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-rw-r--r--lib/kernel/test/os_SUITE.erl18
1 files changed, 16 insertions, 2 deletions
diff --git a/lib/kernel/test/os_SUITE.erl b/lib/kernel/test/os_SUITE.erl
index 8056321448..591fbb2125 100644
--- a/lib/kernel/test/os_SUITE.erl
+++ b/lib/kernel/test/os_SUITE.erl
@@ -26,7 +26,8 @@
null_in_command/1, space_in_name/1, bad_command/1,
find_executable/1, unix_comment_in_command/1, deep_list_command/1,
large_output_command/1, background_command/0, background_command/1,
- message_leak/1, close_stdin/0, close_stdin/1, perf_counter_api/1]).
+ message_leak/1, close_stdin/0, close_stdin/1, max_size_command/1,
+ perf_counter_api/1]).
-include_lib("common_test/include/ct.hrl").
@@ -39,7 +40,7 @@ all() ->
space_in_name, bad_command,
find_executable, unix_comment_in_command, deep_list_command,
large_output_command, background_command, message_leak,
- close_stdin, perf_counter_api].
+ close_stdin, max_size_command, perf_counter_api].
groups() ->
[].
@@ -322,6 +323,19 @@ close_stdin(Config) ->
"-1" = os:cmd(Fds).
+max_size_command(_Config) ->
+
+ Res20 = os:cmd("cat /dev/zero", #{ max_size => 20 }),
+ 20 = length(Res20),
+
+ Res0 = os:cmd("cat /dev/zero", #{ max_size => 0 }),
+ 0 = length(Res0),
+
+ Res32768 = os:cmd("cat /dev/zero", #{ max_size => 32768 }),
+ 32768 = length(Res32768),
+
+ ResHello = string:trim(os:cmd("echo hello", #{ max_size => 20 })),
+ 5 = length(ResHello).
%% Test that the os:perf_counter api works as expected
perf_counter_api(_Config) ->