Replace coverage with pytest-cov plugin for code coverage

pytest-cov is a coverage plugin for pytest and provides
extra capability on top of coverage run.

Signed-off-by: Martin Hickey <[email protected]>

Author: hickeyma

.gitignore

@@ -1,13 +1,17 @@
-*.egg-info
-*.pyc
+# Distribution / packaging
+build/
+dist/
+*.egg-info/
+
+# Unit test / coverage reports
 __pycache__
+htmlcov/
+.tox/
 .coverage
 .coverage.*
 durations/*
 coverage*.xml
-dist
-htmlcov
-test
+qcfg.json
 
 # IDEs
 .vscode/
@@ -23,23 +27,9 @@ venv/
 # Mac personalization files
 *.DS_Store
 
-# Tox envs
-.tox
-
-# Backup files and folders
-*.bkp
-*.bkp.*
-*bkp*
-
-# Build output
-/build/lib/
-
 # Generated by setuptools_scm
 /fms_mo/_version.py
 
-# Generated by tests
-qcfg.json
-
 # Generated by spelling check
 dictionary.dic
 

tox.ini

@@ -3,22 +3,28 @@ envlist = ruff, lint, spellcheck, unit
 minversion = 4.4
 
 [testenv]
-description = run tests (unit)
+description = run tests (unit, unitcov)
 extras =
     dev
 package = wheel
 wheel_build_env = pkg
 deps =
     pytest
+    pytest-cov
+    pytest-html
 commands =
-    unit: {basepython} -m pytest {posargs:tests}
+    unit: {envpython} -m pytest {posargs:tests}
+    unitcov: {envpython} -W error::UserWarning -m pytest --cov=fms_mo --cov-report term --cov-report=html:coverage-{env_name} --cov-report=xml:coverage-{env_name}.xml --html=durations/{env_name}.html {posargs:tests -m "not (examples or slow)"}
 
 [testenv:py3]
 basepython = python3.11
 
 [testenv:unit]
 basepython = {[testenv:py3]basepython}
 
+[testenv:unitcov]
+basepython = {[testenv:py3]basepython}
+
 [testenv:lint]
 description = lint with pylint
 basepython = {[testenv:py3]basepython}
@@ -68,23 +74,8 @@ commands =
     {envpython} -m pyspelling --config {toxinidir}/.spellcheck.yml --spellchecker aspell
 allowlist_externals = sh
 
-[testenv:coverage]
-description = report unit test coverage
-deps =
-    coverage
-    pytest
-    genbadge[coverage]
-commands =
-    coverage run \
-        --omit=*/_version.py \
-        --source=fms_mo \
-        --module pytest tests/
-    coverage report -m
-    coverage xml
-    genbadge coverage -s -i coverage.xml
-
 [gh]
 python =
-    3.11 = 3.11
-    3.10 = 3.10
-    3.9 = 3.9
+    3.11 = 3.11-{unitcov}
+    3.10 = 3.10-{unitcov}
+    3.9 = 3.9-{unitcov}