improvement: more module helpers

test: add regression test
improvement: wrap code in `==code==` so you can tell what is being `puts`

lib/common.ex

@@ -57,6 +57,7 @@ defmodule Igniter.Common do
     |> Zipper.subtree()
     |> Zipper.root()
     |> Sourceror.to_string()
+    |> then(&"==code==\n#{&1}\n==code==\n")
     |> IO.puts()
 
     zipper
@@ -539,8 +540,10 @@ defmodule Igniter.Common do
     |> Zipper.subtree()
     |> Zipper.root()
     |> case do
-      {:__block__, _, [_]} ->
-        Zipper.down(zipper)
+      {:__block__, _, _} ->
+        zipper
+        |> Zipper.down()
+        |> maybe_move_to_block()
 
       _ ->
         zipper

lib/module.ex

@@ -4,6 +4,25 @@ defmodule Igniter.Module do
     Module.concat(module_name_prefix(), suffix)
   end
 
+  def proper_location(module_name) do
+    path =
+      module_name
+      |> Module.split()
+      |> Enum.map(&to_string/1)
+      |> Enum.map(&Macro.underscore/1)
+
+    last = List.last(path)
+    leading = :lists.droplast(path)
+
+    Path.join(["lib" | leading] ++ ["#{last}.ex"])
+  end
+
+  def parse(module_name) do
+    module_name
+    |> String.split(".")
+    |> Module.concat()
+  end
+
   def module_name_prefix do
     Mix.Project.get!()
     |> Module.split()

test/config_test.exs

@@ -33,6 +33,31 @@ defmodule Igniter.ConfigTest do
              """
     end
 
+    @tag :regression
+    test "it merges the spark formatter plugins" do
+      %{rewrite: rewrite} =
+        Igniter.new()
+        |> Igniter.Config.configure(
+          "fake.exs",
+          :spark,
+          [:formatter, :"Ash.Resource"],
+          [],
+          fn x ->
+            x
+          end
+        )
+        |> Igniter.Config.configure("fake.exs", :spark, [:formatter, :"Ash.Domain"], [], fn x ->
+          x
+        end)
+
+      config_file = Rewrite.source!(rewrite, "config/fake.exs")
+
+      assert Source.get(config_file, :content) == """
+             import Config
+             config :spark, formatter: ["Ash.Domain": [], "Ash.Resource": []]
+             """
+    end
+
     test "it merges with 2 arg version of existing config with a single path item" do
       %{rewrite: rewrite} =
         Igniter.new()