CNA-VGAP-044: CnaTests' Wine test route does not prove which Direct3D implementation served a run
Evidence basis: source-verified at the pinned commit; tests exist (not executed for this page). Claims on this page were checked by reading the CNA source at commit c1c316b9; unless a sentence says otherwise, nothing here was built or executed. Nothing on this page was executed unless the Evidence section says so.
CnaTests' Wine emulator skips the DXVK engagement gate for discovery and for every discovered case, including GoogleTest cases that create a device, so a passing cross-built run does not show which Direct3D implementation rendered it.
- Identifier
CNA-VGAP-044- Category
- Verification gap
- Subsystem
- Testing & evidence
- Status
- Open
- Verified against
- CNA
c1c316b9(c1c316b9c7a846ce8002809c151fcd1af14942c9) - Evidence basis
- Source-verified: read at TARGET, not executed
- Tests touching this area
- Yes: see Current tests
- Affected contract
- CnaTests CTest routes for DIRECTX9 and DIRECTX11 in MinGW cross trees
Expected behaviour
A test counted as Direct3D evidence under Wine shows which translation layer rendered it, as the per-renderer engagement gates do for their own examples.
Actual behaviour at TARGET
UnitTests.cmake gives CnaTests a CROSSCOMPILING_EMULATOR that sets CNA_D3D9_SKIP_DXVK_GATE=1 or CNA_D3D11_SKIP_DXVK_GATE=1; the property applies to discovery and to every discovered case, including GoogleTest cases that create a device. Nothing records which Direct3D implementation (DXVK or Wine's own) served such a case.
Source locations
cmake/UnitTests.cmake— set_target_properties(CnaTests PROPERTIES CROSSCOMPILING_EMULATOR ...) with the gate-skip variables
Evidence
Checked by reading at c1c316b9; not executed.
Related: CNA-GAP-059 (the emulator exists only for certain default renderers). The in-code comments justify each skip (pure unit tests create no device); the gap is that the evidence cannot distinguish the implementation that ran.
Focused reproduction
No focused reproduction is known. Nothing has been invented here; the evidence above is what exists.
Current tests
Renderer example CTests keep their engagement gates; CnaTests cases do not.
Regression test
Keep the gate for CnaTests cases that create a device (or split the device-free cases into their own executable).
Blast radius
How much Direct3D evidence obtained under Wine can be trusted; native Windows runs are unaffected.
Workaround
No workaround is known.
Related pages
The same subject is explained at several altitudes. These are the neighbouring pages at each one.