# Handoff Report — Test Verification and Failure Analysis

## 1. Observation
- **Command Run (Step 1)**: `.venv/bin/pytest tests/unit/tools/analysis/test_signature_tools.py -vv`
  - Output: `18 passed in 4.19s`
  - Exact file path: `tests/unit/tools/analysis/test_signature_tools.py`
  - We observed that the modified `test_signature_tools.py` file has 320 lines and includes 18 unit tests, all of which run and pass cleanly.
- **Command Run (Step 2)**: `.venv/bin/pytest tests/ -v`
  - Output: `1774 passed, 64 skipped in 79.74s`
  - This verified that all 1,700+ tests in the codebase pass.
- **Previous Failures Log**:
  - Direct quotes of the three previously failing assertions from `worker_m7_5_gen3/all_tests_output.txt`:
    1. `TestGenerateSignature::test_success`:
       ```
       FAILED tests/unit/tools/analysis/test_signature_tools.py::TestGenerateSignature::test_success - assert 'rule suspicious_test_x401000 {\n    meta:\n        description = "Auto-generated signature for test"\n        address = "0x401000"\n        length = 4\n        author = "Reversecore_MCP"\n        date = "auto-generated"\n\n    strings:\n        $code = { 48 83 ec 20 }\n\n    condition:\n        $code\n}' == '48 83 ec 20'
       ```
    2. `TestGenerateSignature::test_invalid_address`:
       ```
       FAILED tests/unit/tools/analysis/test_signature_tools.py::TestGenerateSignature::test_invalid_address - assert 'address' in "Tool 'r2' not found. Please install it."
       ```
    3. `TestGenerateYaraRule::test_smart_offset_search_failure`:
       ```
       FAILED tests/unit/tools/analysis/test_signature_tools.py::TestGenerateYaraRule::test_smart_offset_search_failure - AssertionError: assert 'Suggested alternative' in 'Address 0x401000 contains invalid bytes (all 0x00 or 0xFF). Try using a different address.'
       ```

## 2. Logic Chain
- **Inference 1 (Test Success Failure)**: The test `test_success` originally asserted `result.data == "48 83 ec 20"`. However, the product code generates a complete YARA rule envelope (wrapped in a rule structure) rather than just returning the formatted hex bytes. The current assertion in the test checks for rule presence:
  ```python
  assert result.status == "success"
  assert "suspicious_test_x401000" in result.data
  assert result.metadata["hex_bytes"] == "48 83 ec 20"
  ```
  This correctly verifies both the wrapped rule format and the metadata value.
- **Inference 2 (Invalid Address Failure)**: The test `test_invalid_address` originally triggered a call to the real `r2` environment because the address bypassed the regex filter but failed later during subprocess execution, returning a "Tool 'r2' not found" error when `r2` was not installed. The current test passes `"invalid_address!"` which contains the special character `!` so it fails input validation directly at the Python layer:
  ```python
  result = await generate_signature(str(test_file), "invalid_address!")
  assert result.status == "error"
  assert "address" in result.message
  ```
  This validates input validation behavior correctly without touching the environment/subprocesses.
- **Inference 3 (Smart Offset Search Failure)**: The test `test_smart_offset_search_failure` originally searched `result.message` for the suggested alternative. However, the helper puts the suggested alternative in the `hint` field of the ToolResult. The current assertion correctly tests `result.hint`:
  ```python
  assert result.status == "error"
  assert "Suggested alternative" in result.hint
  assert "sym.main" in result.hint
  ```
  This aligns the test verification with the actual data structure.

## 3. Caveats
- Some tests (64 in total) are marked skipped because they require specific external tools/dependencies that are not installed/present in the unit test environment (e.g. Ghidra or GDB integrations).
- The fixes in `tests/unit/tools/analysis/test_signature_tools.py` were already implemented in the workspace. No additional modifications were made during this turn, only verification and regression testing of the full test suite.

## 4. Conclusion
The unit tests in `tests/unit/tools/analysis/test_signature_tools.py` run cleanly and cover all edge cases correctly. All 1,774 tests in the codebase pass without failures. The previous failures have been fully resolved by improving the mock setups and aligning assertions with the correct return fields.

## 5. Verification Method
- **Command to run**:
  ```bash
  .venv/bin/pytest tests/unit/tools/analysis/test_signature_tools.py -vv
  .venv/bin/pytest tests/ -v
  ```
- **Files to inspect**:
  - `tests/unit/tools/analysis/test_signature_tools.py`
- **Expected result**: 18 unit tests in `test_signature_tools.py` pass cleanly, and all 1,774 tests in the project pass successfully.
