Verification Note: bf-6d973-child-3 - Process Cleanup in TH-05-SSRF Tests

Summary

Verified that all SSRF URL tests properly clean up MCP server processes to prevent orphans. All acceptance criteria PASS.

Verification Steps

1. McpServerGuard Implementation Review

Location: /home/coding/pdftract/crates/pdftract-cli/tests/TH-05-ssrf-block.rs

Implementation (lines 31-81):

✅ RAII guard struct (lines 31-33): McpServerGuard owns the Child process
✅ Drop implementation includes all required components:
- Stdin closure (line 56): let _ = child.stdin.take(); signals EOF for graceful shutdown
- Bounded wait (lines 58-71): 200ms timeout with 10ms polling intervals
- Force kill if graceful shutdown fails (line 75): child.kill() followed by try_wait()

2. Test Usage Verification

All 7 SSRF tests in TH-05-ssrf-block.rs use the McpServerGuard:

✅ test_ipv4_loopback_blocked() (line 198)
✅ test_ipv4_wildcard_blocked() (line 237)
✅ test_cloud_metadata_blocked() (line 274)
✅ test_rfc1918_private_blocked() (line 311)
✅ test_ipv6_loopback_blocked() (line 348)
✅ test_http_scheme_rejected() (line 525)
✅ test_no_network_connection_attempted() (line 566)

Each test calls spawn_mcp_server() which returns McpServerGuard, ensuring automatic cleanup on drop.

3. Test Execution Results

Command: cargo test --test TH-05-ssrf-block --features default,decrypt

Result: ✅ All 7 tests passed in 0.43s

running 7 tests
test test_cloud_metadata_blocked ... ok
test test_http_scheme_rejected ... ok
test test_ipv4_loopback_blocked ... ok
test test_ipv4_wildcard_blocked ... ok
test test_ipv6_loopback_blocked ... ok
test test_no_network_connection_attempted ... ok
test test_rfc1918_private_blocked ... ok

test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out

4. Orphaned Process Check

Before tests: No pdftract mcp processes running After tests: No pdftract mcp processes running

Verification commands:

# Before tests
pgrep -af 'pdftract mcp' | head -20
# Output: Only shell wrapper code, no actual pdftract mcp processes

# After tests
ps aux | grep -i 'pdftract.*mcp' | grep -v grep
# Output: "No pdftract mcp processes found"

5. Core Test File Review

Location: /home/coding/pdftract/crates/pdftract-core/tests/TH-05-ssrf-block.rs

This file contains unit tests for URL validation logic (no process spawning) and integration tests that manually manage process cleanup with ProcessGuard (lines 1746-1778). The integration tests explicitly close stdin and call wait_with_timeout() for deterministic cleanup.

Acceptance Criteria Status

Criterion	Status	Notes
All SSRF URL tests use McpServerGuard	✅ PASS	All 7 tests use `spawn_mcp_server()`
Drop implementation includes bounded wait	✅ PASS	200ms timeout with 10ms polling
Drop implementation includes force kill	✅ PASS	`child.kill()` if graceful shutdown fails
pgrep shows zero orphaned processes	✅ PASS	Verified before and after test run
Verification note created	✅ PASS	This file

Conclusion

The TH-05-SSRF block tests correctly implement process cleanup using the RAII pattern. The McpServerGuard ensures deterministic cleanup even if tests panic, and no orphaned processes remain after test completion. The bounded wait (200ms) prevents hanging while allowing graceful shutdown, and force kill as a fallback ensures processes are always cleaned up.

Date: 2026-07-06 Verified by: Claude Code (glm-4.7) Tests Run: 7/7 passed Orphaned Processes: 0

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