wehub-resource-sync
76 lines
2.9 KiB
Python
76 lines
2.9 KiB
Python
"""Symmetry guard: every MCP tool module must have test coverage.
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Enforces the CLAUDE.md rule that "Every new feature needs tests". A tool module
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(any file under ``services/tools/`` that exposes an ``@mcp_for_unity_tool``) is
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considered covered when a ``test_*.py`` file under ``Server/tests/`` references it
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by module name -- a dedicated ``test_<module>.py`` or a characterization test
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counts. Non-``test_*.py`` scripts (e.g. ``tests/e2e/bridge_smoke.py``) are not
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scanned, so a tool exercised only there still needs a unit/characterization test.
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Tools that are genuinely untested today live in ``KNOWN_UNTESTED`` so this guard
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fails for *new* untested tools without forcing a full backfill first. SHRINK the
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quarantine list as coverage lands -- a stale entry (a module that now *has*
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coverage) also fails the guard, so the list can only get smaller, never grow
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silently.
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"""
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import re
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from pathlib import Path
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import pytest
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TOOLS_DIR = Path(__file__).resolve().parents[1] / "src" / "services" / "tools"
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TESTS_DIR = Path(__file__).resolve().parent
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# Modules under tools/ that are infrastructure, not user-facing tool surfaces.
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NOT_TOOLS = {"__init__", "utils", "preflight", "debug_request_context"}
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# Tool modules without any test reference today. Do NOT add to this list for new
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# tools -- new tools must ship with a test. Remove an entry once coverage lands.
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KNOWN_UNTESTED = {
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"execute_menu_item",
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"manage_shader",
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"manage_tools",
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}
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def _tool_modules() -> list[str]:
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mods = []
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for path in sorted(TOOLS_DIR.glob("*.py")):
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if path.stem in NOT_TOOLS:
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continue
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if "@mcp_for_unity_tool" in path.read_text(encoding="utf-8"):
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mods.append(path.stem)
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return mods
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def _is_referenced(stem: str) -> bool:
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pattern = re.compile(rf"\b{re.escape(stem)}\b")
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for test_file in TESTS_DIR.rglob("test_*.py"):
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if test_file.resolve() == Path(__file__).resolve():
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continue
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if pattern.search(test_file.read_text(encoding="utf-8")):
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return True
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return False
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@pytest.mark.parametrize("module", _tool_modules())
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def test_every_tool_module_has_test_coverage(module):
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if module in KNOWN_UNTESTED:
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pytest.skip(f"{module} is quarantined in KNOWN_UNTESTED; add a test and remove it")
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assert _is_referenced(module), (
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f"Tool module '{module}' has no test referencing it. Every tool needs a "
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f"test (CLAUDE.md). Add a Server/tests/test_{module}.py, or -- only if you "
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f"have a justified reason -- add '{module}' to KNOWN_UNTESTED."
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)
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@pytest.mark.parametrize("module", sorted(KNOWN_UNTESTED))
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def test_quarantine_list_has_no_stale_entries(module):
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assert module in set(_tool_modules()), (
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f"KNOWN_UNTESTED entry '{module}' is not a real tool module -- remove it."
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)
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assert not _is_referenced(module), (
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f"'{module}' now has test coverage -- remove it from KNOWN_UNTESTED so the "
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f"quarantine list stays honest."
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)
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