Add example tests

.gitignore

 dist/*
 *.egg-info
 *.pyc
+
+.coverage

tests/requirements.txt

@@ -2,3 +2,5 @@ black
 build
 flake8
 pylint
+pytest
+pytest-cov

tests/test_cool_module.py

+"""Testing of the Cool Module"""
+from unittest import TestCase
+
+from map.cool_module import greeter
+
+
+class TestCoolModule(TestCase):
+    """Test Case of the Cool Module"""
+
+    def test_greeter(self):
+        """Testing that the greeter does not crash"""
+        greeter()
+        self.assertEqual(2 + 2, 4)

tox.ini

@@ -16,6 +16,7 @@ deps =
     -r{toxinidir}/tests/requirements.txt
 commands =
     {envpython} --version
+    {envpython} -m pytest --cov=map
 
 # Use generative name and command prefixes to reuse the same virtualenv
 # for all linting jobs.
@@ -28,7 +29,7 @@ commands =
     black: {envpython} -m black --version
     black: {envpython} -m black --check --diff .
     pylint: {envpython} -m pylint --version
-    pylint: {envpython} -m pylint map
+    pylint: {envpython} -m pylint map tests
 
 [testenv:build]
 usedevelop = False