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

testing/conftest.py

@@ -147,6 +147,20 @@ def pytester(pytester: Pytester, monkeypatch: MonkeyPatch) -> Pytester:
     return pytester
 
 
+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")
+
+
 @pytest.fixture(scope="session")
 def color_mapping():
     """Returns a utility class which can replace keys in strings in the form "{NAME}"

testing/test_conftest.py

@@ -222,35 +222,14 @@ 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
-    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"
+    p = pytester.makepyfile(
+        """
+            def test_x(my_option):
+                assert my_option is None
+            """
     )
-
-    # 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
+    result = pytester.runpytest(p)
+    result.assert_outcomes(failed=0, passed=1)
 
 
 def test_conftest_confcutdir(pytester: Pytester) -> None: