refactor test function

Author: topper-123

pandas/tests/indexes/interval/test_interval.py

@@ -427,23 +427,39 @@ def test_maybe_convert_i8_nat(self, breaks):
         [
             IntervalIndex.from_breaks,
             lambda breaks: Interval(breaks[0], breaks[1]),
-            lambda breaks: breaks,
             lambda breaks: breaks[0],
-            list,
         ],
-        ids=["IntervalIndex", "Interval", "Index", "scalar", "list"],
+        ids=["IntervalIndex", "Interval", "scalar"],
     )
     def test_maybe_convert_i8_numeric(self, breaks, make_key):
         # GH 20636
         index = IntervalIndex.from_breaks(breaks)
         key = make_key(breaks)
 
         result = index._maybe_convert_i8(key)
-        if not isinstance(result, NumericIndex):
-            assert result is key
-        else:
-            expected = NumericIndex(key)
-            tm.assert_index_equal(result, expected)
+        assert result is key
+
+    @pytest.mark.parametrize(
+        "breaks",
+        [np.arange(5, dtype="int64"), np.arange(5, dtype="float64")],
+        ids=lambda x: str(x.dtype),
+    )
+    @pytest.mark.parametrize(
+        "make_key",
+        [
+            lambda breaks: breaks,
+            list,
+        ],
+        ids=["Index", "list"],
+    )
+    def test_maybe_convert_i8_numeric_listlike(self, breaks, make_key):
+        # GH 20636
+        index = IntervalIndex.from_breaks(breaks)
+        key = make_key(breaks)
+
+        result = index._maybe_convert_i8(key)
+        expected = NumericIndex(key)
+        tm.assert_index_equal(result, expected)
 
     @pytest.mark.parametrize(
         "breaks1, breaks2",