adding test coverage reports

.coveragerc

@@ -0,0 +1,26 @@
+# .coveragerc to control coverage.py
+[run]
+branch = True
+
+[report]
+# Regexes for lines to exclude from consideration
+exclude_lines =
+    # Have to re-enable the standard pragma
+    pragma: no cover
+
+    # Don't complain about missing debug-only code:
+    def __repr__
+    if self\.debug
+
+    # Don't complain if tests don't hit defensive assertion code:
+    raise AssertionError
+    raise NotImplementedError
+
+    # Don't complain if non-runnable code isn't run:
+    if 0:
+    if __name__ == .__main__.:
+
+    # Don't complain about abstract methods, they aren't run:
+    @(abc\.)?abstractmethod
+
+ignore_errors = True

groove/auth.py

@@ -2,6 +2,9 @@ import logging
 import os
 
 
-def is_authenticated(username, password):
+def is_authenticated(username: str, password: str) -> bool:
+    """
+    Returns True if the supplied username/password matches the environment.
+    """
     logging.debug(f"Authentication attempt for {username}, {password}")
     return (username == os.environ.get('USERNAME') and password == os.environ.get('PASSWORD'))

pyproject.toml

@@ -21,6 +21,7 @@ pytest-asyncio = "^0.20.2"
 pytest-dotenv = "^0.5.2"
 boddle = "^0.2.9"
 atheris = "^2.1.1"
+pytest-cov = "^4.0.0"
 
 [build-system]
 requires = ["poetry-core>=1.0.0"]

pytest.ini

@@ -2,5 +2,4 @@
 env_override_existing_values = 1
 env_files = .test_env
 log_cli_level = DEBUG
-
-
+addopts = --cov=groove/ --cov-report=term