Add function to retrieve list of assigned keys

skv.go

@@ -141,6 +141,27 @@ func (kvs *KVStore) Delete(key string) error {
 	})
 }
 
+// Iterate over all existing keys and return a slice of the keys.
+// If no keys are found, return an empty slice.
+//
+//	store.GetKeys()
+func (kvs *KVStore) GetKeys() ([]string, error) {
+	var kl []string
+
+	err := kvs.db.View(func(tx *bolt.Tx) error {
+		var err error
+		b := tx.Bucket(bucketName)
+
+		err = b.ForEach(func(k, v []byte) error {
+			//copy(kopie, k)
+			kl = append(kl, string(k))
+			return err
+		})
+		return err
+	})
+	return kl, err
+}
+
 // Close closes the key-value store file.
 func (kvs *KVStore) Close() error {
 	return kvs.db.Close()

skv_test.go

@@ -131,6 +131,26 @@ func testGetPut(t *testing.T, inval interface{}, outval interface{}) {
 	}
 }
 
+func TestGetKeys(t *testing.T) {
+	os.Remove("skv-test.db")
+	db, err := Open("skv-test.db")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if l, err := db.GetKeys(); err != nil || len(l) != 0 {
+		t.Fatal("GetKey slice should be empty")
+	}
+	if err := db.Put("test.key", "TESTVALUE"); err != nil {
+		t.Fatal(err)
+	}
+	if l, err := db.GetKeys(); err != nil || len(l) != 1 {
+		t.Fatal("GetKey slice should contain one key")
+	}
+	if err := db.Close(); err != nil {
+		t.Fatal(err)
+	}
+}
+
 func TestNil(t *testing.T) {
 	os.Remove("skv-test.db")
 	db, err := Open("skv-test.db")