Configure coverage

To be run with 'pytest --cov --cov-report=html'.

.coveragerc

@@ -0,0 +1,3 @@
+[run]
+include =
+  check_patroni/*

.gitignore

@@ -4,6 +4,7 @@ tests/config.ini
 vagrant/.vagrant
 vagrant/*.state_file
 .*.swp
+.coverage
 .venv/
 .tox/
 dist/

CONTRIBUTING.md

@@ -66,7 +66,7 @@ Running the tests,
 * manually:
 
   ```bash
-  pytest tests
+  pytest --cov tests
   ```
 
 * or using tox:

MANIFEST.in

@@ -2,6 +2,7 @@ include *.md
 include mypy.ini
 include pytest.ini
 include tox.ini
+include .coveragerc
 include .flake8
 include pyproject.toml
 recursive-include docs *.sh

requirements-dev.txt

@@ -4,6 +4,7 @@ isort
 flake8
 mypy==0.961
 pytest
+pytest-cov
 pytest-mock
 types-requests
 setuptools