Add Has() to exported API (extended API)

bitcask.go

@@ -79,6 +79,11 @@ func (b *Bitcask) Get(key string) ([]byte, error) {
 	return e.Value, nil
 }
 
+func (b *Bitcask) Has(key string) bool {
+	_, ok := b.keydir.Get(key)
+	return ok
+}
+
 func (b *Bitcask) Put(key string, value []byte) error {
 	if len(key) > b.config.MaxKeySize {
 		return ErrKeyTooLarge

bitcask_test.go

@@ -40,6 +40,10 @@ func TestAll(t *testing.T) {
 		assert.Equal([]byte("bar"), val)
 	})
 
+	t.Run("Has", func(t *testing.T) {
+		assert.True(db.Has("foo"))
+	})
+
 	t.Run("Fold", func(t *testing.T) {
 		var (
 			keys   []string