Add coverage support for unittests

Author: zeroSteiner

pyproject.toml

@@ -65,6 +65,13 @@ ignore_errors = true
 module = ["graphviz", "invoke.*"]
 ignore_missing_imports = true
 
+[tool.coverage.run]
+source = ["lib/rule_engine"]
+omit = ["lib/rule_engine/_vendor/*"]
+
+[tool.coverage.report]
+show_missing = true
+
 [tool.setuptools]
 package-dir = {"" = "lib"}
 

tasks.py

@@ -23,10 +23,14 @@ def docs(c):
     c.run('uv run sphinx-build -b html -a -E -v docs/source docs/html')
 
 
-@task
-def tests(c):
+@task(help={'coverage': 'Measure test coverage and print a report.'})
+def tests(c, coverage=False):
     """Run unit tests."""
-    c.run('uv run python -m unittest -v', pty=True)
+    if coverage:
+        c.run('uv run coverage run -m unittest -v', pty=True)
+        c.run('uv run coverage report')
+    else:
+        c.run('uv run python -m unittest -v', pty=True)
 
 @task
 def typechecks(c):