Add build diagnostic metadata tests

[mohamedjaazeer4-sketch]

Summary

Adds focused build diagnostic metadata tests for build.py.

This PR keeps the change tests-only and validates diagnostic metadata behavior without requiring external build toolchains.

Changes

• Added tests/test_build_diagnostic_metadata.py
• Added tests/README_build_diagnostics.md
• Covered successful diagnostic report metadata
• Covered logd generation failure metadata
• Covered chunked diagnostic logd references
• Covered small logd archive split behavior
• Covered large logd archive split behavior
• Did not change production code

Testing

Ran locally:

python3 tests/test_build_diagnostic_metadata.py
python3 -m py_compile build.py tests/test_build_diagnostic_metadata.py

Focused test result:

PASS test_successful_diagnostic_report_metadata
PASS test_logd_generation_failure_report_does_not_claim_archive
PASS test_chunked_diagnostic_report_metadata
PASS test_split_diagnostic_logd_keeps_small_archive
PASS test_split_diagnostic_logd_splits_large_archive_and_removes_original
ALL BUILD DIAGNOSTIC METADATA TESTS PASSED

Notes

The tests avoid external toolchains and do not require encryptly, npm, cargo, or network access.

Checklist

• Relevant modules affected by these changes build locally
• Tests pass locally
• Diagnostic build log is committed in this PR
• Documentation has been updated, if applicable
• Configuration or schema changes are documented, if applicable
• No generated build artifacts are committed, except the required diagnostic build log
• Changes are scoped to the PR purpose and avoid unrelated cleanup
• Security, privacy, and error-handling implications have been considered

---

• I would like to request that my diagnostic build log is removed before merging

[coderabbitai]

📝 Walkthrough

Walkthrough

Adds a new self-contained test module tests/test_build_diagnostic_metadata.py exercising build.py's diagnostic report generation and logd splitting functions, along with a README documenting the test scope, coverage, and execution instructions.

Changes

Build diagnostic metadata test suite

Layer / File(s)	Summary
Test setup and fixtures tests/test_build_diagnostic_metadata.py	Adds load_build_module() to dynamically import build.py and sample_results() fixture providing per-module tuples for tests.
Diagnostic report metadata tests tests/test_build_diagnostic_metadata.py	Adds tests validating build_diagnostic_report output for successful runs, logd generation failures (nulled archive fields), and chunked reporting (list-based diagnostic_logd, chunk size fields).
split_diagnostic_logd tests tests/test_build_diagnostic_metadata.py	Adds tests verifying small archives remain unchanged and large archives split into correctly named part files with original removed and content preserved.
Test runner and docs tests/test_build_diagnostic_metadata.py, tests/README_build_diagnostics.md	Adds run_all() with __main__ guard to execute tests sequentially, plus README documenting how to run/compile-check the tests and their offline, dependency-free nature.

Estimated code review effort: 2 (Simple) | ~10 minutes

Possibly related issues

• [$30 BOUNTY] [Python] Add build diagnostic metadata tests #3: Requests the same build.py diagnostic metadata and logd split test coverage (success/failure metadata, archive splitting) implemented in this PR.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title clearly and concisely summarizes the main change: adding build diagnostic metadata tests.
Description check	✅ Passed	The description follows the template with Summary, Changes, Testing, and Checklist sections and includes commands run locally.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[coderabbitai]

🧹 Nitpick comments (2)

tests/test_build_diagnostic_metadata.py (2)

11-15: 📐 Maintainability & Code Quality | 🔵 Trivial | 💤 Low value

Consider caching the loaded module.

load_build_module() is called separately in every test, re-executing build.py's module-level code each time. Not incorrect, just slightly wasteful for a test module.

♻️ Optional refactor

+_build_module_cache = None
+
+
 def load_build_module():
-    spec = importlib.util.spec_from_file_location("build_module_under_test", BUILD_PY)
-    module = importlib.util.module_from_spec(spec)
-    spec.loader.exec_module(module)
-    return module
+    global _build_module_cache
+    if _build_module_cache is None:
+        spec = importlib.util.spec_from_file_location("build_module_under_test", BUILD_PY)
+        module = importlib.util.module_from_spec(spec)
+        spec.loader.exec_module(module)
+        _build_module_cache = module
+    return _build_module_cache

🤖 Prompt for AI Agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@tests/test_build_diagnostic_metadata.py` around lines 11 - 15, The
load_build_module helper is re-importing build.py on every test call, which
repeatedly executes its module-level code. Update load_build_module() in
test_build_diagnostic_metadata.py to cache and reuse the imported module
instance after the first spec_from_file_location/module_from_spec/exec_module
load, so subsequent tests get the same module without re-executing build.py.

---

32-32: 📐 Maintainability & Code Quality | 🔵 Trivial | 💤 Low value

Ruff S105/S106 hardcoded-password flags are false positives here.

These are literal test fixture strings ("pw-test", "pw-chunk") passed to/compared against a test function argument, not real secrets. Safe to suppress with inline # noqa if the lint gate is strict.

Also applies to: 42-42, 101-101, 114-114

🤖 Prompt for AI Agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@tests/test_build_diagnostic_metadata.py` at line 32, Ruff S105/S106 is
flagging intentional test fixture literals in the diagnostic metadata tests, so
suppress the false positives where the strings are used. Update the affected
assertions and fixture arguments in test_build_diagnostic_metadata, especially
the password and chunk-password values passed through the test helper functions,
by adding inline noqa comments at the literal uses so the lint gate treats them
as safe test data.

Source: Linters/SAST tools

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Nitpick comments:
In `@tests/test_build_diagnostic_metadata.py`:
- Around line 11-15: The load_build_module helper is re-importing build.py on
every test call, which repeatedly executes its module-level code. Update
load_build_module() in test_build_diagnostic_metadata.py to cache and reuse the
imported module instance after the first
spec_from_file_location/module_from_spec/exec_module load, so subsequent tests
get the same module without re-executing build.py.
- Line 32: Ruff S105/S106 is flagging intentional test fixture literals in the
diagnostic metadata tests, so suppress the false positives where the strings are
used. Update the affected assertions and fixture arguments in
test_build_diagnostic_metadata, especially the password and chunk-password
values passed through the test helper functions, by adding inline noqa comments
at the literal uses so the lint gate treats them as safe test data.

---

ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: bd189ef3-3d2e-44c6-9da9-d03fa374586e

📥 Commits

Reviewing files that changed from the base of the PR and between 1462fe7 and 67aa682.

📒 Files selected for processing (2)

• tests/README_build_diagnostics.md
• tests/test_build_diagnostic_metadata.py