ImageGateway.test.js
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ImageGateway.test.js
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	let sandbox, ImageGateway, findSizeBucket;
	const
	sinon = require( 'sinon' ),
	dom = require( '../utils/dom' ),
	mediaWiki = require( '../utils/mw' ),
	jQuery = require( '../utils/jQuery' ),
	util = require( '../../../src/mobile.startup/util' );

	QUnit.module( 'MobileFrontend mobile.mediaViewer/ImageGateway', {
	beforeEach: function () {
	sandbox = sinon.sandbox.create();
	dom.setUp( sandbox, global );
	jQuery.setUp( sandbox, global );
	mediaWiki.setUp( sandbox, global );
	ImageGateway = require( '../../../src/mobile.mediaViewer/ImageGateway' );
	findSizeBucket = ImageGateway._findSizeBucket;
	},
	afterEach: function () {
	jQuery.tearDown();
	sandbox.restore();
	}
	} );

	QUnit.test( '#findSizeBucket', function ( assert ) {
	assert.strictEqual( findSizeBucket( 300 ), 320, 'value lower than bucket' );
	assert.strictEqual( findSizeBucket( 800 ), 800, 'exact value' );
	assert.strictEqual( findSizeBucket( 9999 ), 2880, 'value greater than last bucket' );
	} );

	QUnit.test( 'ImageGateway#getThumb (missing page)', function ( assert ) {
	const api = {
	get: function () {
	return util.Deferred().resolve( {
	query: {
	pages: [
	{
	title: 'Hello',
	missing: true
	}
	]
	}
	} );
	}
	},
	gateway = new ImageGateway( { api: api } );
	assert.rejects(
	gateway.getThumb( 'Missing' ),
	function ( err ) {
	return err.message.includes( 'The API failed' );
	},
	'A missing page throws an error which the client must handle'
	);
	} );