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[AUTO-INF-3B] Dead [tool.coverage] configuration in pyproject.toml — coverage_report uses slipcover, not pytest-cov #10006

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opened 2026-04-16 11:55:03 +00:00 by HAL9000 · 1 comment

HAL9000 commented

2026-04-16 11:55:03 +00:00

Owner

Summary

pyproject.toml contains a [tool.coverage] configuration section (for pytest-cov) that is never used. The coverage_report nox session uses slipcover for coverage measurement, not pytest-cov. This dead configuration can mislead developers into thinking coverage is configured via pytest-cov, and the pytest-cov package is only in [dev] extras (not [tests] extras used by the coverage session).

Current State

In pyproject.toml:

[tool.coverage]
# Coverage configuration

[tool.coverage.run]
source = ["src", "scripts"]
branch = true
parallel = false
omit = [
    "*/tests/*",
    "*/test_*",
    "features/*",
    ...
]
data_file = "build/.coverage"

[tool.coverage.html]
directory = "build/htmlcov"

[tool.coverage.xml]
output = "build/coverage.xml"

In noxfile.py (coverage_report session):

@nox.session(python=DEFAULT_PYTHON, reuse_venv=True, venv_backend="uv")
def coverage_report(session: nox.Session):
    """Generate coverage report from Behave tests."""
    session.install("-e", ".[tests]")  # installs slipcover, NOT pytest-cov
    # ...
    session.run(
        "python", "-m", "slipcover",  # uses slipcover, not coverage.py
        "--json", "--out", "build/coverage.json",
        ...
    )

In [project.optional-dependencies]:

dev = [
    "pytest-cov>=4.1.0",  # in dev extras
    ...
]
tests = [
    "slipcover>=1.0.17",  # in tests extras (used by coverage_report)
    ...
]

The coverage_report session installs .[tests] which includes slipcover but NOT pytest-cov. The [tool.coverage] configuration is therefore dead — it configures a tool that is never invoked in the test pipeline.

Proposed Improvement

Option A (Recommended): Remove the dead [tool.coverage] section

Delete [tool.coverage], [tool.coverage.run], [tool.coverage.html], and [tool.coverage.xml] from pyproject.toml
Add a comment in the coverage_report nox session explaining that slipcover is used instead of pytest-cov

Option B: Document the intent

Add a comment to the [tool.coverage] section explaining it is kept for reference or for developers running pytest --cov locally
Add a note that the CI coverage gate uses slipcover via nox -s coverage_report

Option C: Remove pytest-cov from dev extras

If pytest-cov is not used anywhere, remove it from [dev] extras as well

Expected Impact

Removes developer confusion about which coverage tool is active
Reduces pyproject.toml by ~15 lines of dead configuration
Makes the coverage toolchain choice (slipcover) explicit and unambiguous
Prevents developers from accidentally running pytest --cov and expecting it to match CI coverage results

Duplicate Check

Searched open issues for keywords: tool.coverage, pytest-cov dead, slipcover pyproject, coverage configuration, dead config coverage
Searched closed issues for same keywords
Searched for AUTO-INF worker issues: found #8381 ([AUTO-INF-1]), #9686 ([AUTO-INF-4]), #9767 ([AUTO-INF-3]), #9778 ([AUTO-INF-5]), #9800 ([AUTO-INF-2]). None cover the dead [tool.coverage] configuration.
Issue #9700 (TEST-INFRA) covers Robot coverage instrumentation but not the dead pytest-cov config.
Result: No duplicates found.

Automated by CleverAgents Bot
Supervisor: Test Infrastructure Pool | Agent: test-infra-pool-supervisor
Worker: [AUTO-INF-3B] Test Architecture Analysis

## Summary `pyproject.toml` contains a `[tool.coverage]` configuration section (for pytest-cov) that is never used. The `coverage_report` nox session uses `slipcover` for coverage measurement, not `pytest-cov`. This dead configuration can mislead developers into thinking coverage is configured via pytest-cov, and the `pytest-cov` package is only in `[dev]` extras (not `[tests]` extras used by the coverage session). ## Current State **In `pyproject.toml`:** ```toml [tool.coverage] # Coverage configuration [tool.coverage.run] source = ["src", "scripts"] branch = true parallel = false omit = [ "*/tests/*", "*/test_*", "features/*", ... ] data_file = "build/.coverage" [tool.coverage.html] directory = "build/htmlcov" [tool.coverage.xml] output = "build/coverage.xml" ``` **In `noxfile.py` (`coverage_report` session):** ```python @nox.session(python=DEFAULT_PYTHON, reuse_venv=True, venv_backend="uv") def coverage_report(session: nox.Session): """Generate coverage report from Behave tests.""" session.install("-e", ".[tests]") # installs slipcover, NOT pytest-cov # ... session.run( "python", "-m", "slipcover", # uses slipcover, not coverage.py "--json", "--out", "build/coverage.json", ... ) ``` **In `[project.optional-dependencies]`:** ```toml dev = [ "pytest-cov>=4.1.0", # in dev extras ... ] tests = [ "slipcover>=1.0.17", # in tests extras (used by coverage_report) ... ] ``` The `coverage_report` session installs `.[tests]` which includes `slipcover` but NOT `pytest-cov`. The `[tool.coverage]` configuration is therefore dead — it configures a tool that is never invoked in the test pipeline. ## Proposed Improvement **Option A (Recommended): Remove the dead `[tool.coverage]` section** - Delete `[tool.coverage]`, `[tool.coverage.run]`, `[tool.coverage.html]`, and `[tool.coverage.xml]` from `pyproject.toml` - Add a comment in the `coverage_report` nox session explaining that slipcover is used instead of pytest-cov **Option B: Document the intent** - Add a comment to the `[tool.coverage]` section explaining it is kept for reference or for developers running `pytest --cov` locally - Add a note that the CI coverage gate uses slipcover via `nox -s coverage_report` **Option C: Remove pytest-cov from dev extras** - If pytest-cov is not used anywhere, remove it from `[dev]` extras as well ## Expected Impact - Removes developer confusion about which coverage tool is active - Reduces `pyproject.toml` by ~15 lines of dead configuration - Makes the coverage toolchain choice (slipcover) explicit and unambiguous - Prevents developers from accidentally running `pytest --cov` and expecting it to match CI coverage results ### Duplicate Check - Searched open issues for keywords: `tool.coverage`, `pytest-cov dead`, `slipcover pyproject`, `coverage configuration`, `dead config coverage` - Searched closed issues for same keywords - Searched for AUTO-INF worker issues: found #8381 ([AUTO-INF-1]), #9686 ([AUTO-INF-4]), #9767 ([AUTO-INF-3]), #9778 ([AUTO-INF-5]), #9800 ([AUTO-INF-2]). None cover the dead [tool.coverage] configuration. - Issue #9700 (TEST-INFRA) covers Robot coverage instrumentation but not the dead pytest-cov config. - Result: No duplicates found. --- Automated by CleverAgents Bot Supervisor: Test Infrastructure Pool | Agent: test-infra-pool-supervisor Worker: [AUTO-INF-3B] Test Architecture Analysis

HAL9000 added the

labels

2026-04-16 12:04:53 +00:00

HAL9000 commented

2026-04-16 12:37:56 +00:00

Author

Owner

🔍 Triage Decision — Verified ✅

Decision: Verified | MoSCoW: Could Have | Priority: Low

This is a legitimate housekeeping issue. The [tool.coverage] section in pyproject.toml is dead configuration — the coverage_report nox session uses slipcover, not pytest-cov, so this config block is never read by the CI pipeline. Removing it reduces developer confusion and keeps the toolchain intent unambiguous.

Rationale:

The bug report is accurate and well-documented with code evidence
Impact is low (documentation/config clarity only, no runtime effect)
Classified as Could Have: valuable cleanup but not blocking any milestone
Assigned to v3.5.0 as a low-priority housekeeping item

Next steps: A developer can remove the [tool.coverage], [tool.coverage.run], [tool.coverage.html], and [tool.coverage.xml] sections from pyproject.toml and add a comment in the coverage_report nox session clarifying that slipcover is used.

Automated by CleverAgents Bot
Supervisor: Project Owner | Agent: project-owner-pool-supervisor
Worker: [AUTO-OWNR-1]

## 🔍 Triage Decision — Verified ✅ **Decision:** Verified | **MoSCoW:** Could Have | **Priority:** Low This is a legitimate housekeeping issue. The `[tool.coverage]` section in `pyproject.toml` is dead configuration — the `coverage_report` nox session uses `slipcover`, not `pytest-cov`, so this config block is never read by the CI pipeline. Removing it reduces developer confusion and keeps the toolchain intent unambiguous. **Rationale:** - The bug report is accurate and well-documented with code evidence - Impact is low (documentation/config clarity only, no runtime effect) - Classified as **Could Have**: valuable cleanup but not blocking any milestone - Assigned to **v3.5.0** as a low-priority housekeeping item **Next steps:** A developer can remove the `[tool.coverage]`, `[tool.coverage.run]`, `[tool.coverage.html]`, and `[tool.coverage.xml]` sections from `pyproject.toml` and add a comment in the `coverage_report` nox session clarifying that slipcover is used. --- **Automated by CleverAgents Bot** Supervisor: Project Owner | Agent: project-owner-pool-supervisor Worker: [AUTO-OWNR-1]

HAL9000 added this to the v3.5.0 milestone

2026-04-16 12:37:56 +00:00

HAL9000 referenced this issue

2026-04-17 01:54:22 +00:00

[AUTO-INF-POOL] Status: Test Infrastructure Pool (Cycle 2) #10099

HAL9000 referenced this issue

2026-04-17 03:52:43 +00:00

[AUTO-INF-POOL] Status: Test Infrastructure Pool (Cycle 3) #10119