added test

Author: debnathshoham

pandas/core/array_algos/quantile.py

@@ -184,5 +184,5 @@ def _quantile_ea_fallback(
     try:
         out = type(values)._from_sequence(res, dtype=values.dtype)
     except TypeError:
-        out = np.atleast_2d(np.asarray(res))
+        out = np.atleast_2d(np.asarray(res, dtype=np.float64))
     return out

pandas/tests/series/methods/test_quantile.py

@@ -217,3 +217,9 @@ def test_quantile_empty(self):
         res = s.quantile([0.5])
         exp = Series([pd.NaT], index=[0.5])
         tm.assert_series_equal(res, exp)
+
+    @pytest.mark.parametrize("dtype", [int, float, "Int64"])
+    def test_quantile_dtypes(self, dtype):
+        result = Series([1, 2, 3], dtype=dtype).quantile(np.arange(0, 1, 0.25))
+        expected = Series(np.arange(1, 3, 0.5), index=np.arange(0, 1, 0.25))
+        tm.assert_series_equal(result, expected)