Bug Fix 11282: config.getini returns an empty list for an option of type string absent in INI file

testing/test_conftest.py

@@ -222,40 +222,30 @@ def test_setinitial_conftest_subdirs(pytester: Pytester, name: str) -> None:
 
 
 def test_my_option(pytester: Pytester):
-    testdir = pytester.mkdir("test_my_option")
-    conftest_content = """\
-    import pytest
+    pytester.makeconftest(
+        """\
+        import pytest
+        def pytest_addoption(parser):
+            parser.addini(
+                "my_option",
+                type="string",
+                default=None,
+                help="My option",
+            )
 
-    def pytest_addoption(parser):
-        parser.addini(
-            "my_option",
-            type="string",
-            default=None,
-            help="My option",
-        )
-
-    @pytest.fixture(scope='session')
-    def my_option(request):
-        return request.config.getini("my_option")
-
-    """
-    # Place conftest.py in the root directory of the project
-    testdir.parent.joinpath("conftest.py").write_text(
-        conftest_content, encoding="utf-8"
+        @pytest.fixture(scope='session')
+        def my_option(request):
+            return request.config.getini("my_option")
+        """
     )
-
-    # Create a simple test function
-    test_content = """\
-
-    def test_example(my_option):
-        assert my_option is None
-
-    """
-    testdir.joinpath("test_my_option.py").write_text(test_content, encoding="utf-8")
-    result = pytester.runpytest(
-        str(testdir.parent)
-    )  # Run pytest from the root directory
-    assert result.ret == 0
+    pytester.makepyfile(
+        """\
+        def test_x(my_option):
+            assert my_option is None
+        """
+    )
+    res = pytester.runpytest()
+    assert res.ret == 0
 
 
 def test_conftest_confcutdir(pytester: Pytester) -> None: