From 12532c96cb168ef3f03b913955572d4870dfbc9f Mon Sep 17 00:00:00 2001
From: Alex Sharov <AskAlexSharov@gmail.com>
Date: Wed, 8 Mar 2023 16:11:10 +0700
Subject: [PATCH] FirstDup support (#99)

---
 mdbx/cursor.go      |  2 +-
 mdbx/cursor_test.go | 17 +++++++++++++++--
 2 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/mdbx/cursor.go b/mdbx/cursor.go
index 02dcb7e..d3f4181 100644
--- a/mdbx/cursor.go
+++ b/mdbx/cursor.go
@@ -168,7 +168,7 @@ func (c *Cursor) Get(setkey, setval []byte, op uint) (key, val []byte, err error
 	if op == Set {
 		key = setkey
 	} else {
-		if op != LastDup {
+		if op != LastDup && op != FirstDup {
 			key = castToBytes(c.txn.key)
 		}
 	}
diff --git a/mdbx/cursor_test.go b/mdbx/cursor_test.go
index efeb240..41adf6e 100644
--- a/mdbx/cursor_test.go
+++ b/mdbx/cursor_test.go
@@ -316,16 +316,29 @@ func TestLastDup(t *testing.T) {
 				return err
 			}
 			i++
+
 			_, v, err := c.Get(nil, nil, LastDup)
 			if err != nil {
 				return err
 			}
 			if i == 1 && string(v) != "value1.3" {
-				t.Fail()
+				panic(1)
 			}
 			if i == 2 && string(v) != "value3.3" {
-				t.Fail()
+				panic(1)
+			}
+
+			_, v, err = c.Get(nil, nil, FirstDup)
+			if err != nil {
+				return err
+			}
+			if i == 1 && string(v) != "value1.1" {
+				panic(1)
 			}
+			if i == 2 && string(v) != "value3.1" {
+				panic(1)
+			}
+
 		}
 
 		return nil