Add test for clicking prev/next

Change-Id: I02653d97500d5a876f142a518d9b53b0d4746aef
Mingle: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/145

MultimediaViewerHooks.php

@@ -139,6 +139,7 @@ class MultimediaViewerHooks {
 				'tests/qunit/mmv/provider/mmv.provider.UserInfo.test.js',
 				'tests/qunit/mmv/provider/mmv.provider.Image.test.js',
 				'tests/qunit/mmv/ui/mmv.ui.test.js',
+				'tests/qunit/mmv/ui/mmv.ui.buttons.test.js',
 				'tests/qunit/mmv/ui/mmv.ui.canvas.test.js',
 				'tests/qunit/mmv/ui/mmv.ui.categories.test.js',
 				'tests/qunit/mmv/ui/mmv.ui.description.test.js',

tests/qunit/mmv/mmv.test.js

@@ -1,23 +1,31 @@
 ( function ( mw, $ ) {
+	var oldSetupEventHandlers;
+
 	QUnit.module( 'mmv', QUnit.newMwEnvironment() );
 
+	// Because we don't want that throwaway instance to listen to events, could interfere with other tests
+	function newViewer() {
+		oldSetupEventHandlers = mw.mmv.MultimediaViewer.prototype.setupEventHandlers;
+		mw.mmv.MultimediaViewer.prototype.setupEventHandlers = $.noop;
+		return new mw.mmv.MultimediaViewer();
+	}
+
+	function cleanNewViewer() {
+		mw.mmv.MultimediaViewer.prototype.setupEventHandlers = oldSetupEventHandlers;
+	}
+
 	QUnit.test( 'Metadata div is only animated once', 4, function ( assert ) {
 		localStorage.removeItem( 'mmv.hasOpenedMetadata' );
 
-		var viewer,
+		var viewer = newViewer(),
 			backupAnimation = $.fn.animate,
-			animationRan = false,
-			oldSetupEventHandlers = mw.mmv.MultimediaViewer.prototype.setupEventHandlers;
+			animationRan = false;
 
 		$.fn.animate = function () {
 			animationRan = true;
 			return this;
 		};
 
-		// Because we don't want that throwaway instance to listen to events, could interfere with other tests
-		mw.mmv.MultimediaViewer.prototype.setupEventHandlers = $.noop;
-		viewer = new mw.mmv.MultimediaViewer();
-
 		viewer.animateMetadataDivOnce();
 		assert.strictEqual( viewer.hasAnimatedMetadata, true, 'The first call to animateMetadataDivOnce set hasAnimatedMetadata to true' );
 		assert.strictEqual( animationRan, true, 'The first call to animateMetadataDivOnce led to an animation' );
@@ -29,7 +37,7 @@
 
 		$.fn.animate = backupAnimation;
 
-		mw.mmv.MultimediaViewer.prototype.setupEventHandlers = oldSetupEventHandlers;
+		cleanNewViewer();
 	} );
 
 	QUnit.test( 'eachPrealoadableLightboxIndex()', 11, function ( assert ) {
@@ -155,7 +163,7 @@
 
 	QUnit.test( 'Progress', 3, function ( assert ) {
 		var imageDeferred = $.Deferred(),
-			viewer = new mw.mmv.MultimediaViewer(),
+			viewer = newViewer(),
 			oldImageGet = mw.mmv.provider.Image.prototype.get,
 			oldImageInfoGet = mw.mmv.provider.ImageInfo.prototype.get,
 			oldThumbnailInfoGet = mw.mmv.provider.ThumbnailInfo.prototype.get,
@@ -203,10 +211,12 @@
 		mw.mmv.provider.Image.prototype.get = oldImageGet;
 		mw.mmv.provider.ImageInfo.prototype.get = oldImageInfoGet;
 		mw.mmv.provider.ThumbnailInfo.prototype.get = oldThumbnailInfoGet;
+
+		cleanNewViewer();
 	} );
 
 	QUnit.test( 'resetBlurredThumbnailStates', 4, function ( assert ) {
-		var viewer = new mw.mmv.MultimediaViewer();
+		var viewer = newViewer();
 
 		assert.ok( !viewer.realThumbnailShown, 'Real thumbnail state is correct' );
 		assert.ok( !viewer.blurredThumbnailShown, 'Placeholder state is correct' );
@@ -218,10 +228,12 @@
 
 		assert.ok( !viewer.realThumbnailShown, 'Real thumbnail state is correct' );
 		assert.ok( !viewer.blurredThumbnailShown, 'Placeholder state is correct' );
+
+		cleanNewViewer();
 	} );
 
 	QUnit.test( 'Placeholder first, then real thumbnail', 4, function ( assert ) {
-		var viewer = new mw.mmv.MultimediaViewer();
+		var viewer = newViewer();
 
 		viewer.setImage = $.noop;
 		viewer.lightbox = { iface : { canvas : {
@@ -237,10 +249,12 @@
 
 		assert.ok( viewer.realThumbnailShown, 'Real thumbnail state is correct' );
 		assert.ok( viewer.blurredThumbnailShown, 'Placeholder state is correct' );
+
+		cleanNewViewer();
 	} );
 
 	QUnit.test( 'Real thumbnail first, then placeholder', 4, function ( assert ) {
-		var viewer = new mw.mmv.MultimediaViewer();
+		var viewer = newViewer();
 
 		viewer.setImage = $.noop;
 		viewer.lightbox = { iface : {
@@ -256,10 +270,12 @@
 
 		assert.ok( viewer.realThumbnailShown, 'Real thumbnail state is correct' );
 		assert.ok( !viewer.blurredThumbnailShown, 'Placeholder state is correct' );
+
+		cleanNewViewer();
 	} );
 
 	QUnit.test( 'displayRealThumbnail', 1, function ( assert ) {
-		var viewer = new mw.mmv.MultimediaViewer();
+		var viewer = newViewer();
 
 		viewer.setImage = $.noop;
 		viewer.lightbox = { iface : { canvas : {
@@ -276,12 +292,14 @@
 
 		// Should result in an unblur (image didn't come from cache)
 		viewer.displayRealThumbnail( undefined, undefined, undefined, 1000 );
+
+		cleanNewViewer();
 	} );
 
 	QUnit.test( 'New image loaded while another one is loading', 1, function ( assert ) {
 		var imageDeferred,
 			ligthboxInfoDeferred,
-			viewer = new mw.mmv.MultimediaViewer(),
+			viewer = newViewer(),
 			oldImageGet = mw.mmv.provider.Image.prototype.get,
 			oldImageInfoGet = mw.mmv.provider.ImageInfo.prototype.get,
 			oldThumbnailInfoGet = mw.mmv.provider.ThumbnailInfo.prototype.get,
@@ -348,5 +366,7 @@
 		mw.mmv.provider.Image.prototype.get = oldImageGet;
 		mw.mmv.provider.ImageInfo.prototype.get = oldImageInfoGet;
 		mw.mmv.provider.ThumbnailInfo.prototype.get = oldThumbnailInfoGet;
+
+		cleanNewViewer();
 	} );
 }( mediaWiki, jQuery ) );

tests/qunit/mmv/ui/mmv.ui.buttons.test.js

@@ -0,0 +1,40 @@
+/*
+ * This file is part of the MediaWiki extension MediaViewer.
+ *
+ * MediaViewer 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.
+ *
+ * MediaViewer 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 MediaViewer.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+( function( mw, $ ) {
+	QUnit.module( 'mmv.ui.Buttons', QUnit.newMwEnvironment() );
+
+	QUnit.test( 'Prev/Next', 2, function( assert ) {
+		var $qf = $( '#qunit-fixture' ),
+			buttons = new mw.mmv.ui.Buttons( $qf, $( '<div>' ), $( '<div>' ) ),
+			viewer = mw.mmv.mediaViewer,
+			oldLoadIndex = viewer.loadIndex,
+			oldLightbox = viewer.lightbox;
+
+		viewer.lightbox = {};
+
+		viewer.loadIndex = function () {
+			assert.ok( true, 'Switched to next/prev image' );
+		};
+
+		buttons.$next.click();
+		buttons.$prev.click();
+
+		viewer.loadIndex = oldLoadIndex;
+		viewer.lightbox = oldLightbox;
+	} );
+}( mediaWiki, jQuery ) );

tests/qunit/mmv/ui/mmv.ui.canvas.test.js

@@ -16,7 +16,7 @@
  */
 
 ( function( mw, $ ) {
-	QUnit.module( 'mw.mmv.ui.Canvas', QUnit.newMwEnvironment() );
+	QUnit.module( 'mmv.ui.Canvas', QUnit.newMwEnvironment() );
 
 	QUnit.test( 'Constructor sanity check', 3, function( assert ) {
 		var $qf = $( '#qunit-fixture' ),