Make beam loader to use the new beams directory

Author: Premwoik

test/support/helpers.ex

@@ -1,11 +1,12 @@
 defmodule Gradient.TestHelpers do
   alias Gradient.Types, as: T
 
-  @examples_path "test/examples/"
+  @examples_path "test/examples"
+  @examples_build_path "test/examples/_build"
 
   @spec load(String.t()) :: T.forms()
   def load(beam_file) do
-    beam_file = String.to_charlist(@examples_path <> beam_file)
+    beam_file = String.to_charlist(Path.join(@examples_build_path, beam_file))
 
     {:ok, {_, [abstract_code: {:raw_abstract_v1, ast}]}} =
       :beam_lib.chunks(beam_file, [:abstract_code])
@@ -15,8 +16,8 @@ defmodule Gradient.TestHelpers do
 
   @spec load(String.t(), String.t()) :: {T.tokens(), T.forms()}
   def load(beam_file, ex_file) do
-    beam_file = String.to_charlist(@examples_path <> beam_file)
-    ex_file = @examples_path <> ex_file
+    beam_file = String.to_charlist(Path.join(@examples_build_path, beam_file))
+    ex_file = Path.join(@examples_path, ex_file)
 
     {:ok, {_, [abstract_code: {:raw_abstract_v1, ast}]}} =
       :beam_lib.chunks(beam_file, [:abstract_code])
@@ -30,8 +31,8 @@ defmodule Gradient.TestHelpers do
 
   @spec example_data() :: {T.tokens(), T.forms()}
   def example_data() do
-    beam_path = (@examples_path <> "Elixir.SimpleApp.beam") |> String.to_charlist()
-    file_path = @examples_path <> "simple_app.ex"
+    beam_path = Path.join(@examples_build_path, "Elixir.SimpleApp.beam") |> String.to_charlist()
+    file_path = Path.join(@examples_path, "simple_app.ex")
 
     code =
       File.read!(file_path)
@@ -50,7 +51,7 @@ defmodule Gradient.TestHelpers do
 
   @spec example_tokens() :: T.tokens()
   def example_tokens() do
-    file_path = @examples_path <> "conditional/cond.ex"
+    file_path = Path.join(@examples_path, "conditional/cond.ex")
 
     code =
       File.read!(file_path)
@@ -65,7 +66,7 @@ defmodule Gradient.TestHelpers do
 
   @spec example_string_tokens() :: T.tokens()
   def example_string_tokens() do
-    file_path = @examples_path <> "string_example.ex"
+    file_path = Path.join(@examples_path, "string_example.ex")
 
     code =
       File.read!(file_path)