[KarthikMohankumar]

secret.py and k8s_model.py in the cncf.kubernetes provider were both on the OVERLOOKED_TESTS allowlist in test_project_structure.py.

Secret already had tests, but they lived in tests/unit/cncf/kubernetes/models/test_secret.py. There is no models package on the source side, so the structure check never matched them to secret.py. This PR:

• moves them to tests/unit/cncf/kubernetes/test_secret.py, next to where the source lives, and drops the now-empty models/ test package
• adds cases for constructor validation (invalid deploy_type, key without deploy_target), uppercasing of env deploy targets, __eq__/__hash__/__repr__, and a check that attach_to_pod doesn't mutate the input pod
• adds test_k8s_model.py covering append_to_pod: None and empty lists return the pod unchanged, and each object receives the previous object's result
• removes both entries from OVERLOOKED_TESTS

Tests only. No change to runtime behaviour.

related: #35442

Checks run locally:

• uv run --project providers/cncf/kubernetes pytest tests/unit/cncf/kubernetes/test_secret.py tests/unit/cncf/kubernetes/test_k8s_model.py: 19 passed
• test_project_structure.py::TestProjectStructure::test_providers_modules_should_have_tests: passed
• prek run --stage pre-commit on the changed files (ruff, ruff-format, mypy-devel-common and the other applicable hooks): passed. ast-grep was skipped locally because it could not download its Node runtime.

---

Was generative AI tooling used to co-author this PR?

• Yes — Claude Code (Opus 5.5)

Generated-by: Claude Code (Opus 5.5) following the guidelines

[boring-cyborg]

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[shahar1]

Welcome to Apache Airflow and thanks for your contribution!

[boring-cyborg]

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