[reltool] Add more test cases and fix bugs

OTP-9794

The following test cases are added for the inteface from GUI to
reltool_server:
    * get_config
    * get_apps
    * set_app_and_undo
    * set_apps_and_undo
    * load_config_and_undo
    * reset_config_and_undo
    * save_config

The following bugs were found and corrected:
    * If set_apps failed, then the state of reltool_server would not
      be reset to how it was before the failing operation - and every
      operation done afterwards would also (seem to) fail.
    * undo_config did not work after reset_config - since faulty #sys
      record was stored as old_sys.
    * undo_config did not work after set_app (used when changing the
      content of an application from the GUI) - since old_sys was not
      set. Also old_status was not set causing possible warnings to
      disappear.
    * undo_config did not work after set_apps (used e.g. when
      excluding or including an application from the GUI) - since
      old_sys was not set. Also old_status was not set causing
      possible warnings to disappear.

3 files changed, 87 insertions, 0 deletions

diff --git a/lib/reltool/test/reltool_server_SUITE_data/faulty_app_file/a-1.0/ebin/a.app b/lib/reltool/test/reltool_server_SUITE_data/faulty_app_file/a-1.0/ebin/a.app
new file mode 100644
index 0000000000..ea77103598
--- /dev/null
+++ b/lib/reltool/test/reltool_server_SUITE_data/faulty_app_file/a-1.0/ebin/a.app
@@ -0,0 +1 @@
+faulty app file
diff --git a/lib/reltool/test/reltool_server_SUITE_data/faulty_app_file/a-1.0/src/a.erl b/lib/reltool/test/reltool_server_SUITE_data/faulty_app_file/a-1.0/src/a.erl
new file mode 100644
index 0000000000..bb500bed69
--- /dev/null
+++ b/lib/reltool/test/reltool_server_SUITE_data/faulty_app_file/a-1.0/src/a.erl
@@ -0,0 +1,49 @@
+%% ``The contents of this file are subject to the Erlang Public License,
+%% Version 1.1, (the "License"); you may not use this file except in
+%% compliance with the License. You should have received a copy of the
+%% Erlang Public License along with this software. If not, it can be
+%% retrieved via the world wide web at http://www.erlang.org/.
+%%
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and limitations
+%% under the License.
+%%
+%% The Initial Developer of the Original Code is Ericsson Utvecklings AB.
+%% Portions created by Ericsson are Copyright 1999, Ericsson Utvecklings
+%% AB. All Rights Reserved.''
+%%
+%%     $Id$
+%%
+-module(a).
+
+
+-behaviour(gen_server).
+
+-vsn(1).
+
+%% External exports
+-export([start_link/0, a/0]).
+%% Internal exports
+-export([init/1, handle_call/3, handle_info/2, terminate/2]).
+
+start_link() -> gen_server:start_link({local, aa}, a, [], []).
+
+a() -> gen_server:call(aa, a).
+
+%%-----------------------------------------------------------------
+%% Callback functions from gen_server
+%%-----------------------------------------------------------------
+init([]) ->
+    process_flag(trap_exit, true),
+    {ok, state}.
+
+handle_call(a, _From, State) ->
+    X = application:get_all_env(a),
+    {reply, X, State}.
+
+handle_info(_, State) ->
+    {noreply, State}.
+
+terminate(_Reason, _State) ->
+    ok.
diff --git a/lib/reltool/test/reltool_server_SUITE_data/faulty_app_file/a-1.0/src/a_sup.erl b/lib/reltool/test/reltool_server_SUITE_data/faulty_app_file/a-1.0/src/a_sup.erl
new file mode 100644
index 0000000000..a141c1767b
--- /dev/null
+++ b/lib/reltool/test/reltool_server_SUITE_data/faulty_app_file/a-1.0/src/a_sup.erl
@@ -0,0 +1,37 @@
+%% ``The contents of this file are subject to the Erlang Public License,
+%% Version 1.1, (the "License"); you may not use this file except in
+%% compliance with the License. You should have received a copy of the
+%% Erlang Public License along with this software. If not, it can be
+%% retrieved via the world wide web at http://www.erlang.org/.
+%%
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and limitations
+%% under the License.
+%%
+%% The Initial Developer of the Original Code is Ericsson Utvecklings AB.
+%% Portions created by Ericsson are Copyright 1999, Ericsson Utvecklings
+%% AB. All Rights Reserved.''
+%%
+%%     $Id$
+%%
+-module(a_sup).
+
+
+-behaviour(supervisor).
+
+%% External exports
+-export([start/2]).
+
+%% Internal exports
+-export([init/1]).
+
+start(_, _) ->
+    supervisor:start_link({local, a_sup}, a_sup, []).
+
+init([]) ->
+    SupFlags = {one_for_one, 4, 3600},
+    Config = {a,
+	      {a, start_link, []},
+	      permanent, 2000, worker, [a]},
+    {ok, {SupFlags, [Config]}}.