Tests: src.ctf.lttng-live: add discarded packets inactivity test

[babeltrace.git] / tests / plugins / src.ctf.lttng-live / test_live

diff --git a/tests/plugins/src.ctf.lttng-live/test_live b/tests/plugins/src.ctf.lttng-live/test_live
index 9b44ec211b71a09e55eeefa33e54b7454c8f37ee..bbda1d3620bb137b29cb0650af429231e098ab7b 100755 (executable)
--- a/tests/plugins/src.ctf.lttng-live/test_live
+++ b/tests/plugins/src.ctf.lttng-live/test_live
@@ -327,10 +327,51 @@ test_compare_to_ctf_fs() {
        rm -f "$expected_stderr"
 }
 
-plan_tests 12
+test_inactivity_discarded_packet() {
+       # Attach and consume data from a multi-packet trace with discarded
+       # packets and emit an inactivity beacon during the discarded packets
+       # period.
+       #
+       # | pkt seq:0 |<-------discarded packets------>| pkt seq:8 |
+       # 0          20                                121       140
+       #
+       # This test was introduced to cover the following bug:
+       #
+       # When reading this type of trace locally, the CTF source is expected
+       # to introduce a "Discarded packets" message between packets 0 and 8.
+       # The timestamps of this message are [pkt0.end_ts, pkt8.begin_ts].
+       #
+       # In the context of a live source, the tracer could report an inactivity
+       # period during the interval of the "Discarded packets" message.
+       # Those messages eventually translate into a
+       # "Iterator inactivity" message with a timestamp set at the end of the
+       # inactivity period.
+       #
+       # If the tracer reports an inactivity period that ends at a point
+       # between pkt0 and pkt7 (resulting in an "Iterator inactivity" message),
+       # the live source could send a "Discarded packets" message that starts
+       # before the preceding "Iterator inactivity" message. This would break
+       # the monotonicity constraint of the graph.
+       local test_text="CLI attach and fetch from single-domains session - inactivity discarded packet"
+       local cli_args_template="-i lttng-live net://localhost:@PORT@/host/hostname/7_lost_between_2_with_index -c sink.text.details"
+       local sessions_file="$test_data_dir/inactivity_discarded_packet.json"
+       local server_args="--sessions-filename '$sessions_file'"
+       local expected_stdout="$test_data_dir/inactivity_discarded_packet.expect"
+       local expected_stderr
+
+       # Empty file for stderr expected
+       expected_stderr="$(mktemp -t test_live_inactivity_discarded_packet_stderr_expected.XXXXXX)"
+
+       run_test "$test_text" "$cli_args_template" "$server_args" "$expected_stdout" "$expected_stderr"
+
+       rm -f "$expected_stderr"
+}
+
+plan_tests 14
 
 test_list_sessions
 test_base
 test_multi_domains
 test_rate_limited
 test_compare_to_ctf_fs
+test_inactivity_discarded_packet