# 0.1.x Coverage Hardening Review

Issue: #49
Branch: `feat/issue-49-coverage-0-1`
Baseline: `origin/develop`
Date: 2026-06-10

## Scope

This review covers test-only coverage hardening for the 0.1.0 and 0.1.1 foundation scope:

- `bluetape-rs-core` validation error display and `source()` contracts.
- `bluetape-rs-collections` collection error display and `source()` contracts.
- `bluetape-rs-logging` correlation-id rejection and error display contracts.
- `bluetape-rs-test` async assertion and concurrent tester error display, source, and invalid configuration branches.

## Coverage

Baseline from `develop` before this branch:

| Crate | Covered / Total | Line coverage |
| --- | ---: | ---: |
| `logging` | 84 / 107 | 78.50% |
| `test` | 345 / 440 | 78.41% |

Final local coverage from `coverage/lcov.info`:

| Crate | Covered / Total | Line coverage |
| --- | ---: | ---: |
| `async` | 463 / 534 | 86.70% |
| `collections` | 355 / 370 | 95.95% |
| `core` | 203 / 209 | 97.13% |
| `logging` | 95 / 107 | 88.79% |
| `test` | 413 / 440 | 93.86% |

Result: no crate remains below 80% line coverage. The previously low `error.rs` files are now covered by focused public error contract tests.

## 7-Tier Review Result

| Tier | Gate | Result | Evidence |
| --- | --- | --- | --- |
| 1 | Scope | PASS | Changes are limited to test coverage and review evidence for 0.1.x foundation crates. |
| 2 | Error contracts | PASS | Public `Display` and `source()` behavior is covered for validation, collection, correlation, async assertion, and concurrent assertion errors. |
| 3 | Boundary coverage | PASS | Blank/too-long/unsafe correlation IDs, invalid tester bounds, and no-source error variants are covered. |
| 4 | Async/concurrency behavior | PASS | Existing panic/join paths now assert `WorkerJoinFailed` display and source forwarding. |
| 5 | Coverage target | PASS | `logging` and `test` are both above 80%; all crates are above 80%. |
| 6 | Local validation | PASS | fmt, diff check, workspace tests, clippy, rustdoc, and llvm-cov completed successfully. |
| 7 | Subagent review | PASS | Re-review reported P0=0 P1=0 after adding the tracked review artifact and `WorkerJoinFailed` contract coverage. |

## Validation

Commands run:

- `cargo fmt --all --check`
- `git diff --check`
- `cargo test -p bluetape-rs-logging --all-features --locked`
- `cargo test -p bluetape-rs-test --all-features --locked`
- `cargo test -p bluetape-rs-core --all-features --locked`
- `cargo test -p bluetape-rs-collections --all-features --locked`
- `cargo test --workspace --all-features --locked`
- `cargo clippy --workspace --all-targets --all-features --locked -- -D warnings`
- `RUSTDOCFLAGS="-D warnings" cargo doc --workspace --no-deps --locked`
- `LLVM_COV=/opt/homebrew/Cellar/llvm/22.1.7_1/bin/llvm-cov LLVM_PROFDATA=/opt/homebrew/Cellar/llvm/22.1.7_1/bin/llvm-profdata cargo llvm-cov --workspace --all-features --locked --lcov --output-path coverage/lcov.info`

## DoD Status

| Item | Status | Evidence |
| --- | --- | --- |
| 80% crate coverage gate | PASS | No crate below 80%; `logging` 88.79%, `test` 93.86%. |
| Low `error.rs` coverage addressed | PASS | `core` and `collections` public error display/source tests added. |
| 0.1.x public error contracts | PASS | Error display/source contracts covered for core, collections, logging, and test helpers. |
| Local validation | PASS | fmt, diff check, workspace tests, clippy, rustdoc, and llvm-cov passed locally. |
| 7-Tier subagent review | PASS | Re-review reported P0=0 P1=0; remaining P3 is satisfied by including this artifact in the commit. |
