feat(tinykv): add Delete method

pkg/tinykv/tinykv.go

@@ -57,6 +57,7 @@ type entry[T any] struct {
 
 // KV is a registry for values (like/is a concurrent map) with timeout and sliding timeout
 type KV[T any] interface {
+	Delete(k string)
 	Get(k string) (v T, ok bool)
 	Keys() (keys []string)
 	Values() (values []T)
@@ -104,6 +105,13 @@ func (kv *store[T]) Stop() {
 	kv.stopOnce.Do(func() { close(kv.stop) })
 }
 
+// Delete deletes an entry
+func (kv *store[T]) Delete(k string) {
+	kv.mx.Lock()
+	defer kv.mx.Unlock()
+	delete(kv.kv, k)
+}
+
 func (kv *store[T]) Get(k string) (T, bool) {
 	var zero T
 	kv.mx.Lock()

pkg/tinykv/tinykv_test.go

@@ -201,6 +201,25 @@ func Test03(t *testing.T) {
 	assert.WithinDuration(putAt, putAt.Add(<-elapsed), time.Millisecond*60)
 }
 
+func Test04(t *testing.T) {
+	assert := assert.New(t)
+	kv := New(
+		time.Millisecond*10,
+		func(k string, v interface{}) {
+			t.Fatal(k, v)
+		})
+
+	err := kv.Put("1", 1, time.Millisecond*10000)
+	assert.NoError(err)
+	<-time.After(time.Millisecond * 50)
+	kv.Delete("1")
+	kv.Delete("1")
+
+	<-time.After(time.Millisecond * 100)
+	_, ok := kv.Get("1")
+	assert.False(ok)
+}
+
 func Test05(t *testing.T) {
 	assert := assert.New(t)
 	N := 10000