README.md

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Author : Shahbaz Youssefi
Date : 2020-06-03 14:29:07
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Message : Update and de-duplicate expectations file format comment Bug: angleproject:4675 Change-Id: Ieff7a4eae22a6d802c1fca6010cb74627d6e5777 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2227815 Reviewed-by: Yuly Novikov <ynovikov@chromium.org> Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>

src/tests/deqp_support/README.md

# dEQP Support

ANGLE integrates dEQP (i.e. the OpenGL CTS) for conformance testing.  It uses gtest to run tests,
and provides the means for dEQP to use ANGLE.

## Overriding dEQP files

Occasionally, ANGLE overrides certain dEQP files by copying them to this directory, adding the
`_override` suffix, and modifying them.  `deqp.gni` is used to select these override files to be
built with dEQP instead of the original files.

This is primarily done to fix tests until they are fixed upstream.

## Expectation files format

For every set of dEQP tests, for example GLES3 tests on the Vulkan backend, an expectations file
exists to let the test harness know which tests it should skip (as they are known to crash), or
expect to see failed.  Warnings are generated if a test unexpectedly passes, but an unexpected
failure is an error.  This let's ANGLE ensure there are no regressions.

While developing a feature, or testing on a new platform, the expectations files can be modified to
reflect the reality of the situation.  The expected format for every line in these files is:

    {BUG#} {MODIFIERS} : {TEST_NAME} = {PASS,FAIL,FLAKY,TIMEOUT,SKIP}

`MODIFIERS` can be a combination of the below list, combined with a logical AND:

    WIN XP VISTA WIN7 WIN8 WIN10
    MAC LEOPARD SNOWLEOPARD LION MOUNTAINLION MAVERICKS YOSEMITE ELCAPITAN SIERRA HIGHSIERRA MOJAVE
    LINUX CHROMEOS ANDROID
    NVIDIA AMD INTEL
    DEBUG RELEASE
    D3D9 D3D11 OPENGL GLES VULKAN
    NEXUS5X PIXEL2ORXL
    QUADROP400
    SWIFTSHADER

`TEST_NAME` can be a specific test name, or set of test names using `'*'` as wildcard anywhere in
the name.  Examples:

    // Disabled everywhere as is too slow:
    3445 : dEQP-GLES31.functional.ssbo.layout.random.all_shared_buffer.48 = SKIP

    // Crashes on both D3D11 and OPENGL:
    1442 OPENGL : dEQP-GLES31.functional.separate_shader.* = SKIP
    1442 D3D11 : dEQP-GLES31.functional.separate_shader.* = SKIP

    // Bug in older drivers:
    3726 VULKAN ANDROID : dEQP-GLES31.functional.synchronization.inter_call.without_memory_barrier.*atomic_counter* = FAIL

    // Failing test in Nvidia's OpenGL implementation on windows:
    1665 WIN NVIDIA OPENGL : dEQP-GLES31.functional.draw_indirect.negative.command_offset_not_in_buffer_unsigned32_wrap = FAIL

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