add coverage config

pyproject.toml

@@ -119,6 +119,20 @@ known_first_party = [
 addopts = "-raXs --durations 10 --color=yes --doctest-modules"
 asyncio_mode = "auto"
 
+[tool.coverage.report]
+exclude_lines = [
+  "pragma: no cover",
+  "def __repr__",
+  "if self.debug:",
+  "if settings.DEBUG",
+  "raise AssertionError",
+  "raise NotImplementedError",
+  "if 0:",
+  "if __name__ == .__main__.:",
+  "class .*\bProtocol\\):",
+"@(abc\\.)?abstractmethod",
+]
+
 [tool.mypy]
 python_version = 3.9
 check_untyped_defs = true