Add tests for filtering left groups from search

// FREEBIE

js/views/conversation_search_view.js

@@ -53,7 +53,7 @@
             'click .new-contact': 'createConversation',
         },
 
-        filterContacts: function(e) {
+        filterContacts: function() {
             var query = this.$input.val().trim();
             if (query.length) {
                 if (this.maybeNumber(query)) {

test/views/conversation_search_view_test.js

@@ -20,5 +20,47 @@ describe('ConversationSearchView', function() {
       assert.ok(view.maybeNumber(n), n);
     });
   });
+  describe('Searching for left groups', function() {
+      var convo = new Whisper.ConversationCollection().add({
+          id: 'a-left-group',
+          name: 'i left this group',
+          members: [],
+          type: 'group',
+          left: true
+      });
+      before(function(done) {
+          convo.save().then(done);
+      });
+      describe('with no messages', function() {
+          var input = $('<input>');
+          var view = new Whisper.ConversationSearchView({ input: input }).render();
+          before(function(done) {
+              view.$input.val('left');
+              view.filterContacts();
+              view.typeahead_view.collection.on('reset', function() {
+                  done();
+              });
+          });
+          it('should not surface left groups with no messages', function() {
+              assert.isUndefined(view.typeahead_view.collection.get(convo.id), 'got left group');
+          });
+      });
+      describe('with messages', function() {
+          var input = $('<input>');
+          var view = new Whisper.ConversationSearchView({ input: input }).render();
+          before(function(done) {
+              convo.save({lastMessage: 'asdf'}).then(function() {
+                view.$input.val('left');
+                view.filterContacts();
+                view.typeahead_view.collection.on('reset', function() {
+                    done();
+                });
+              });
+          });
+          it('should surface left groups with messages', function() {
+              assert.isDefined(view.typeahead_view.collection.get(convo.id), 'got left group');
+          });
+      });
+  });
 
 });