From 46fd8b195b55af459c51253bcf5313ae71a40b71 Mon Sep 17 00:00:00 2001 From: Peter Andersson Date: Tue, 28 Apr 2015 13:53:47 +0200 Subject: Introduce wait_for_prompt option OTP-12688 --- lib/common_test/src/ct_telnet.erl | 93 +++++++++++++++++----- .../ct_telnet_own_server_SUITE.erl | 18 +++++ lib/common_test/test/telnet_server.erl | 6 ++ 3 files changed, 99 insertions(+), 18 deletions(-) diff --git a/lib/common_test/src/ct_telnet.erl b/lib/common_test/src/ct_telnet.erl index d906a267a1..844f53731e 100644 --- a/lib/common_test/src/ct_telnet.erl +++ b/lib/common_test/src/ct_telnet.erl @@ -486,7 +486,8 @@ expect(Connection,Patterns) -> %%% Opts = [Opt] %%% Opt = {idle_timeout,IdleTimeout} | {total_timeout,TotalTimeout} | %%% repeat | {repeat,N} | sequence | {halt,HaltPatterns} | -%%% ignore_prompt | no_prompt_check +%%% ignore_prompt | no_prompt_check | wait_for_prompt | +%%% {wait_for_prompt,Prompt} %%% IdleTimeout = infinity | integer() %%% TotalTimeout = infinity | integer() %%% N = integer() @@ -499,9 +500,9 @@ expect(Connection,Patterns) -> %%% %%% @doc Get data from telnet and wait for the expected pattern. %%% -%%%

Pattern can be a POSIX regular expression. If more -%%% than one pattern is given, the function returns when the first -%%% match is found.

+%%%

Pattern can be a POSIX regular expression. The function +%%% returns as soon as a pattern has been successfully matched (at least one, +%%% in the case of multiple patterns).

%%% %%%

RxMatch is a list of matched strings. It looks %%% like this: [FullMatch, SubMatch1, SubMatch2, ...] @@ -524,10 +525,13 @@ expect(Connection,Patterns) -> %%% milliseconds, {error,timeout} is returned. The default %%% value is infinity (i.e. no time limit).

%%% -%%%

The function will always return when a prompt is found, unless -%%% any of the ignore_prompt or -%%% no_prompt_check options are used, in which case it -%%% will return when a match is found or after a timeout.

+%%%

The function will return when a prompt is received, even if no +%%% pattern has yet been matched. In this event, +%%% {error,{prompt,Prompt}} is returned. +%%% However, this behaviour may be modified with the +%%% ignore_prompt or no_prompt_check option, which +%%% tells expect to return only when a match is found or after a +%%% timeout.

%%% %%%

If the ignore_prompt option is used, %%% ct_telnet will ignore any prompt found. This option @@ -541,6 +545,13 @@ expect(Connection,Patterns) -> %%% is useful if, for instance, the Pattern itself %%% matches the prompt.

%%% +%%%

The wait_for_prompt option forces ct_telnet +%%% to wait until the prompt string has been received before returning +%%% (even if a pattern has already been matched). This is equal to calling: +%%% expect(Conn, Patterns++[{prompt,Prompt}], [sequence|Opts]). +%%% Note that idle_timeout and total_timeout +%%% may abort the operation of waiting for prompt.

+%%% %%%

The repeat option indicates that the pattern(s) %%% shall be matched multiple times. If N is given, the %%% pattern(s) will be matched N times, and the function @@ -653,18 +664,21 @@ handle_msg({cmd,Cmd,Opts},State) -> start_gen_log(heading(cmd,State#state.name)), log(State,cmd,"Cmd: ~p",[Cmd]), + %% whatever is in the buffer from previous operations + %% will be ignored as we go ahead with this telnet cmd + debug_cont_gen_log("Throwing Buffer:",[]), debug_log_lines(State#state.buffer), case {State#state.type,State#state.prompt} of - {ts,_} -> + {ts,_} -> silent_teln_expect(State#state.name, State#state.teln_pid, State#state.buffer, prompt, State#state.prx, [{idle_timeout,2000}]); - {ip,false} -> + {ip,false} -> silent_teln_expect(State#state.name, State#state.teln_pid, State#state.buffer, @@ -1029,10 +1043,12 @@ teln_expect(Name,Pid,Data,Pattern0,Prx,Opts) -> end, PromptCheck = get_prompt_check(Opts), - Seq = get_seq(Opts), - Pattern = convert_pattern(Pattern0,Seq), - {IdleTimeout,TotalTimeout} = get_timeouts(Opts), + {WaitForPrompt,Pattern1,Opts1} = wait_for_prompt(Pattern0,Opts), + + Seq = get_seq(Opts1), + Pattern2 = convert_pattern(Pattern1,Seq), + {IdleTimeout,TotalTimeout} = get_timeouts(Opts1), EO = #eo{teln_pid=Pid, prx=Prx, @@ -1042,9 +1058,16 @@ teln_expect(Name,Pid,Data,Pattern0,Prx,Opts) -> haltpatterns=HaltPatterns, prompt_check=PromptCheck}, - case get_repeat(Opts) of + case get_repeat(Opts1) of false -> - case teln_expect1(Name,Pid,Data,Pattern,[],EO) of + case teln_expect1(Name,Pid,Data,Pattern2,[],EO) of + {ok,Matched,Rest} when WaitForPrompt -> + case lists:reverse(Matched) of + [{prompt,_},Matched1] -> + {ok,Matched1,Rest}; + [{prompt,_}|Matched1] -> + {ok,lists:reverse(Matched1),Rest} + end; {ok,Matched,Rest} -> {ok,Matched,Rest}; {halt,Why,Rest} -> @@ -1054,7 +1077,7 @@ teln_expect(Name,Pid,Data,Pattern0,Prx,Opts) -> end; N -> EO1 = EO#eo{repeat=N}, - repeat_expect(Name,Pid,Data,Pattern,[],EO1) + repeat_expect(Name,Pid,Data,Pattern2,[],EO1) end. convert_pattern(Pattern,Seq) @@ -1118,6 +1141,40 @@ get_ignore_prompt(Opts) -> get_prompt_check(Opts) -> not lists:member(no_prompt_check,Opts). +wait_for_prompt(Pattern, Opts) -> + case lists:member(wait_for_prompt, Opts) of + true -> + wait_for_prompt1(prompt, Pattern, + lists:delete(wait_for_prompt,Opts)); + false -> + case proplists:get_value(wait_for_prompt, Opts) of + undefined -> + {false,Pattern,Opts}; + PromptStr -> + wait_for_prompt1({prompt,PromptStr}, Pattern, + proplists:delete(wait_for_prompt,Opts)) + end + end. + +wait_for_prompt1(Prompt, [Ch|_] = Pattern, Opts) when is_integer(Ch) -> + wait_for_prompt2(Prompt, [Pattern], Opts); +wait_for_prompt1(Prompt, Pattern, Opts) when is_list(Pattern) -> + wait_for_prompt2(Prompt, Pattern, Opts); +wait_for_prompt1(Prompt, Pattern, Opts) -> + wait_for_prompt2(Prompt, [Pattern], Opts). + +wait_for_prompt2(Prompt, Pattern, Opts) -> + Pattern1 = case lists:reverse(Pattern) of + [prompt|_] -> Pattern; + [{prompt,_}|_] -> Pattern; + _ -> Pattern ++ [Prompt] + end, + Opts1 = case lists:member(sequence, Opts) of + true -> Opts; + false -> [sequence|Opts] + end, + {true,Pattern1,Opts1}. + %% Repeat either single or sequence. All match results are accumulated %% and returned when a halt condition is fulllfilled. repeat_expect(_Name,_Pid,Rest,_Pattern,Acc,#eo{repeat=0}) -> @@ -1210,7 +1267,7 @@ get_data1(Pid) -> %% 1) Single expect. %% First the whole data chunk is searched for a prompt (to avoid doing %% a regexp match for the prompt at each line). -%% If we are searching for anyting else, the datachunk is split into +%% If we are searching for anything else, the datachunk is split into %% lines and each line is matched against each pattern. %% one_expect: split data chunk at prompts @@ -1227,7 +1284,7 @@ one_expect(Name,Pid,Data,Pattern,EO) -> log(name_or_pid(Name,Pid),"PROMPT: ~ts",[PromptType]), {match,{prompt,PromptType},Rest}; [{prompt,_OtherPromptType}] -> - %% Only searching for one specific prompt, not thisone + %% Only searching for one specific prompt, not this one log_lines(Name,Pid,UptoPrompt), {nomatch,Rest}; _ -> diff --git a/lib/common_test/test/ct_telnet_SUITE_data/ct_telnet_own_server_SUITE.erl b/lib/common_test/test/ct_telnet_SUITE_data/ct_telnet_own_server_SUITE.erl index 1d3f5918d2..9dc9095f47 100644 --- a/lib/common_test/test/ct_telnet_SUITE_data/ct_telnet_own_server_SUITE.erl +++ b/lib/common_test/test/ct_telnet_SUITE_data/ct_telnet_own_server_SUITE.erl @@ -40,6 +40,7 @@ all() -> expect, expect_repeat, expect_sequence, + expect_wait_until_prompt, expect_error_prompt, expect_error_timeout1, expect_error_timeout2, @@ -81,6 +82,8 @@ end_per_group(_GroupName, Config) -> expect(_) -> {ok, Handle} = ct_telnet:open(telnet_server_conn1), ok = ct_telnet:send(Handle, "echo ayt"), + {ok,["ayt"]} = ct_telnet:expect(Handle, "ayt"), + ok = ct_telnet:send(Handle, "echo ayt"), {ok,["ayt"]} = ct_telnet:expect(Handle, ["ayt"]), ok = ct_telnet:close(Handle), ok. @@ -103,6 +106,21 @@ expect_sequence(_) -> ok = ct_telnet:close(Handle), ok. +%% Check that expect can wait for delayed prompt +expect_wait_until_prompt(_) -> + {ok, Handle} = ct_telnet:open(telnet_server_conn1), + Timeouts = [{idle_timeout,5000},{total_timeout,7000}], + + ok = ct_telnet:send(Handle, "echo_delayed_prompt 3000 xxx"), + {ok,["xxx"]} = + ct_telnet:expect(Handle, "xxx", + [wait_for_prompt|Timeouts]), + ok = ct_telnet:send(Handle, "echo_delayed_prompt 3000 yyy zzz"), + {ok,[["yyy"],["zzz"]]} = + ct_telnet:expect(Handle, ["yyy","zzz"], + [{wait_for_prompt,"> "}|Timeouts]), + ok. + %% Check that expect returns when a prompt is found, even if pattern %% is not matched. expect_error_prompt(_) -> diff --git a/lib/common_test/test/telnet_server.erl b/lib/common_test/test/telnet_server.erl index 11959c3e12..2db5a9bc44 100644 --- a/lib/common_test/test/telnet_server.erl +++ b/lib/common_test/test/telnet_server.erl @@ -242,6 +242,12 @@ do_handle_data("echo_loop " ++ Data,State) -> ReturnData = string:join(Lines,"\n"), send_loop(list_to_integer(TStr),ReturnData,State), {ok,State}; +do_handle_data("echo_delayed_prompt "++Data,State) -> + [MsStr|EchoData] = string:tokens(Data, " "), + send(string:join(EchoData,"\n"),State), + ct:sleep(list_to_integer(MsStr)), + send("\r\n> ",State), + {ok,State}; do_handle_data("disconnect_after " ++WaitStr,State) -> Wait = list_to_integer(string:strip(WaitStr,right,$\n)), dbg("Server will close connection in ~w ms...", [Wait]), -- cgit v1.2.3