REF: tests.indexes.numeric.py (#41192)

Author: topper-123

pandas/tests/indexes/categorical/test_category.py

@@ -17,13 +17,17 @@
 
 
 class TestCategoricalIndex(Base):
-    _holder = CategoricalIndex
+    _index_cls = CategoricalIndex
+
+    @pytest.fixture
+    def simple_index(self) -> CategoricalIndex:
+        return self._index_cls(list("aabbca"), categories=list("cab"), ordered=False)
 
     @pytest.fixture
     def index(self, request):
         return tm.makeCategoricalIndex(100)
 
-    def create_index(self, categories=None, ordered=False):
+    def create_index(self, *, categories=None, ordered=False):
         if categories is None:
             categories = list("cab")
         return CategoricalIndex(list("aabbca"), categories=categories, ordered=ordered)
@@ -33,9 +37,9 @@ def test_can_hold_identifiers(self):
         key = idx[0]
         assert idx._can_hold_identifiers_and_holds_name(key) is True
 
-    def test_insert(self):
+    def test_insert(self, simple_index):
 
-        ci = self.create_index()
+        ci = simple_index
         categories = ci.categories
 
         # test 0th element
@@ -70,9 +74,9 @@ def test_insert_na_mismatched_dtype(self):
         expected = Index([pd.NaT, 0, 1, 1], dtype=object)
         tm.assert_index_equal(result, expected)
 
-    def test_delete(self):
+    def test_delete(self, simple_index):
 
-        ci = self.create_index()
+        ci = simple_index
         categories = ci.categories
 
         result = ci.delete(0)