TST: Added regression test empty percentile, in ref to numpy#6530 and numpy#6553

Author: yashmehrotra

numpy/core/tests/test_regression.py

@@ -2173,5 +2173,9 @@ def test_leak_in_structured_dtype_comparison(self):
         after = sys.getrefcount(a)
         assert_equal(before, after)
 
+    def test_empty_percentile(self):
+        # gh-6530 / gh-6553
+        assert_array_equal(np.percentile(np.arange(10), []), np.array([]))
+
 if __name__ == "__main__":
     run_module_suite()