.live/developer/tutorial',
userAgent: 'desktop:mac',
weight: 100,
events: [
{
checkpoint: 'viewmedia',
target: 'https://www.aem.live/developer/media_1c03ad909a87a4e318a33e780b93e4a1f8e7581a3.png',
timeDelta: 6668.300048828125,
},
{
checkpoint: 'cwv-ttfb',
value: 116.40000009536743,
timeDelta: 4157.60009765625,
},
{
checkpoint: 'cwv-inp',
value: 24,
timeDelta: 22433,
},
{
checkpoint: 'loadresource',
target: 13,
source: 'https://www.aem.live/side-navigation.plain.html',
timeDelta: 2146.60009765625,
},
{
checkpoint: 'cwv',
timeDelta: 3405.699951171875,
},
{
checkpoint: 'loadresource',
target: 1,
source: 'https://www.aem.live/new-footer.plain.html',
timeDelta: 2146.300048828125,
},
{
checkpoint: 'viewmedia',
target: 'https://www.aem.live/developer/media_10ba61a1d511624419dcef8791a7ef1e2d4be517a.png',
timeDelta: 2669.800048828125,
},
{
checkpoint: 'viewmedia',
target: 'https://www.aem.live/developer/media_10f4cf14edeb95728a5fe54816167b7bfdd84b470.png',
timeDelta: 13955.60009765625,
},
{
checkpoint: 'cwv-cls',
value: 0.08819350790051111,
timeDelta: 22433.199951171875,
},
{
checkpoint: 'viewblock',
source: '.side-navigation',
timeDelta: 2263.800048828125,
},
{
checkpoint: 'viewblock',
source: '.video',
timeDelta: 14990,
},
{
checkpoint: 'cwv-lcp',
value: 449.60000002384186,
timeDelta: 22299.89990234375,
},
{
checkpoint: 'load',
timeDelta: 340.39990234375,
},
{
checkpoint: 'viewmedia',
target: 'https://www.aem.live/developer/media_1228880ca4b47272dfeff138bbc65e21ea7280ae2.png',
timeDelta: 13113.800048828125,
},
{
checkpoint: 'viewmedia',
target: 'https://www.hlx.live/developer/videos/tutorial-step1.mp4',
source: '.video',
timeDelta: 2152.10009765625,
},
{
checkpoint: 'viewblock',
source: '.video',
timeDelta: 2153.5,
},
{
checkpoint: 'navigate',
target: 'visible',
source: 'https://www.aem.live/home',
timeDelta: 2144.39990234375,
},
{
checkpoint: 'viewmedia',
target: 'https://www.aem.live/developer/media_1ac52277bb9463586a7cc3608c6bed2fb7fd3d10e.png',
timeDelta: 17293.39990234375,
},
{
checkpoint: 'cwv-fid',
value: 17.600000023841858,
timeDelta: 22301.60009765625,
},
{
checkpoint: 'leave',
timeDelta: 22432.699951171875,
},
{
checkpoint: 'lazy',
timeDelta: 397.10009765625,
},
{
checkpoint: 'viewmedia',
target: 'https://www.aem.live/developer/media_18d1c2a9ecd6557f129e41b42a03a8dfbff1e27e9.png',
timeDelta: 2152.800048828125,
},
{
checkpoint: 'loadresource',
target: 2,
source: 'https://www.aem.live/new-nav.plain.html',
timeDelta: 2145.800048828125,
},
{
checkpoint: 'top',
target: 'visible',
timeDelta: 156.300048828125,
},
{
checkpoint: 'viewblock',
source: '.header',
timeDelta: 2153.199951171875,
},
],
cwvTTFB: 116.40000009536743,
cwvINP: 24,
cwvCLS: 0.08819350790051111,
cwvLCP: 449.60000002384186,
};
const after = addCalculatedProps(bundle);
assert.equal(after.visit, undefined);
assert.equal(after.conversion, undefined);
assert.equal(after.cwvINP, 24);
});
it('zTestTwoProportions()', () => {
const p = zTestTwoProportions(100, 1000, 100, 1000);
assert.equal(p, 1);
});
});
describe('DataChunks', () => {
it('new DataChunks()', async () => {
const d = new DataChunks();
assert.ok(d);
});
it('DataChunk.load()', () => {
// load test chunks from cruncher.fixture.json
const testFile = new URL('cruncher.fixture.json', import.meta.url);
const testChunks = JSON.parse(readFileSync(testFile));
const d = new DataChunks();
d.load(testChunks);
assert.equal(d.data.length, 31);
});
it('DataChunk.bundles', () => {
// load test chunks from cruncher.fixture.json
const testFile = new URL('cruncher.fixture.json', import.meta.url);
const testChunks = JSON.parse(readFileSync(testFile));
const d = new DataChunks();
d.load(testChunks);
assert.equal(d.bundles.length, 969);
});
it('DataChunk.bundles (repeat)', () => {
// load test chunks from cruncher.fixture.json
const testFile = new URL('cruncher.fixture.json', import.meta.url);
const testChunks = JSON.parse(readFileSync(testFile));
const d = new DataChunks();
d.load(testChunks);
assert.equal(d.bundles.length, 969);
assert.equal(d.bundles.length, 969);
assert.equal(d.bundles.length, 969);
});
it('DataChunk.addData()', () => {
const chunks1 = [
{
date: '2024-05-06',
rumBundles: [
{
id: 'one',
host: 'www.aem.live',
time: '2024-05-06T00:00:04.444Z',
timeSlot: '2024-05-06T00:00:00.000Z',
url: 'https://www.aem.live/home',
userAgent: 'desktop:windows',
weight: 100,
events: [
{
checkpoint: 'top',
target: 'visible',
timeDelta: 4444.5,
},
],
},
],
},
];
const chunks2 = [
{
date: '2024-05-06',
rumBundles: [
{
id: 'two',
host: 'www.aem.live',
time: '2024-05-06T00:00:04.444Z',
timeSlot: '2024-05-06T00:00:00.000Z',
url: 'https://www.aem.live/home',
userAgent: 'desktop:windows',
weight: 100,
events: [
{
checkpoint: 'top',
target: 'visible',
timeDelta: 4444.5,
},
],
},
],
},
];
const d = new DataChunks();
d.load(chunks1);
assert.equal(d.bundles.length, 1);
d.addData(chunks2);
assert.equal(d.bundles.length, 2);
});
it('DataChunk.filter()', () => {
const chunks1 = [
{
date: '2024-05-06',
rumBundles: [
{
id: 'one',
host: 'www.aem.live',
time: '2024-05-06T00:00:04.444Z',
timeSlot: '2024-05-06T00:00:00.000Z',
url: 'https://www.aem.live/home',
userAgent: 'desktop:windows',
weight: 100,
events: [
{
checkpoint: 'top',
target: 'visible',
timeDelta: 4444.5,
},
],
},
],
},
];
const chunks2 = [
{
date: '2024-05-06',
rumBundles: [
{
id: 'two',
host: 'www.aem.live',
time: '2024-05-06T00:00:04.444Z',
timeSlot: '2024-05-06T00:00:00.000Z',
url: 'https://www.aem.live/home',
userAgent: 'desktop:windows',
weight: 100,
events: [
{
checkpoint: 'top',
target: 'visible',
timeDelta: 4444.5,
},
],
},
],
},
];
const d = new DataChunks();
d.load(chunks1);
d.addData(chunks2);
d.addFacet('all', () => 'true');
d.addFacet('none', () => 'false');
d.addFacet('id', (bundle) => bundle.id);
d.filter = {
all: ['true'],
};
assert.equal(d.filtered.length, 2);
d.filter = {
none: ['true'],
};
assert.equal(d.filtered.length, 0);
d.filter = {
id: ['one'],
};
assert.equal(d.filtered.length, 1);
d.filter = {
// trying to filter with an undefined facet
unknown: ['unknown'],
};
assert.equal(d.filtered.length, 0);
});
it('DataChunk.group()', () => {
const chunks1 = [
{
date: '2024-05-06',
rumBundles: [
{
id: 'one',
host: 'www.aem.live',
time: '2024-05-06T00:00:04.444Z',
timeSlot: '2024-05-06T00:00:00.000Z',
url: 'https://www.aem.live/home',
userAgent: 'desktop:windows',
weight: 100,
events: [
{
checkpoint: 'top',
target: 'visible',
timeDelta: 100,
},
],
},
{
id: 'two',
host: 'www.aem.live',
time: '2024-05-06T00:00:04.444Z',
timeSlot: '2024-05-06T00:00:00.000Z',
url: 'https://www.aem.live/home',
userAgent: 'desktop:windows',
weight: 100,
events: [
{
checkpoint: 'top',
target: 'hidden',
timeDelta: 200,
},
],
},
],
},
];
const d = new DataChunks();
d.load(chunks1);
const grouped = d.group((bundle) => bundle.id);
assert.equal(grouped.one.length, 1);
assert.equal(grouped.two.length, 1);
const groupedbydisplay = d.group((bundle) => bundle.events.find((e) => e.checkpoint === 'top')?.target);
assert.equal(groupedbydisplay.visible.length, 1);
assert.equal(groupedbydisplay.hidden.length, 1);
});
it('DataChunk.totals()', () => {
const chunks1 = [
{
date: '2024-05-06',
rumBundles: [
{
id: 'one',
host: 'www.aem.live',
time: '2024-05-06T00:00:04.444Z',
timeSlot: '2024-05-06T00:00:00.000Z',
url: 'https://www.aem.live/home',
userAgent: 'desktop:windows',
weight: 100,
events: [
{
checkpoint: 'top',
target: 'visible',
timeDelta: 100,
},
],
},
{
id: 'two',
host: 'www.aem.live',
time: '2024-05-06T00:00:04.444Z',
timeSlot: '2024-05-06T00:00:00.000Z',
url: 'https://www.aem.live/home',
userAgent: 'desktop:windows',
weight: 100,
events: [
{
checkpoint: 'top',
target: 'hidden',
timeDelta: 200,
},
{
checkpoint: 'click',
},
],
},
],
},
];
const d = new DataChunks();
d.load(chunks1);
// define two series
d.addSeries('toptime', (bundle) => bundle.events.find((e) => e.checkpoint === 'top')?.timeDelta);
d.addSeries('clickcount', (bundle) => bundle.events.filter((e) => e.checkpoint === 'click').length);
// get totals
const { totals } = d;
// for each series, there are a number of ways to look at the aggregate
assert.equal(totals.toptime.sum, 300);
assert.equal(totals.toptime.mean, 150);
assert.equal(totals.clickcount.sum, 1);
assert.equal(totals.clickcount.mean, 0.5);
assert.equal(totals.clickcount.min, 0);
assert.equal(totals.clickcount.max, 1);
});
it('DataChunk.aggregate()', () => {
const chunks1 = [
{
date: '2024-05-06',
rumBundles: [
{
id: 'one',
host: 'www.aem.live',
time: '2024-05-06T00:00:04.444Z',
timeSlot: '2024-05-06T00:00:00.000Z',
url: 'https://www.aem.live/home',
userAgent: 'desktop:windows',
weight: 100,
events: [
{
checkpoint: 'top',
target: 'visible',
timeDelta: 100,
},
],
},
{
id: 'two',
host: 'www.aem.live',
time: '2024-05-06T00:00:04.444Z',
timeSlot: '2024-05-06T00:00:00.000Z',
url: 'https://www.aem.live/home',
userAgent: 'desktop:windows',
weight: 100,
events: [
{
checkpoint: 'top',
target: 'hidden',
timeDelta: 200,
},
{
checkpoint: 'click',
},
],
},
],
},
];
const d = new DataChunks();
d.load(chunks1);
// define two series
d.addSeries('toptime', (bundle) => bundle.events.find((e) => e.checkpoint === 'top')?.timeDelta);
d.addSeries('clickcount', (bundle) => bundle.events.filter((e) => e.checkpoint === 'click').length);
// group by display
d.group((bundle) => bundle.events.find((e) => e.checkpoint === 'top')?.target);
// get aggregates
const { aggregates } = d;
// the first level of aggregation is by group
assert.deepEqual(Object.keys(aggregates), ['visible', 'hidden']);
// the second level of aggregation is by series
assert.equal(aggregates.visible.toptime.sum, 100);
assert.equal(aggregates.hidden.toptime.sum, 200);
assert.equal(aggregates.visible.clickcount.sum, 0);
assert.equal(aggregates.hidden.clickcount.sum, 1);
// we can also compare the sum and count metrics to the parent (all) group
assert.equal(aggregates.visible.toptime.share, 1 / 2);
// percentage is calculated as the ratio of sums
assert.equal(aggregates.hidden.toptime.percentage, 2 / 3);
});
it('DataChunk.facets', () => {
const chunks1 = [
{
date: '2024-05-06',
rumBundles: [
{
id: 'one',
host: 'www.aem.live',
time: '2024-05-06T00:00:04.444Z',
timeSlot: '2024-05-06T00:00:00.000Z',
url: 'https://www.aem.live/developer/tutorial',
userAgent: 'desktop:windows',
weight: 100,
events: [
{
checkpoint: 'top',
target: 'visible',
timeDelta: 100,
},
],
},
{
id: 'two',
host: 'www.aem.live',
time: '2024-05-06T00:00:04.444Z',
timeSlot: '2024-05-06T00:00:00.000Z',
url: 'https://www.aem.live/home',
userAgent: 'desktop:windows',
weight: 100,
events: [
{
checkpoint: 'top',
target: 'hidden',
timeDelta: 200,
},
{
checkpoint: 'click',
},
],
},
{
id: 'three',
host: 'www.aem.live',
time: '2024-05-06T00:00:04.444Z',
timeSlot: '2024-05-06T00:00:00.000Z',
url: 'https://www.aem.live/home',
userAgent: 'mobile:ios',
weight: 100,
events: [
{
checkpoint: 'top',
target: 'visible',
timeDelta: 200,
},
{
checkpoint: 'viewmedia',
target: 'some_image.png',
},
],
},
],
},
];
const d = new DataChunks();
d.load(chunks1);
// define two series
d.addSeries('toptime', (bundle) => bundle.events.find((e) => e.checkpoint === 'top')?.timeDelta);
d.addSeries('clickcount', (bundle) => bundle.events.filter((e) => e.checkpoint === 'click').length);
// group by display
d.group((bundle) => bundle.events.find((e) => e.checkpoint === 'top')?.target);
// define facet functions
d.addFacet('host', (bundle) => bundle.host);
d.addFacet('url', (bundle) => bundle.url);
d.addFacet('userAgent', (bundle) => {
const parts = bundle.userAgent.split(':');
return parts.reduce((acc, _, i) => {
acc.push(parts.slice(0, i + 1).join(':'));
return acc;
}, []);
});
// set an example filter
d.filter = {
host: ['www.aem.live'],
};
// get facets
const { facets } = d;
// the first level of aggregation is by facet
assert.deepEqual(Object.keys(facets), ['host', 'url', 'userAgent']);
assert.deepEqual(facets.url.map((f) => f.value), [
// two bundles, so it comes first
'https://www.aem.live/home',
// one bundle, so it comes second
'https://www.aem.live/developer/tutorial']);
// one entry can create multiple facets, if the facet function returns an array
// so that desktop can include all desktop:* variants
assert.deepEqual(facets.userAgent.map((f) => f.value), [
'desktop',
'desktop:windows',
'mobile',
'mobile:ios',
]);
});
it('DataChunk.filter(userAgent)', () => {
const chunks1 = [
{
date: '2024-05-06',
rumBundles: [
{
id: 'one',
host: 'www.aem.live',
time: '2024-05-06T00:00:04.444Z',
timeSlot: '2024-05-06T00:00:00.000Z',
url: 'https://www.aem.live/developer/tutorial',
userAgent: 'desktop:windows',
weight: 100,
events: [
{
checkpoint: 'top',
target: 'visible',
timeDelta: 100,
},
],
},
{
id: 'two',
host: 'www.aem.live',
time: '2024-05-06T00:00:04.444Z',
timeSlot: '2024-05-06T00:00:00.000Z',
url: 'https://www.aem.live/home',
userAgent: 'desktop',
weight: 100,
events: [
{
checkpoint: 'top',
target: 'hidden',
timeDelta: 200,
},
{
checkpoint: 'click',
},
],
},
{
id: 'three',
host: 'www.aem.live',
time: '2024-05-06T00:00:04.444Z',
timeSlot: '2024-05-06T00:00:00.000Z',
url: 'https://www.aem.live/home',
userAgent: 'mobile:ios',
weight: 100,
events: [
{
checkpoint: 'top',
target: 'visible',
timeDelta: 200,
},
{
checkpoint: 'viewmedia',
target: 'some_image.png',
},
],
},
],
},
];
const d = new DataChunks();
d.load(chunks1);
// define facet functions
d.addFacet('host', (bundle) => bundle.host);
d.addFacet('userAgent', (bundle) => {
const parts = bundle.userAgent.split(':');
return parts.reduce((acc, _, i) => {
acc.push(parts.slice(0, i + 1).join(':'));
return acc;
}, []);
});
// set an example filter
d.filter = {
host: ['www.aem.live'],
userAgent: ['desktop'],
};
assert.equal(d.filtered.length, 2);
// get facets and subfacets
const { facets } = d;
// one entry can create multiple facets, if the facet function returns an array
// so that desktop can include all desktop:* variants
assert.deepEqual(facets.userAgent.map((f) => f.value), [
'desktop',
'desktop:windows',
'mobile',
'mobile:ios',
]);
});
it('DataChunk.filter(userAgent) negation', () => {
const chunks1 = [
{
date: '2024-05-06',
rumBundles: [
{
id: 'one',
host: 'www.aem.live',
time: '2024-05-06T00:00:04.444Z',
timeSlot: '2024-05-06T00:00:00.000Z',
url: 'https://www.aem.live/developer/tutorial',
userAgent: 'desktop:windows',
weight: 100,
events: [
{
checkpoint: 'top',
target: 'visible',
timeDelta: 100,
},
],
},
{
id: 'two',
host: 'www.aem.live',
time: '2024-05-06T00:00:04.444Z',
timeSlot: '2024-05-06T00:00:00.000Z',
url: 'https://www.aem.live/home',
userAgent: 'desktop',
weight: 100,
events: [
{
checkpoint: 'top',
target: 'hidden',
timeDelta: 200,
},
{
checkpoint: 'click',
},
],
},
{
id: 'three',
host: 'www.aem.live',
time: '2024-05-06T00:00:04.444Z',
timeSlot: '2024-05-06T00:00:00.000Z',
url: 'https://www.aem.live/home',
userAgent: 'mobile:ios',
weight: 100,
events: [
{
checkpoint: 'top',
target: 'visible',
timeDelta: 200,
},
{
checkpoint: 'viewmedia',
target: 'some_image.png',
},
],
},
],
},
];
const d = new DataChunks();
d.load(chunks1);
// define facet functions
d.addFacet('host', (bundle) => bundle.host);
d.addFacet(
// as a convention, we use ! to indicate negation. When used in URL parameters, this
// looks like a nice filter: ?userAgent!=desktop
'userAgent!',
(bundle) => {
const parts = bundle.userAgent.split(':');
return parts.reduce((acc, _, i) => {
acc.push(parts.slice(0, i + 1).join(':'));
return acc;
}, []);
},
// this sets up the negation filter, it means that the filter will match if at least
// one of the values in the facet is not in the filter
'none',
);
// set an example filter
d.filter = {
host: ['www.aem.live'],
// this is a negation filter
'userAgent!': ['desktop'],
};
assert.equal(d.filtered.length, 1);
});
});
describe('DataChunks.hasConversion', () => {
const testChunks = [
{
date: '2024-05-06',
rumBundles: [
{
id: 'one',
host: 'www.aem.live',
time: '2024-05-06T00:00:04.444Z',
timeSlot: '2024-05-06T00:00:00.000Z',
url: 'https://www.aem.live/developer/tutorial',
userAgent: 'desktop:windows',
weight: 100,
events: [
{
checkpoint: 'top',
target: 'visible',
timeDelta: 100,
},
],
},
{
id: 'two',
host: 'www.aem.live',
time: '2024-05-06T00:00:04.444Z',
timeSlot: '2024-05-06T00:00:00.000Z',
url: 'https://www.aem.live/home',
userAgent: 'desktop',
weight: 100,
events: [
{
checkpoint: 'top',
target: 'hidden',
timeDelta: 200,
},
{
checkpoint: 'click',
},
],
},
{
id: 'three',
host: 'www.aem.live',
time: '2024-05-06T00:00:04.444Z',
timeSlot: '2024-05-06T00:00:00.000Z',
url: 'https://www.aem.live/home',
userAgent: 'mobile:ios',
weight: 100,
events: [
{
checkpoint: 'top',
target: 'visible',
timeDelta: 200,
},
{
checkpoint: 'viewmedia',
target: 'some_image.png',
},
],
},
],
},
];
it('will tag bundles with convert and not-convert based on a filter spec', () => {
const d = new DataChunks();
d.load(testChunks);
const spec = {
facetOne: ['top'],
facetTwo: ['hidden'],
};
d.addFacet('facetOne', (bundle) => bundle.events.map((e) => e.checkpoint));
d.addFacet('facetTwo', (bundle) => bundle.events.map((e) => e.target));
const facetValueFn = (bundle) => (d.hasConversion(bundle, spec) ? 'converted' : 'not-converted');
d.addFacet('conversion', facetValueFn);
const facets = d.facets.conversion;
const converted = facets.find((f) => f.value === 'converted');
assert.equal(converted?.count, 1);
const notConverted = facets.find((f) => f.value === 'not-converted');
assert.equal(notConverted?.count, 2);
});
it('unknown facet in filter spec', () => {
const d = new DataChunks();
d.load(testChunks);
const spec = {
facetOne: ['top'],
facetTwo: ['hidden'],
// trying to filter with an undefined facet
unknowFacet: ['unknown'],
};
d.addFacet('facetOne', (bundle) => bundle.events.map((e) => e.checkpoint));
d.addFacet('facetTwo', (bundle) => bundle.events.map((e) => e.target));
const facetValueFn = (bundle) => (d.hasConversion(bundle, spec) ? 'converted' : 'not-converted');
d.addFacet('conversion', facetValueFn);
const facets = d.facets.conversion;
const converted = facets.find((f) => f.value === 'converted');
assert.equal(converted, undefined);
const notConverted = facets.find((f) => f.value === 'not-converted');
assert.equal(notConverted?.count, 3);
});
});
describe('DataChunks.addClusterFacet()', () => {
it('should create clusters based on URL facet', () => {
const d = new DataChunks();
d.load(chunks);
// Define a facet function
d.addFacet('url', (bundle) => [bundle.url]);
// Add a cluster facet based on the 'url' facet
d.addClusterFacet('urlCluster', 'url', {
count: Math.log10(d.facets.url.length),
});
const { facets } = d;
assert.ok(facets.urlCluster.length > 0);
assert.notEqual(facets.urlCluster[0].value, '[object Object]');
assert.equal(facets.urlCluster[0].value, '/developer');
assert.equal(facets.urlCluster[1].value, 'https://www.aem.live/home');
assert.equal(facets.urlCluster[2].value, 'https://www.aem.live/developer/tutorial');
});
it('should handle empty facet values gracefully', () => {
const d = new DataChunks();
d.load([]);
// Define a facet function
d.addFacet('url', (bundle) => [bundle.url]);
// Add a cluster facet based on the 'url' facet
d.addClusterFacet('urlCluster', 'url', {
count: Math.log10(d.facets.url.length),
});
const { facets } = d;
assert.equal(facets.urlCluster.length, 0);
});
it('should log the correct cluster count', () => {
const d = new DataChunks();
d.load(chunks);
// Define a facet function
d.addFacet('url', (bundle) => [bundle.url]);
// Add a cluster facet based on the 'url' facet
const count = Math.floor(Math.log10(92));
d.addClusterFacet('urlCluster', 'url', {
count,
});
// Check if the count is correct
assert.strictEqual(count, 1);
});
it('should create clusters with the most occurring cluster first', () => {
const d = new DataChunks();
d.load(chunks);
// Define a facet function
d.addFacet('url', (bundle) => [bundle.url]);
// Add a cluster facet based on the 'url' facet
d.addClusterFacet('urlCluster', 'url', {
count: Math.log10(d.facets.url.length),
});
const { facets } = d;