Rewrite Logger.warn to Logger.warning

lib/style/single_node.ex

@@ -91,6 +91,9 @@ defmodule Styler.Style.SingleNode do
     if Style.empty_map?(collectable), do: {{:., dm, [{:__aliases__, am, [:Map]}, :new]}, funm, [enum | rest]}, else: node
   end
 
+  # Logger.warn -> Logger.warning
+  defp style({{:., dm, [{:__aliases__, am, [:Logger]}, :warn]}, funm, args}), do: {{:., dm, [{:__aliases__, am, [:Logger]}, :warning]}, funm, args}
+
   # Remove parens from 0 arity funs (Credo.Check.Readability.ParenthesesOnZeroArityDefs)
   defp style({def, dm, [{fun, funm, []} | rest]}) when def in ~w(def defp)a and is_atom(fun),
     do: style({def, dm, [{fun, Keyword.delete(funm, :closing), nil} | rest]})

test/style/single_node_test.exs

@@ -16,6 +16,11 @@ defmodule Styler.Style.SingleNodeTest do
     assert_style(~s|'"'|, ~s|~c"\\""|)
   end
 
+  test "Logger.warn to Logger.warning" do
+    assert_style("Logger.warn(foo)", "Logger.warning(foo)")
+    assert_style("Logger.warn(foo, bar)", "Logger.warning(foo, bar)")
+  end
+
   describe "def / defp" do
     test "0-arity functions have parens removed" do
       assert_style("def foo(), do: :ok", "def foo, do: :ok")
@@ -299,15 +304,15 @@ defmodule Styler.Style.SingleNodeTest do
         case foo do
           true -> :ok
           false ->
-            Logger.warn("it's false")
+            Logger.warning("it's false")
             nil
         end
         """,
         """
         if foo do
           :ok
         else
-          Logger.warn("it's false")
+          Logger.warning("it's false")
           nil
         end
         """