Tests: Use pytest-cov, and configure in pyproject.toml

Author: amotl

.coveragerc

@@ -74,10 +74,7 @@ jobs:
           poe lint
 
           # Run tests.
-          uv run coverage run -m pytest
-          
-          # Set the stage for uploading the coverage report.
-          uv run coverage xml
+          poe test
 
       # https://github.com/codecov/codecov-action
       - name: Upload coverage results to Codecov

.github/workflows/tests.yml

@@ -41,17 +41,40 @@ dependencies = [
 [dependency-groups]
 dev = [
     "certifi>=2025.10.5",
-    "coverage>=7.11.0",
     "mypy>=1.18.2",
     "poethepoet<1",
     "pytest>=8.4.2",
+    "pytest-cov<8",
     "pytz>=2025.2",
     "ruff>=0.14.2",
     "setuptools>=80.9.0",
     "stopit>=1.1.2",
 ]
 
 
+[tool.coverage.run]
+branch = false
+omit = [
+  "tests/*",
+]
+source = [ "src" ]
+
+[tool.coverage.report]
+fail_under = 0
+show_missing = true
+exclude_lines = [
+    "# pragma: no cover",
+    "raise NotImplemented",
+]
+omit = [
+    "*/.buildout/eggs/*",
+    "buildout-cache/eggs/*",
+    "eggs/*",
+    "parts/*",
+    "src/crate/client/_pep440.py",
+]
+
+
 [tool.mypy]
 mypy_path = "src"
 packages = [
@@ -69,7 +92,7 @@ non_interactive = true
 
 
 [tool.pytest.ini_options]
-addopts = "-rA --verbosity=3"
+addopts = "-rA --verbosity=3 --cov --cov-report=term-missing --cov-report=xml"
 minversion = "2.0"
 log_level = "DEBUG"
 log_cli_level = "DEBUG"