Fix deprecation warnings in tests (#461)

* Fix DeprecationWarning for invalid escape sequence in test

* Fix pytest-asyncio deprecation warnings

- Add asyncio_default_fixture_loop_scope setting to pyproject.toml
- Fix [tool.pytest] to [tool.pytest.ini_options] in e2e_projects

Author: HayaoSuzuki

e2e_projects/config/pyproject.toml

@@ -36,4 +36,5 @@ pytest_add_cli_args_test_selection = [ "-m", "not fail", "-k=test_include"]
 
 [tool.pytest.ini_options]
 xfail_strict = true
-markers = [ "fail: tests that should be ignored with mutmut" ]
+markers = [ "fail: tests that should be ignored with mutmut" ]
+asyncio_default_fixture_loop_scope = "function"

e2e_projects/mutate_only_covered_lines/pyproject.toml

@@ -23,5 +23,5 @@ tests_dir = [ "tests/main/" ]
 do_not_mutate = [ "*ignore*" ]
 # do not add paths_to_mutate because we want to test src guessing
 
-[tool.pytest]
+[tool.pytest.ini_options]
 asyncio_default_fixture_loop_scope = "function"

e2e_projects/my_lib/pyproject.toml

@@ -19,5 +19,5 @@ dev = [
 [tool.mutmut]
 debug = true
 
-[tool.pytest]
+[tool.pytest.ini_options]
 asyncio_default_fixture_loop_scope = "function"

pyproject.toml

@@ -60,3 +60,4 @@ dev = [
 testpaths = [
     "tests",
 ]
+asyncio_default_fixture_loop_scope = "function"

tests/test_mutation.py

@@ -434,7 +434,7 @@ def test_bug_github_issue_77():
 
 
 def test_bug_github_issue_435():
-    source = """
+    source = r"""
     def parse(self, text: str) -> tuple[Tree[Token], str]:
         text = re.sub(r'[\w\-]  [\w\-]', dashrepl, text)