fix some tests

apps/language_server/lib/language_server/location.ex

@@ -66,7 +66,7 @@ defmodule ElixirLS.LanguageServer.Location do
         # location; in this case try to find a "core" Elixir source file under
         # the configured Elixir source path.
         with elixir_src when is_binary(elixir_src) <-
-               Application.get_env(:elixir_sense, :elixir_src),
+               Application.get_env(:language_server, :elixir_src),
              file =
                String.replace(
                  file,

apps/language_server/test/location_test.exs

@@ -4,12 +4,12 @@ defmodule ElixirLS.LanguageServer.LocationTest do
   alias ElixirLS.LanguageServer.Location
 
   setup do
-    elixir_src = Path.join(File.cwd!(), "/test/misc/mock_elixir_src")
+    elixir_src = Path.join(__DIR__, "/misc/mock_elixir_src")
     # TODO make this work and expose via config
-    Application.put_env(:elixir_sense, :elixir_src, elixir_src)
+    Application.put_env(:language_server, :elixir_src, elixir_src)
 
     on_exit(fn ->
-      Application.delete_env(:elixir_sense, :elixir_src)
+      Application.delete_env(:language_server, :elixir_src)
     end)
   end
 

apps/language_server/test/misc/mock_elixir_src/lib/elixir/lib/string.ex

@@ -0,0 +1,35 @@
+import Kernel, except: [length: 1]
+
+defmodule String do
+  @typedoc """
+  A UTF-8 encoded binary.
+
+  The types `String.t()` and `binary()` are equivalent to analysis tools.
+  Although, for those reading the documentation, `String.t()` implies
+  it is a UTF-8 encoded binary.
+  """
+  @type t :: binary
+
+  @doc """
+  Returns the number of Unicode graphemes in a UTF-8 string.
+
+  ## Examples
+
+      iex> String.length("elixir")
+      6
+
+      iex> String.length("եոգլի")
+      5
+
+  """
+  @spec length(t) :: non_neg_integer
+  def length(string) when is_binary(string), do: length(string, 0)
+
+  defp length(gcs, acc) do
+    case :unicode_util.gc(gcs) do
+      [_ | rest] -> length(rest, acc + 1)
+      [] -> acc
+      {:error, <<_, rest::bits>>} -> length(rest, acc + 1)
+    end
+  end
+end