Move the test helpers to NextLS.Support.Utils

test/next_ls/extensions/credo_extension/remove_debugger_test.exs

@@ -1,7 +1,7 @@
 defmodule NextLS.CredoExtension.CodeAction.RemoveDebuggerTest do
   use ExUnit.Case, async: true
 
-  import NextLS.Test
+  import NextLS.Support.Utils, only: [assert_is_text_edit: 3]
 
   alias GenLSP.Structures.CodeAction
   alias GenLSP.Structures.Position

test/support/utils.ex

@@ -4,6 +4,10 @@ defmodule NextLS.Support.Utils do
   import ExUnit.Callbacks
   import GenLSP.Test
 
+  alias GenLSP.Structures.Position
+  alias GenLSP.Structures.Range
+  alias GenLSP.Structures.TextEdit
+
   def mix_exs do
     """
     defmodule Project.MixProject do
@@ -172,4 +176,32 @@ defmodule NextLS.Support.Utils do
                })
     end
   end
+
+  def apply_edit(code, edit) when is_binary(code), do: apply_edit(String.split(code, "\n"), edit)
+
+  def apply_edit(lines, %TextEdit{} = edit) when is_list(lines) do
+    text = edit.new_text
+    %Range{start: %Position{line: startl, character: startc}, end: %Position{line: endl, character: endc}} = edit.range
+
+    startl_text = Enum.at(lines, startl)
+    prefix = String.slice(startl_text, 0, startc)
+
+    endl_text = Enum.at(lines, endl)
+    suffix = String.slice(endl_text, endc, String.length(endl_text) - endc)
+
+    replacement = prefix <> text <> suffix
+
+    new_lines = Enum.slice(lines, 0, startl) ++ [replacement] ++ Enum.slice(lines, endl + 1, Enum.count(lines))
+
+    new_lines
+    |> Enum.join("\n")
+    |> String.trim()
+  end
+
+  defmacro assert_is_text_edit(code, edit, expected) do
+    quote do
+      actual = unquote(__MODULE__).apply_edit(unquote(code), unquote(edit))
+      assert actual == unquote(expected)
+    end
+  end
 end