experiments.test.js
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experiments.test.js
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	import createExperiments from '../../src/experiments';

	QUnit.module( 'ext.popups/experiments#weightedBoolean' );

	QUnit.test( 'it should call mw.experiments#getBucket', function ( assert ) {
	const getBucketStub = this.sandbox.stub(),
	stubMWExperiments = {
	getBucket: getBucketStub
	},
	experiments = createExperiments( stubMWExperiments );

	experiments.weightedBoolean( 'foo', 0.2, 'barbaz' );

	assert.strictEqual(
	getBucketStub.callCount,
	1,
	'The bucketer was invoked once.'
	);
	assert.deepEqual(
	getBucketStub.getCall( 0 ).args,
	[
	{
	enabled: true,

	name: 'foo',
	buckets: {
	true: 0.2,
	false: 0.8 // 1 - 0.2
	}
	},
	'barbaz'
	],
	'The bucketer was called with the correct arguments.'
	);

	// ---

	getBucketStub.returns( 'true' );

	assert.true(
	experiments.weightedBoolean( 'foo', 0.2, 'barbaz' ),
	'It should return true if the bucket is "true".'
	);
	} );