gstreamer/tests
Mathieu Duponchelle 25d7914395 tests: fix pipelines_parse_launch.delayed_link flakiness
Fixes #345

There were two causes for the flakiness, one much rarer than
the other.

The test sets up a source with a sometimes pad added during
the transition of a wrapper bin from READY to PAUSED.

It runs 4 iterations, the last of which makes it so the
negotiation fails.

In that case, the intention as correctly presented by the following
comment:

/* [..] ie, the pipeline should create ok but fail to change state */

However the implementation of run_delayed_test was neither calling
get_state on the pipeline (it called it on the wrapper bin), nor
checking that the return of get_state was FAILURE (it actually
checked that it was not).

This led to an obvious race condition, and was fixed by calling
get_state on the pipeline, then checking that in this specific
case (expect_link == FALSE), the state change has actually failed.

The second, rarer race condition is at set_state time. When we
don't expect the link to succeed, the return of set_state may
either be FAILURE or ASYNC, depending on timing. This was fixed
by taking expect_link into account when checking the return value
of set_state.

Co-authored by: Thibault Saunier <tsaunier@igalia.com>
2019-12-14 11:25:20 +00:00
..
benchmarks Remove autotools build system 2019-10-13 16:10:42 +01:00
check tests: fix pipelines_parse_launch.delayed_link flakiness 2019-12-14 11:25:20 +00:00
examples Remove autotools build system 2019-10-13 16:10:42 +01:00
misc Remove autotools build system 2019-10-13 16:10:42 +01:00
meson.build meson: Always use a dependency object for dependencies 2018-09-05 16:33:43 +05:30
README README: update after removal of "old" dir. 2010-07-05 12:26:42 +03:00

This directory contains regression tests, functionality tests, examples,
benchmarks, ...

benchmarks/
   benchmarks to profile pieces of GStreamer
check/
   unit tests using the check library, non-interactive
examples/
   small examples demonstrating the use of various features
misc/
   prototypes, random bits, ...