From 4676eb881c2619250b384e8e1ab60bc8ae5d58c3 Mon Sep 17 00:00:00 2001
From: Anders Svensson <anders@erlang.org>
Date: Sat, 23 May 2015 16:16:51 +0200
Subject: Fix incorrect suite usage of OTP 18 monotonic time

Value was used as strictly increasing when it's only non-decreasing,
causing testcases to fail.
---
 lib/diameter/test/diameter_util.erl           | 15 ++++++++-------
 lib/diameter/test/diameter_watchdog_SUITE.erl |  3 +--
 2 files changed, 9 insertions(+), 9 deletions(-)

(limited to 'lib/diameter')

diff --git a/lib/diameter/test/diameter_util.erl b/lib/diameter/test/diameter_util.erl
index c496876ee1..df7d268429 100644
--- a/lib/diameter/test/diameter_util.erl
+++ b/lib/diameter/test/diameter_util.erl
@@ -204,13 +204,14 @@ seed() ->
 %% unique_string/0
 
 unique_string() ->
-    us(diameter_lib:now()).
-
-us({M,S,U}) ->
-    tl(lists:append(["-" ++ integer_to_list(N) || N <- [M,S,U]]));
-
-us(MonoT) ->
-    integer_to_list(MonoT).
+    try erlang:unique_integer() of
+        N ->
+            integer_to_list(N)
+    catch
+        error: undef ->  %% OTP < 18
+            {M,S,U} = timestamp(),
+            tl(lists:append(["-" ++ integer_to_list(N) || N <- [M,S,U]]))
+    end.
 
 %% ---------------------------------------------------------------------------
 %% have_sctp/0
diff --git a/lib/diameter/test/diameter_watchdog_SUITE.erl b/lib/diameter/test/diameter_watchdog_SUITE.erl
index 5a3ff2c92f..f39e12686e 100644
--- a/lib/diameter/test/diameter_watchdog_SUITE.erl
+++ b/lib/diameter/test/diameter_watchdog_SUITE.erl
@@ -673,8 +673,7 @@ jitter(T,D) ->
 
 %% Generate a unique hostname for the faked peer.
 hostname() ->
-    {M,S,U} = diameter_util:timestamp(),
-    lists:flatten(io_lib:format("~p-~p-~p", [M,S,U])).
+    ?util:unique_string().
 
 putr(Key, Val) ->
     put({?MODULE, Key}, Val).
-- 
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