CNA-VGAP-009: GraphicsDeviceManager's iOS/Android back-buffer orientation branch has no test

CNA snapshot 009d40f5  ·  Known Issues › Verification gaps  ·  source links pinned to 009d40f5

On iOS and Android GraphicsDeviceManager reshapes the preferred back buffer by DisplayOrientation and forwards SupportedOrientations to the window; the desktop test skips itself on those platforms, and the only run that reaches the branch is the iOS simulator smoke application, which asserts that a frame completes but not the back-buffer shape or the forwarded orientations.

Identifier

CNA-VGAP-009

Category

Verification gap

Subsystem

Platforms

Status

Open

Verified against

CNA 009d40f5 (009d40f5dd085c4e674d3479675fac84b12b3e0a)

Evidence basis

Source-verified: read at TARGET, not executed

Tests touching this area

Yes: see Current tests

Affected contract

GraphicsDeviceManager::PreferredBackBufferWidth/Height and SupportedOrientations on iOS and Android

Expected behaviour

The phone branch (Portrait gives width = the smaller edge; any other orientation gives the landscape shape) is pinned by a test.

Actual behaviour at TARGET

platformSupportsOrientations in GraphicsDeviceManager.cpp is true only for the platform names iOS and Android, and INTERNAL_CreateGraphicsDeviceInformation swaps the size there. DefaultBackBufferPreferencesAreTheXnaDefaults in GraphicsDeviceManagerPlatformTests.cpp calls GTEST_SKIP on those names, and no unit test fakes a phone platform. apple_smoke.cpp, which apple-ci.yml launches in the iOS simulator, sets SupportedOrientations to LandscapeLeft and runs one frame, so the iOS branch executes there, but its only assertion is the success marker; nothing runs the branch on Android.

Source locations

• modules/runtime/src/GraphicsDeviceManager.cpp — platformSupportsOrientations and INTERNAL_CreateGraphicsDeviceInformation
• modules/runtime/tests/Microsoft/Xna/Framework/GraphicsDeviceManagerPlatformTests.cpp — DefaultBackBufferPreferencesAreTheXnaDefaults skip

Evidence

Checked by reading at 009d40f5; not executed.

Independent re-verification: Checked by reading at 009d40f5; not executed. The iOS smoke application and the ios-simulator job of apple-ci.yml were read for the statement that the branch runs without an assertion on its result.

Focused reproduction

No focused reproduction is known. Nothing has been invented here; the evidence above is what exists.

Current tests

Desktop verbatim-size test; GameWindowTests.cpp covers SupportedOrientations bookkeeping on the desktop.

Regression test

A test with a platform stub reporting iOS or Android that checks the portrait and landscape shapes and the forwarded orientations.

Blast radius

Mobile back-buffer sizing and orientation.

Workaround

No workaround is known.