Change observer to fix PolymerElements#112.

iron-multi-selectable.html

@@ -46,7 +46,7 @@
     },
 
     observers: [
-      '_updateSelected(selectedValues)'
+      '_updateSelected(selectedValues.splices)'
     ],
 
     /**

test/multi.html

@@ -119,7 +119,7 @@
 
         // programatically select values 0 and 1 (both fire select)
         s.selectedValues = [0, 1];
-        
+
         // programatically select values 1 and 2 (2 fires select, 0 fires deselect)
         s.selectedValues = [1, 2];
 
@@ -135,6 +135,41 @@
         assert.equal(deselectEventCounters[2], 1);
       });
 
+      test('fire iron-select/deselect events when selectedValues is modified', function() {
+        // setup listener for iron-select/deselect events
+        var items = [s.children[0], s.children[1], s.children[2]],
+            selectEventCounters = [0, 0, 0],
+            deselectEventCounters = [0, 0, 0];
+
+        s.addEventListener('iron-select', function(e) {
+          selectEventCounters[items.indexOf(e.detail.item)]++;
+        });
+        s.addEventListener('iron-deselect', function(e) {
+          deselectEventCounters[items.indexOf(e.detail.item)]++;
+        });
+
+        s.selectedValues = []
+
+        // programatically select value 0
+        s.push('selectedValues', 0, 1);
+
+        // programatically deselect value 0
+        s.shift('selectedValues');
+
+        // programatically select value 2
+        s.push('selectedValues', 2);
+
+        // programatically deselect value 1
+        s.shift('selectedValues');
+
+        assert.equal(selectEventCounters[0], 1);
+        assert.equal(deselectEventCounters[0], 1);
+        assert.equal(selectEventCounters[1], 1);
+        assert.equal(deselectEventCounters[1], 1);
+        assert.equal(selectEventCounters[2], 1);
+        assert.equal(deselectEventCounters[2], 0);
+      });
+
       test('fire iron-select/deselect events when toggling items', function() {
         // setup listener for iron-select/deselect events
         var items = [s.children[0], s.children[1], s.children[2]],