mediawiki-skins-MinervaNeue/tests/qunit/skins.minerva.scripts/test_AB.js

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( function ( M ) {
var AB = M.require( 'skins.minerva.scripts/AB' ),
aBName = 'WME.MinervaABTest',
samplingRate = 0.5;
QUnit.module( 'Minerva AB-test' );
QUnit.test( 'Bucketing test', function ( assert ) {
var userBuckets = {
control: 0,
A: 0,
B: 0
},
maxUsers = 1000,
bucketingTest,
i;
for ( i = 0; i < maxUsers; i++ ) {
bucketingTest = new AB( aBName, samplingRate, mw.user.generateRandomSessionId() );
userBuckets[ bucketingTest.getBucket() ] += 1;
}
assert.strictEqual(
( userBuckets.control / maxUsers > 0.4 ) &&
( userBuckets.control / maxUsers < 0.6 ),
true, 'test control group is about 50% (' + userBuckets.control / 10 + '%)' );
assert.strictEqual(
( userBuckets.A / maxUsers > 0.2 ) &&
( userBuckets.A / maxUsers < 0.3 ),
true, 'test group A is about 25% (' + userBuckets.A / 10 + '%)' );
assert.strictEqual(
( userBuckets.B / maxUsers > 0.2 ) &&
( userBuckets.B / maxUsers < 0.3 ),
true, 'test group B is about 25% (' + userBuckets.B / 10 + '%)' );
} );
}( mw.mobileFrontend ) );