Add pytest-cov for coverage tracking

.gitignore

@@ -50,3 +50,6 @@ ENV/
 env.bak/
 venv.bak/
 .mypy_cache
+
+# Coverage
+.coverage

noxfile.py

@@ -100,8 +100,14 @@ def test(session):
     session.install("-r", "requirements-dev.txt")
     session.run("python", "-m", "eland.tests.setup_tests")
     session.install(".")
-    session.run("pytest", "--doctest-modules", *(session.posargs or ("eland/",)))
-    session.run("pytest", "--nbval", "eland/tests/tests_notebook/")
+    session.run(
+        "pytest",
+        "--cov=eland",
+        "--doctest-modules",
+        *(session.posargs or ("eland/",)),
+        "--nbval",
+        "eland/tests/tests_notebook/",
+    )
 
     session.run(
         "python",

requirements-dev.txt

@@ -9,3 +9,4 @@ scikit-learn>=0.22.1
 xgboost>=1
 nox
 lightgbm>=2.3.0
+pytest-cov