mutter

brl/mutter

History

Neil Roberts f9456574ef Add test to verify replacing a layer doesn't leak the pipeline parent The current recommendation for pipelines is that once they have been used for painting then they should be considered immutable. If you want to modify a pipeline you should instead make a copy and unref the original pipeline. Internally we try to check whether the modified copy replaces all of the properties of the parent and prune a redundant ancestor hierarchy. Pruning the hierarchy is particularly important if the pipelines contain textures because otherwise the textures may be leaked when the parent pipeline keeps a reference to it. This test verifies that usage pattern by creating a chain of pipeline copies each with their own replacement texture. Some user data is then set on the textures with a callback so that we can verify that once the original pipelines are destroyed then the textures are also destroyed. The test is currently failing because Cogl doesn't correctly prune ancestory for layer state authority. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit 3fbec92acb90008492eb125025f92b42d6e07930)		2013-03-19 17:53:43 +00:00
..
conform	Add test to verify replacing a layer doesn't leak the pipeline parent	2013-03-19 17:53:43 +00:00
data	Starts porting Cogl conformance tests from Clutter	2011-09-08 15:48:07 +01:00
micro-perf	avoid redundant idle if using FRAME_SYNC to throttle	2013-02-15 17:44:49 +00:00
Makefile.am	Fixes for make dist	2012-08-06 14:27:40 +01:00
README	Starts porting Cogl conformance tests from Clutter	2011-09-08 15:48:07 +01:00

README

Outline of test categories:

The conform/ tests:
-------------------
These tests should be non-interactive unit-tests that verify a single
feature is behaving as documented. See conform/ADDING_NEW_TESTS for more
details.

Although it may seem a bit awkward; all the tests are built into a
single binary because it makes building the tests *much* faster by avoiding
lots of linking.

Each test has a wrapper script generated though so running the individual tests
should be convenient enough. Running the wrapper script will also print out for
convenience how you could run the test under gdb or valgrind like this for
example:

  NOTE: For debugging purposes, you can run this single test as follows:
  $ libtool --mode=execute \
            gdb --eval-command="b test_cogl_depth_test" \
            --args ./test-conformance -p /conform/cogl/test_cogl_depth_test
  or:
  $ env G_SLICE=always-malloc \
    libtool --mode=execute \
            valgrind ./test-conformance -p /conform/cogl/test_cogl_depth_test

By default the conformance tests are run offscreen. This makes the tests run
much faster and they also don't interfere with other work you may want to do by
constantly stealing focus. CoglOnscreen framebuffers obviously don't get tested
this way so it's important that the tests also get run onscreen every once in a
while, especially if changes are being made to CoglFramebuffer related code.
Onscreen testing can be enabled by setting COGL_TEST_ONSCREEN=1 in your
environment.

The micro-bench/ tests:
-----------------------
These should be focused performance tests, ideally testing a
single metric. Please never forget that these tests are synthetic and if you
are using them then you understand what metric is being tested. They probably
don't reflect any real world application loads and the intention is that you
use these tests once you have already determined the crux of your problem and
need focused feedback that your changes are indeed improving matters. There is
no exit status requirements for these tests, but they should give clear
feedback as to their performance. If the framerate is the feedback metric, then
the test should forcibly enable FPS debugging.

The data/ directory:
--------------------
This contains optional data (like images) that can be referenced by a test.


Misc notes:
-----------
• All tests should ideally include a detailed description in the source
explaining exactly what the test is for, how the test was designed to work,
and possibly a rationale for the approach taken for testing.

• When running tests under Valgrind, you should follow the instructions
available here:

        http://live.gnome.org/Valgrind

and also use the suppression file available inside the data/ directory.