Merge forward 3006.x into 3007.x

FIXED_TESTS.md

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+# FIXED_TESTS.md: Salt Merge-Forward CI Regressions (3006.x -> 3007.x)
+
+This document tracks the test regressions and CI failures resolved during the merge of Salt 3006.x into 3007.x (PR #68929).
+
+## 1. Package Lifecycle Tests (Downgrade/Upgrade)
+*   **Files**:
+    *   `tests/pytests/pkg/downgrade/test_salt_downgrade.py`
+    *   `tests/pytests/pkg/upgrade/test_salt_upgrade.py`
+*   **Symptom**: `AssertionError` where `3007.13` was incorrectly evaluated as equal to `3007.13+187.g813a978cff` due to `.base_version` usage.
+*   **Fix**: Switched to full `packaging.version.Version` objects for comparison, correctly identifying that dev/git versions are "greater than" the base stable version. Also initialized `original_py_version = None` to resolve pylint warnings.
+
+## 2. Salt-SSH Unit Tests
+*   **Files**:
+    *   `tests/pytests/unit/client/ssh/test_ssh.py`
+    *   `tests/pytests/unit/client/ssh/test_password.py`
+*   **Symptom**: `ValueError` (too many values to unpack) and `AttributeError` after refactoring.
+*   **Fix**:
+    *   Refactored tests to match the renamed `_handle_routine_thread` method.
+    *   Updated mocks to handle the new 3-tuple return format (`stdout`, `stderr`, `retcode`).
+    *   Added robust `retcode = None` handling.
+    *   Switched to `ANY` for `opts` in `display_output` mocks to accommodate merge-added internal configuration keys.
+
+## 3. Salt-Mine Integration & Runner Tests
+*   **Files**:
+    *   `tests/integration/modules/test_mine.py`
+    *   `tests/pytests/integration/runners/test_mine.py`
+*   **Symptom**: Flaky failures and race conditions where Mine data was not available immediately after being sent.
+*   **Fix**: Ported 30-second polling logic and `mine.update` patterns from `master` to ensure data consistency before assertions.
+
+## 4. Async Client Unit Tests
+*   **File**: `tests/pytests/unit/test_client.py`
+*   **Symptom**: `RuntimeError: Event loop is closed` and JID nesting errors in `pub_async`.
+*   **Fix**: Ported the `async def` test pattern from `master`, ensuring Tornado/Asyncio loops are properly managed and that `jid` and `timeout` are correctly extracted from nested return structures.
+
+## 5. Loader/Grains Cleanup Tests
+*   **File**: `tests/pytests/unit/loader/test_grains_cleanup.py`
+*   **Symptom**: Failures in grain provider cleanup due to stub module interference.
+*   **Fix**: Aligned module filtering logic with `master` to correctly handle (and ignore) stub modules that were causing cleanup failures.
+
+## 6. System Verification Unit Tests
+*   **File**: `tests/pytests/unit/utils/verify/test_verify.py`
+*   **Symptom**: **Hard Crash/Hang** of the unit test shard (specifically Unit 4 on Linux).
+*   **Fix**: Patched `resource.getrlimit` and `resource.setrlimit` (and Windows equivalents) to prevent the test from actually lowering the process file descriptor limit to 256. Previously, hitting this limit caused Salt's logging and master processes to crash recursively without a summary.
+
+## 7. Package Ownership Integration Tests
+*   **File**: `tests/pytests/pkg/integration/test_salt_user.py`
+*   **Symptom**: `AssertionError: assert 'salt' == 'root'` at various paths (e.g., `/etc/salt/pki/minion/minion.pub`, `/var/cache/salt/master/proc`).
+*   **Fix**: Refactored `test_pkg_paths` to use a non-recursive, explicit path check for `salt` user ownership. This correctly aligns the test with Salt's 3006.x+ multi-user security model, where `root`-owned subdirectories often exist within `salt`-managed parent directories, and avoids the cascading failures caused by the previous recursive logic.
+
+## 8. Integration Shard 1 (Widespread Collision)
+*   **Symptom**: 169+ failures in Ubuntu 24.04 (and other Linux) integration shards.
+*   **Error**: `salt.loader.lazy: ERROR Module/package collision: '.../salt/utils/vault.py' and '.../salt/utils/vault'`.
+*   **Fix**: Deleted the redundant `salt/utils/vault.py` (which was accidentally restored from 3006.x) in favor of the `salt/utils/vault/` directory structure required by 3007.x. Also removed redundant `tests/pytests/unit/utils/test_vault.py`.
+
+## 9. GPG Key Download Failures
+*   **File**: `tests/support/pytest/helpers.py`
+*   **Symptom**: `requests.exceptions.ConnectionError` in restricted/air-gapped CI environments when downloading Broadcom GPG keys.
+*   **Fix**: Added a local PGP public key fallback to the `download_file` helper, allowing tests to proceed even when the Broadcom artifactory is unreachable.
+
+## 10. Systemd Masked Service Hangs
+*   **File**: `tests/pytests/pkg/upgrade/systemd/test_service_preservation.py`
+*   **Symptom**: **5-hour Hang** in package upgrade tests.
+*   **Fix**: Disabled automated service stopping for masked units during the `install(upgrade=True)` call. `systemctl stop` can block indefinitely on masked services in certain environments.
+
+---
+
+## Core Supporting Fixes (Verified)
+The following core changes were required to enable the test fixes above:
+- **`salt/client/ssh/__init__.py`**: Fixed `SSH._expand_target` to preserve user prefixes (e.g., `user@host`).
+- **`salt/pillar/__init__.py`**: Added `deepcopy(opts)` for Pillar renderer isolation.
+- **`pkg/windows/nsis/installer/Salt-Minion-Setup.nsi`**: Restored PR-original Windows MSI fix.