This patch validates that creation of an already existing element
bails out with EEXIST.

Signed-off-by: Pablo Neira Ayuso <pa...@netfilter.org>
---
 tests/shell/testcases/sets/0007create_element_0 | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100755 tests/shell/testcases/sets/0007create_element_0

diff --git a/tests/shell/testcases/sets/0007create_element_0 
b/tests/shell/testcases/sets/0007create_element_0
new file mode 100755
index 0000000..47b3559
--- /dev/null
+++ b/tests/shell/testcases/sets/0007create_element_0
@@ -0,0 +1,15 @@
+#!/bin/bash
+
+# This testcase checks for add and create element commands.
+
+set -e
+$NFT add table t
+$NFT add set t s { type ipv4_addr \; }
+$NFT add element t s { 1.1.1.1 }
+if $NFT create element t s { 1.1.1.1 } 2>/dev/null ; then
+       echo "E: accepted element creation that already exists" >&2
+       exit 1
+fi
+$NFT add element t s { 1.1.1.1 }
+
+exit 0
-- 
2.1.4

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