Implement Destroy

table.go

@@ -9,6 +9,7 @@ type Table interface {
 	On(string, interface{}) error
 	Trigger(string, ...interface{}) error
 	Off(string, interface{})
+	Destroy(string) error
 }
 
 type table struct {
@@ -58,4 +59,12 @@ func (t *table) Off(name string, f interface{}) {
 	e.Off(f)
 }
 
+func (t *table) Destroy(name string) error {
+	if _, ok := t.events[name]; !ok {
+		return fmt.Errorf("%s event has not been defined yet.", name)
+	}
+	delete(t.events, name)
+	return nil
+}
+
 var _ Table = &table{}

table_test.go

@@ -50,3 +50,27 @@ func TestTableOff(t *testing.T) {
 		t.Errorf("i expected 1, but got %d", i)
 	}
 }
+
+func TestTableDestroy(t *testing.T) {
+	ta := goevent.NewTable()
+	i := 0
+	ta.On("foo", func(j int) { i += j })
+
+	ta.Trigger("foo", 1)
+	err := ta.Destroy("foo")
+	if err != nil {
+		t.Error(err)
+	}
+	err = ta.Trigger("foo", 1)
+	if err == nil {
+		t.Errorf("should destroy event. but not destroy.")
+	}
+	if i != 1 {
+		t.Errorf("i expected 1, but got %d", i)
+	}
+
+	err = ta.Destroy("foo")
+	if err == nil {
+		t.Errorf("should return error when event has not been defined yet. but got nil")
+	}
+}