From 80757f9491c72ee262a5910e0b3b02e95b1e5f2a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bj=C3=B6rn=20Gustavsson?= <bjorn@erlang.org>
Date: Fri, 4 Dec 2015 12:15:40 +0100
Subject: Use 'rand' instead of the obsolete 'random' module

In most cases, we don't have to seed the random number generator,
as the rand:uniform/1 takes care about that itself.
---
 lib/test_server/src/test_server_ctrl.erl | 14 ++++++++++----
 lib/test_server/src/test_server_node.erl |  3 +--
 2 files changed, 11 insertions(+), 6 deletions(-)

(limited to 'lib/test_server')

diff --git a/lib/test_server/src/test_server_ctrl.erl b/lib/test_server/src/test_server_ctrl.erl
index 0be6e0b4e4..34681876f3 100644
--- a/lib/test_server/src/test_server_ctrl.erl
+++ b/lib/test_server/src/test_server_ctrl.erl
@@ -3163,11 +3163,17 @@ delete_prop([], Props) ->
 %% Shuffles the order of Cases.
 
 shuffle_cases(Ref, Cases, undefined) ->
-    shuffle_cases(Ref, Cases, ?now);
+    shuffle_cases(Ref, Cases, rand:seed_s(exsplus));
 
-shuffle_cases(Ref, [{conf,Ref,_,_}=Start | Cases], Seed) ->
+shuffle_cases(Ref, [{conf,Ref,_,_}=Start | Cases], Seed0) ->
     {N,CasesToShuffle,Rest} = cases_to_shuffle(Ref, Cases),
-    ShuffledCases = random_order(N, random:uniform_s(N, Seed), CasesToShuffle, []),
+    Seed = case Seed0 of
+	       {X,Y,Z} when is_integer(X+Y+Z) ->
+		   rand:seed(exsplus, Seed0);
+	       _ ->
+		   Seed0
+	   end,
+    ShuffledCases = random_order(N, rand:uniform_s(N, Seed), CasesToShuffle, []),
     [Start|ShuffledCases] ++ Rest.
 
 cases_to_shuffle(Ref, Cases) ->
@@ -3201,7 +3207,7 @@ random_order(1, {_Pos,Seed}, [{_Ix,CaseOrGroup}], Shuffled) ->
     Shuffled++CaseOrGroup;
 random_order(N, {Pos,NewSeed}, IxCases, Shuffled) ->
     {First,[{_Ix,CaseOrGroup}|Rest]} = lists:split(Pos-1, IxCases),
-    random_order(N-1, random:uniform_s(N-1, NewSeed),
+    random_order(N-1, rand:uniform_s(N-1, NewSeed),
 		 First++Rest, Shuffled++CaseOrGroup).
 
 
diff --git a/lib/test_server/src/test_server_node.erl b/lib/test_server/src/test_server_node.erl
index 4e6839fc6b..3419f3f5d0 100644
--- a/lib/test_server/src/test_server_node.erl
+++ b/lib/test_server/src/test_server_node.erl
@@ -619,8 +619,7 @@ do_quote_progname([Prog,Arg|Args]) ->
     end.
 
 random_element(L) ->
-    random:seed(os:timestamp()),
-    lists:nth(random:uniform(length(L)), L).
+    lists:nth(rand:uniform(length(L)), L).
 
 find_release(latest) ->
     "/usr/local/otp/releases/latest/bin/erl";
-- 
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