mediawiki-extensions-Popups/tests/node-qunit/instrumentation/statsv.test.js

import * as stubs from './../stubs';
import { isEnabled } from '../../../src/instrumentation/statsv';

QUnit.module( 'ext.popups/instrumentation/statsv' );

QUnit.test( '#isEnabled', function ( assert ) {
	const user = stubs.createStubUser(),
		config = stubs.createStubMap(),
		weightedBooleanStub = this.sandbox.stub(),
		experiments = {
			weightedBoolean: weightedBooleanStub
		};

	config.set( 'wgPopupsStatsvSamplingRate', 0.3141 );

	isEnabled( user, config, experiments );

	assert.strictEqual(
		weightedBooleanStub.callCount,
		1,
		'The experiments object is called.'
	);
	assert.deepEqual(
		weightedBooleanStub.getCall( 0 ).args,
		[
			'ext.Popups.statsv',
			config.get( 'wgPopupsStatsvSamplingRate' ),
			user.sessionId()
		],
		'The experiments object is called with the correct arguments.'
	);

	// ---

	config.delete( 'wgPopupsStatsvSamplingRate' );

	const defaultResult = isEnabled( user, config, experiments );
	assert.strictEqual(
		defaultResult,
		false,
		'The bucketing is disabled by default.'
	);
	assert.strictEqual(
		weightedBooleanStub.callCount,
		1,
		'The experiments object is not called when bucketing rate is the default 0.'
	);
} );