Fix items-count updating in right-hand pane

And some other tweaks to ZoteroPane.itemSelected()

chrome/content/zotero/zoteroPane.js

@@ -1226,10 +1226,14 @@ var ZoteroPane = new function()
 	
 	
 	/**
-	 * @return {Promise}
+	 * @return {Promise<Boolean>} - Promise that resolves to true if an item was selected,
+	 *                              or false if not (used for tests, though there could possibly
+	 *                              be a better test for whether the item pane changed)
 	 */
 	this.itemSelected = function (event) {
 		return Zotero.spawn(function* () {
+			yield Zotero.DB.waitForTransaction();
+			
 			var selectedItems = this.itemsView.getSelectedItems();
 			
 			// Check if selection has actually changed. The onselect event that calls this
@@ -1237,13 +1241,11 @@ var ZoteroPane = new function()
 			// such as whenever selectEventsSuppressed is set to false.
 			var ids = selectedItems.map(item => item.id);
 			ids.sort();
-			if (Zotero.Utilities.arrayEquals(_lastSelectedItems, ids)) {
+			if (ids.length && Zotero.Utilities.arrayEquals(_lastSelectedItems, ids)) {
 				return false;
 			}
 			_lastSelectedItems = ids;
 			
-			yield Zotero.DB.waitForTransaction();
-			
 			if (!this.itemsView) {
 				Zotero.debug("Items view not available in itemSelected", 2);
 				return false;
@@ -1405,6 +1407,8 @@ var ZoteroPane = new function()
 					}
 					
 					this.setItemPaneMessage(msg);
+					
+					return false;
 				}
 			}
 			
@@ -1424,7 +1428,7 @@ var ZoteroPane = new function()
 			}
 			throw e;
 		}.bind(this));
-	};
+	}
 	
 	
 	/**

test/content/support.js

@@ -48,16 +48,7 @@ var loadZoteroPane = Zotero.Promise.coroutine(function* () {
 	// there or it should be good enough here.
 	yield Zotero.Promise.delay(52);
 	
-	var zp = win.ZoteroPane;
-	var cv = zp.collectionsView;
-	var resolve1, resolve2;
-	var promise1 = new Zotero.Promise(() => resolve1 = arguments[0]);
-	var promise2 = new Zotero.Promise(() => resolve2 = arguments[0]);
-	cv.addEventListener('load', () => resolve1())
-	yield promise1;
-	cv.selection.select(0);
-	zp.addEventListener('itemsLoaded', () => resolve2());
-	yield promise2;
+	yield waitForItemsLoad(win, 0);
 	
 	return win;
 });
@@ -85,6 +76,22 @@ function waitForWindow(uri) {
 	return deferred.promise;
 }
 
+var waitForItemsLoad = function (win, collectionRowToSelect) {
+	var resolve;
+	var promise = new Zotero.Promise(() => resolve = arguments[0]);
+	var zp = win.ZoteroPane;
+	var cv = zp.collectionsView;
+	cv.addEventListener('load', function () {
+		if (collectionRowToSelect !== undefined) {
+			cv.selection.select(collectionRowToSelect);
+		}
+		zp.addEventListener('itemsLoaded', function () {
+			resolve();
+		});
+	});
+	return promise;
+}
+
 /**
  * Waits for a single item event. Returns a promise for the item ID(s).
  */

test/tests/zoteroPaneTest.js

@@ -34,4 +34,50 @@ describe("ZoteroPane", function() {
 			assert.equal(item.getField('title'), value);
 		})
 	});
+	
+	describe("#itemSelected()", function () {
+		it("should update the item count", function* () {
+			var collection = new Zotero.Collection;
+			collection.name = "Count Test";
+			var id = yield collection.save();
+			yield waitForItemsLoad(win);
+			
+			// Unselected, with no items in view
+			assert.equal(
+				doc.getElementById('zotero-item-pane-message').value,
+				Zotero.getString('pane.item.unselected.zero', 0)
+			);
+			
+			// Unselected, with one item in view
+			var item = new Zotero.Item('newspaperArticle');
+			item.setCollections([id]);
+			var itemID1 = yield item.save({
+				skipSelect: true
+			});
+			assert.equal(
+				doc.getElementById('zotero-item-pane-message').value,
+				Zotero.getString('pane.item.unselected.singular', 1)
+			);
+			
+			// Unselected, with multiple items in view
+			var item = new Zotero.Item('audioRecording');
+			item.setCollections([id]);
+			var itemID2 = yield item.save({
+				skipSelect: true
+			});
+			assert.equal(
+				doc.getElementById('zotero-item-pane-message').value,
+				Zotero.getString('pane.item.unselected.plural', 2)
+			);
+			
+			// Multiple items selected
+			var promise = zp.itemsView._getItemSelectedPromise();
+			zp.itemsView.rememberSelection([itemID1, itemID2]);
+			yield promise;
+			assert.equal(
+				doc.getElementById('zotero-item-pane-message').value,
+				Zotero.getString('pane.item.selected.multiple', 2)
+			);
+		})
+	})
 })