use Range.new/3 explicitly passing the step of -1

CHANGELOG.md

@@ -12,6 +12,7 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 - Added `cycled` option for `Timex.between?/4` to support time-range checks that pass through midnight
 - Add Croatian translation
 - Changed charlists from the deprecated `''` to `~c""`
+- Changed negative range to pass the step of default value for suppressing deprecation warnings
 
 ### Fixed
 

lib/parse/datetime/helpers.ex

@@ -159,13 +159,13 @@ defmodule Timex.Parse.DateTime.Helpers do
 
     case {padding, min_width, max_width} do
       {:zeroes, _, nil} -> Text.integer()
-      {:zeroes, min, max} -> choice(Enum.map(max..min, &fixed_integer(&1)))
+      {:zeroes, min, max} -> choice(Enum.map(max..min//-1, &fixed_integer(&1)))
       {:spaces, -1, nil} -> skip(spaces()) |> Text.integer()
       {:spaces, min, nil} -> skip(spaces()) |> fixed_integer(min)
-      {:spaces, _, max} -> skip(spaces()) |> choice(Enum.map(max..1, &fixed_integer(&1)))
+      {:spaces, _, max} -> skip(spaces()) |> choice(Enum.map(max..1//-1, &fixed_integer(&1)))
       {_, -1, nil} -> Text.integer()
       {_, min, nil} -> fixed_integer(min)
-      {_, min, max} -> choice(Enum.map(max..min, &fixed_integer(&1)))
+      {_, min, max} -> choice(Enum.map(max..min//-1, &fixed_integer(&1)))
     end
   end
 end

test/duration_test.exs

@@ -125,7 +125,7 @@ defmodule DurationTests do
 
   # Just make sure that Timex.Duration.measure is called at least once in the tests
   test "measure/1" do
-    reversed_list = Enum.to_list(100_000..1)
+    reversed_list = Enum.to_list(100_000..1//-1)
 
     assert {%Duration{} = d, ^reversed_list} =
              Duration.measure(fn -> Enum.reverse(1..100_000) end)

test/shift_test.exs

@@ -19,7 +19,7 @@ defmodule ShiftTests do
   property "is always lower than input date for negative shift values" do
     check all(
             input_date <- PropertyHelpers.date_time_generator(:struct),
-            shift <- StreamData.integer(-1..-1000),
+            shift <- StreamData.integer(-1..-1000//-1),
             unit <- StreamData.member_of(@units)
           ) do
       date = Timex.shift(input_date, [{unit, shift}])