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diff --git a/www/wiki/extensions/MultimediaViewer/tests/qunit/mmv/provider/mmv.provider.ThumbnailInfo.test.js b/www/wiki/extensions/MultimediaViewer/tests/qunit/mmv/provider/mmv.provider.ThumbnailInfo.test.js
new file mode 100644
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+++ b/www/wiki/extensions/MultimediaViewer/tests/qunit/mmv/provider/mmv.provider.ThumbnailInfo.test.js
@@ -0,0 +1,165 @@
+/*
+ * This file is part of the MediaWiki extension MultimediaViewer.
+ *
+ * MultimediaViewer is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * MultimediaViewer is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with MultimediaViewer.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+( function ( mw, $ ) {
+	QUnit.module( 'mmv.provider.ThumbnailInfo', QUnit.newMwEnvironment() );
+
+	QUnit.test( 'ThumbnailInfo constructor sanity check', function ( assert ) {
+		var api = { get: function () {} },
+			thumbnailInfoProvider = new mw.mmv.provider.ThumbnailInfo( api );
+
+		assert.ok( thumbnailInfoProvider );
+	} );
+
+	QUnit.test( 'ThumbnailInfo get test', function ( assert ) {
+		var apiCallCount = 0,
+			api = { get: function () {
+				apiCallCount++;
+				return $.Deferred().resolve( {
+					query: {
+						pages: {
+							'-1': {
+								ns: 6,
+								title: 'File:Stuff.jpg',
+								missing: '',
+								imagerepository: 'shared',
+								imageinfo: [
+									{
+										thumburl: 'https://upload.wikimedia.org/wikipedia/commons/thumb/1/19/Stuff.jpg/51px-Stuff.jpg',
+										thumbwidth: 95,
+										thumbheight: 200,
+										url: 'https://upload.wikimedia.org/wikipedia/commons/1/19/Stuff.jpg',
+										descriptionurl: 'https://commons.wikimedia.org/wiki/File:Stuff.jpg'
+									}
+								]
+							}
+						}
+					}
+				} );
+			} },
+			file = new mw.Title( 'File:Stuff.jpg' ),
+			thumbnailInfoProvider = new mw.mmv.provider.ThumbnailInfo( api );
+
+		return thumbnailInfoProvider.get( file, 100 ).then( function ( thumbnail ) {
+			assert.strictEqual( thumbnail.url,
+				'https://upload.wikimedia.org/wikipedia/commons/thumb/1/19/Stuff.jpg/51px-Stuff.jpg',
+				'URL is set correctly' );
+			assert.strictEqual( thumbnail.width, 95, 'actual width is set correctly' );
+			assert.strictEqual( thumbnail.height, 200, 'actual height is set correctly' );
+		} ).then( function () {
+			assert.strictEqual( apiCallCount, 1 );
+			// call the data provider a second time to check caching
+			return thumbnailInfoProvider.get( file, 100 );
+		} ).then( function () {
+			assert.strictEqual( apiCallCount, 1 );
+			// call a third time with different size to check caching
+			return thumbnailInfoProvider.get( file, 110 );
+		} ).then( function () {
+			assert.strictEqual( apiCallCount, 2 );
+			// call it again, with a height specified, to check caching
+			return thumbnailInfoProvider.get( file, 110, 100 );
+		} ).then( function () {
+			assert.strictEqual( apiCallCount, 3 );
+		} );
+	} );
+
+	QUnit.test( 'ThumbnailInfo fail test', function ( assert ) {
+		var api = { get: function () {
+				return $.Deferred().resolve( {} );
+			} },
+			file = new mw.Title( 'File:Stuff.jpg' ),
+			done = assert.async(),
+			thumbnailInfoProvider = new mw.mmv.provider.ThumbnailInfo( api );
+
+		thumbnailInfoProvider.get( file, 100 ).fail( function () {
+			assert.ok( true, 'promise rejected when no data is returned' );
+			done();
+		} );
+	} );
+
+	QUnit.test( 'ThumbnailInfo fail test 2', function ( assert ) {
+		var api = { get: function () {
+				return $.Deferred().resolve( {
+					query: {
+						pages: {
+							'-1': {
+								title: 'File:Stuff.jpg'
+							}
+						}
+					}
+				} );
+			} },
+			file = new mw.Title( 'File:Stuff.jpg' ),
+			done = assert.async(),
+			thumbnailInfoProvider = new mw.mmv.provider.ThumbnailInfo( api );
+
+		thumbnailInfoProvider.get( file, 100 ).fail( function () {
+			assert.ok( true, 'promise rejected when imageinfo is missing' );
+			done();
+		} );
+	} );
+
+	QUnit.test( 'ThumbnailInfo missing page test', function ( assert ) {
+		var api = { get: function () {
+				return $.Deferred().resolve( {
+					query: {
+						pages: {
+							'-1': {
+								title: 'File:Stuff.jpg',
+								missing: '',
+								imagerepository: ''
+							}
+						}
+					}
+				} );
+			} },
+			file = new mw.Title( 'File:Stuff.jpg' ),
+			done = assert.async(),
+			thumbnailInfoProvider = new mw.mmv.provider.ThumbnailInfo( api );
+
+		thumbnailInfoProvider.get( file ).fail( function ( errorMessage ) {
+			assert.strictEqual( errorMessage, 'file does not exist: File:Stuff.jpg',
+				'error message is set correctly for missing file' );
+			done();
+		} );
+	} );
+
+	QUnit.test( 'ThumbnailInfo fail test 3', function ( assert ) {
+		var api = { get: function () {
+				return $.Deferred().resolve( {
+					query: {
+						pages: {
+							'-1': {
+								title: 'File:Stuff.jpg',
+								imageinfo: [
+									{}
+								]
+							}
+						}
+					}
+				} );
+			} },
+			file = new mw.Title( 'File:Stuff.jpg' ),
+			done = assert.async(),
+			thumbnailInfoProvider = new mw.mmv.provider.ThumbnailInfo( api );
+
+		thumbnailInfoProvider.get( file, 100 ).fail( function () {
+			assert.ok( true, 'promise rejected when thumbnail info is missing' );
+			done();
+		} );
+	} );
+}( mediaWiki, jQuery ) );