tests: pytest-cov -> coverage conversion

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

Author: henryiii

pyproject.toml

@@ -54,7 +54,7 @@ test = [
   "build[uv, virtualenv]",
   "filelock >= 3",
   "pytest >= 6.2.4",
-  "pytest-cov >= 2.12",
+  "coverage[toml]>=5.1",
   "pytest-mock >= 2",
   "pytest-rerunfailures >= 9.1",
   "pytest-xdist >= 1.34",
@@ -100,6 +100,7 @@ exclude_also = [
   '^\s*raise NotImplementedError\b',
   "if typing.TYPE_CHECKING:",
 ]
+show_missing = true
 
 [tool.coverage.paths]
 build = [

tests/conftest.py

@@ -80,8 +80,8 @@ def local_pip(monkeypatch):
 
 @pytest.fixture(autouse=True)
 def avoid_constraints(monkeypatch):
-    monkeypatch.delenv("PIP_CONSTRAINT", raising=False)
-    monkeypatch.delenv("UV_CONSTRAINT", raising=False)
+    monkeypatch.delenv('PIP_CONSTRAINT', raising=False)
+    monkeypatch.delenv('UV_CONSTRAINT', raising=False)
 
 
 @pytest.fixture(autouse=True, params=[False])

tox.ini

@@ -28,9 +28,10 @@ set_env =
     PYTHONWARNDEFAULTENCODING = 1
     TEST_STATUS_DIR = {envtmpdir}
 commands =
-    pytest -ra --cov --cov-config pyproject.toml \
-      --cov-report=html:{envdir}/htmlcov --cov-context=test \
-      --cov-report=xml:{toxworkdir}/coverage.{envname}.xml {posargs:-n auto}
+    coverage run --context=test --data-file={envdir}/.coverage -m pytest -ra {posargs:-n auto}
+    coverage html --data-file={envdir}/.coverage --directory={envdir}/htmlcov
+    coverage xml --data-file={envdir}/.coverage -o {toxworkdir}/coverage.{envname}.xml
+    coverage report --data-file{envdir}/.coverage
 
 [testenv:fix]
 description = run static analysis and style checks
@@ -100,8 +101,8 @@ pass_env =
     DIFF_AGAINST
 set_env =
 commands =
-    coverage combine {toxworkdir}
-    coverage report --skip-covered --show-missing -i
+    coverage combine {envdir}/*
+    coverage report --skip-covered -i
     coverage xml -o {toxworkdir}/coverage.xml -i
     coverage html -d {toxworkdir}/htmlcov -i
     python -m diff_cover.diff_cover_tool --compare-branch {env:DIFF_AGAINST:origin/main} {toxworkdir}/coverage.xml