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-rw-r--r--lib/stdlib/test/gen_server_SUITE.erl48
1 files changed, 47 insertions, 1 deletions
diff --git a/lib/stdlib/test/gen_server_SUITE.erl b/lib/stdlib/test/gen_server_SUITE.erl
index dffeadb423..3b6a3f38bc 100644
--- a/lib/stdlib/test/gen_server_SUITE.erl
+++ b/lib/stdlib/test/gen_server_SUITE.erl
@@ -32,7 +32,7 @@
spec_init_local_registered_parent/1,
spec_init_global_registered_parent/1,
otp_5854/1, hibernate/1, otp_7669/1, call_format_status/1,
- error_format_status/1, call_with_huge_message_queue/1
+ error_format_status/1, get_state/1, replace_state/1, call_with_huge_message_queue/1
]).
% spawn export
@@ -57,6 +57,7 @@ all() ->
spec_init_local_registered_parent,
spec_init_global_registered_parent, otp_5854, hibernate,
otp_7669, call_format_status, error_format_status,
+ get_state, replace_state,
call_with_huge_message_queue].
groups() ->
@@ -1033,6 +1034,51 @@ error_format_status(Config) when is_list(Config) ->
process_flag(trap_exit, OldFl),
ok.
+%% Verify that sys:get_state correctly returns gen_server state
+%%
+get_state(suite) ->
+ [];
+get_state(doc) ->
+ ["Test that sys:get_state/1,2 return the gen_server state"];
+get_state(Config) when is_list(Config) ->
+ State = self(),
+ {ok, _Pid} = gen_server:start_link({local, get_state},
+ ?MODULE, {state,State}, []),
+ State = sys:get_state(get_state),
+ State = sys:get_state(get_state, 5000),
+ {ok, Pid} = gen_server:start_link(?MODULE, {state,State}, []),
+ State = sys:get_state(Pid),
+ State = sys:get_state(Pid, 5000),
+ ok.
+
+%% Verify that sys:replace_state correctly replaces gen_server state
+%%
+replace_state(suite) ->
+ [];
+replace_state(doc) ->
+ ["Test that sys:replace_state/1,2 replace the gen_server state"];
+replace_state(Config) when is_list(Config) ->
+ State = self(),
+ {ok, _Pid} = gen_server:start_link({local, replace_state},
+ ?MODULE, {state,State}, []),
+ State = sys:get_state(replace_state),
+ NState1 = "replaced",
+ Replace1 = fun(_) -> NState1 end,
+ NState1 = sys:replace_state(replace_state, Replace1),
+ NState1 = sys:get_state(replace_state),
+ {ok, Pid} = gen_server:start_link(?MODULE, {state,NState1}, []),
+ NState1 = sys:get_state(Pid),
+ Suffix = " again",
+ NState2 = NState1 ++ Suffix,
+ Replace2 = fun(S) -> S ++ Suffix end,
+ NState2 = sys:replace_state(Pid, Replace2, 5000),
+ NState2 = sys:get_state(Pid, 5000),
+ %% verify no change in state if replace function crashes
+ Replace3 = fun(_) -> throw(fail) end,
+ NState2 = sys:replace_state(Pid, Replace3),
+ NState2 = sys:get_state(Pid, 5000),
+ ok.
+
%% Test that the time for a huge message queue is not
%% significantly slower than with an empty message queue.
call_with_huge_message_queue(Config) when is_list(Config) ->