titan-iac/testing/tests/test_quality_coverage_helpers.py

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"""Focused coverage-helper tests for titan-iac quality modules."""
from __future__ import annotations
import textwrap
from pathlib import Path
from testing.quality_coverage import compute_workspace_line_coverage, run_check
def test_compute_workspace_line_coverage_handles_missing_xml(tmp_path: Path) -> None:
"""Missing coverage XML should produce a zero workspace coverage score."""
contract = {"coverage": {"tracked_files": ["managed.py"]}}
assert compute_workspace_line_coverage(contract, tmp_path, tmp_path / "missing.xml") == 0.0
def test_compute_workspace_line_coverage_averages_present_tracked_files(tmp_path: Path) -> None:
"""Workspace coverage should average only tracked files that appear in the report."""
coverage_xml = tmp_path / "coverage.xml"
coverage_xml.write_text(
textwrap.dedent(
"""\
<coverage>
<packages>
<package>
<classes>
<class filename="alpha.py" line-rate="1.0" />
<class filename="beta.py" line-rate="0.5" />
</classes>
</package>
</packages>
</coverage>
"""
),
encoding="utf-8",
)
contract = {"coverage": {"tracked_files": ["alpha.py", "beta.py", "missing.py"]}}
assert compute_workspace_line_coverage(contract, tmp_path, coverage_xml) == 75.0
def test_run_check_keeps_relative_names_when_source_roots_do_not_match(tmp_path: Path) -> None:
"""Relative filenames should remain relative when no declared source root contains them."""
coverage_xml = tmp_path / "coverage.xml"
unmatched_root = tmp_path / "other-root"
unmatched_root.mkdir()
coverage_xml.write_text(
textwrap.dedent(
f"""\
<coverage>
<sources>
<source>{unmatched_root}</source>
</sources>
<packages>
<package>
<classes>
<class filename="relative.py" line-rate="0.80" />
</classes>
</package>
</packages>
</coverage>
"""
),
encoding="utf-8",
)
issues = run_check(
{"coverage": {"minimum_percent": 95.0, "tracked_files": ["relative.py"]}},
tmp_path,
coverage_xml,
)
assert issues == ["coverage below 95.0%: relative.py (80.0%)"]