Implement SetItem tests

Author: WillAyd

pandas/core/arrays/list_.py

@@ -207,6 +207,10 @@ def __getitem__(self, item):
 
         return type(self)(self._pa_array[item])
 
+    def __setitem__(self, key, value) -> None:
+        msg = "ListArray does not support item assignment via setitem"
+        raise TypeError(msg)
+
     @classmethod
     def _empty(cls, shape: Shape, dtype: ExtensionDtype):
         """

pandas/tests/extension/list/test_list.py

@@ -32,6 +32,7 @@
 from pandas.tests.extension.base.printing import BasePrintingTests
 from pandas.tests.extension.base.reduce import BaseReduceTests
 from pandas.tests.extension.base.reshaping import BaseReshapingTests
+from pandas.tests.extension.base.setitem import BaseSetitemTests
 
 # TODO(wayd): This is copied from string tests - is it required here?
 # @pytest.fixture(params=[True, False])
@@ -86,7 +87,7 @@ class TestListArray(
     BasePrintingTests,
     BaseReduceTests,
     BaseReshapingTests,
-    # BaseSetitemTests,
+    BaseSetitemTests,
     Dim2CompatTests,
 ):
     # TODO(wayd): The tests here are copied from test_arrow.py