Expand fbcode buck test coverage for arm backend (58→162 test targets)

[digantdesai]

Summary:
Expand the arm backend test coverage in fbcode by adding all available
test files from ops/, quantizer/, and misc/ directories to targets.bzl.

Reviewed By: 3l1

Differential Revision: D96521268

[pytorch-bot]

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❌ 1 New Failure, 2 Unrelated Failures

As of commit 68a6157 with merge base 36e8ed9 ():

NEW FAILURE - The following job has failed:

• pull / unittest / macos / macos-job (gh)
  export/tests/test_target_recipes.py::TestTargetRecipes::test_mv3_model

BROKEN TRUNK - The following jobs failed but were present on the merge base:

👉 Rebase onto the `viable/strict` branch to avoid these failures

• pull / unittest / windows / windows-job (gh) (trunk failure)
  ##[error]The operation was canceled.
• pull / unittest-editable / windows / windows-job (gh) (trunk failure)
  ##[error]The operation was canceled.

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[meta-codesync]

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[Copilot]

Pull request overview

Expands the Arm backend’s Buck-based pytest coverage in fbcode by enumerating many more existing test files, and aligns Conv3D lowering with the common tosa_serializer import style used throughout the Arm backend.

Changes:

• Greatly expands backends/arm/test/targets.bzl to include many more ops/, quantizer/, and misc/ pytest targets (with some explicitly disabled and annotated).
• Updates Conv3D TOSA lowering to import tosa_serializer directly.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
backends/arm/test/targets.bzl	Adds many more pytest targets for Arm backend tests and documents known exclusions.
backends/arm/operators/op_tosa_conv3d.py	Switches Conv3D visitor to import tosa_serializer directly.

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[Copilot]

The PR description/title claims this adds “all available” tests from ops/, quantizer/, and misc/, but this target list still omits many existing tests in those directories (e.g., ops/test_acos.py, ops/test_any.py, misc/test_high_rank_permute_view_invariants.py, etc.). Either update the description to reflect that this is a curated subset, or switch to native.glob(["ops/test_.py"], ...) / native.glob(["misc/test_.py"], ...) with an explicit exclusion list so coverage doesn’t silently drift as new tests are added.

[Copilot]

This exclusion reason appears incorrect: executorch.backends.test.harness.stages is included in the public Buck target //executorch/backends/test/harness:tester (which is already a dependency of //executorch/backends/arm/test:arm_tester_lib). If quantizer/test_preserve_kwargs.py is being skipped for another reason (e.g., failures), please update the comment; otherwise it looks like it should be enabled to increase coverage.

Suggested change

	# "quantizer/test_preserve_kwargs.py", # needs executorch.backends.test.harness.stages (no BUCK target)
	"quantizer/test_preserve_kwargs.py",

[Copilot]

Same as above for this exclusion: executorch.backends.test.harness.stages has a Buck target (//executorch/backends/test/harness:tester) and is already pulled in transitively via //executorch/backends/arm/test:arm_tester. If this test is disabled due to failures/flake, please update the comment accordingly; otherwise consider enabling it to match the stated goal of expanding coverage.