update unit tests for default channels

api/command_test.go

@@ -129,7 +129,7 @@ func TestJoinCommands(t *testing.T) {
 
 	c1 := Client.Must(Client.GetChannels("")).Data.(*model.ChannelList)
 
-	if len(c1.Channels) != 3 { // 3 because of town-square and direct
+	if len(c1.Channels) != 4 { // 4 because of town-square, off-topic and direct
 		t.Fatal("didn't join channel")
 	}