Coverage: Add silly little test to appease

handler.go

@@ -105,7 +105,7 @@ func (nest *nestedHandlers) lenFor(cmd string) (total int) {
 		return 0
 	}
 	hndlrs := hs.(cmap.ConcurrentMap)
-	return len(hndlrs.Keys())
+	return hndlrs.Count()
 }
 
 func (nest *nestedHandlers) getAllHandlersFor(s string) (handlers chan handlerTuple, ok bool) {

handler_test.go

@@ -0,0 +1,30 @@
+package girc
+
+import (
+	"log"
+	"sync"
+	"testing"
+)
+
+func TestCaller_AddHandler(t *testing.T) {
+	var passChan = make(chan struct{})
+	nullClient := &Client{mu: sync.RWMutex{}}
+	c := newCaller(nullClient, log.Default())
+	c.AddBg("PRIVMSG", func(c *Client, e Event) {
+		passChan <- struct{}{}
+	})
+
+	go func() {
+		c.exec("PRIVMSG", true, nullClient, &Event{})
+	}()
+
+	if c.external.lenFor("JONES") != 0 {
+		t.Fatalf("wanted %d handlers, got %d", 0, c.internal.lenFor("JONES"))
+	}
+
+	if c.external.lenFor("PRIVMSG") != 1 {
+		t.Fatalf("wanted %d handlers, got %d", 1, c.external.lenFor("PRIVMSG"))
+	}
+
+	<-passChan
+}