Test: Refactor test to use Tempfile

Author: stevepolitodesign

test/suspenders/cleanup/organize_gemfile_test.rb

@@ -1,4 +1,5 @@
 require "test_helper"
+require "tempfile"
 require_relative "../../../lib/suspenders/cleanup/organize_gemfile"
 
 module Suspenders
@@ -7,14 +8,15 @@ class OrganizeGemfileTest < ActiveSupport::TestCase
       test "organizes Gemfile by group" do
         original = file_fixture("gemfile_messy").read
         modified = file_fixture("gemfile_clean").read
-        File.open("foo_file", "w+") { _1.write original }
 
-        Suspenders::Cleanup::OrganizeGemfile.perform("foo_file")
+        Tempfile.create "Gemfile" do |gemfile|
+          gemfile.write original
+          gemfile.rewind
 
-        gemfile = File.read("foo_file")
-        assert_equal modified, gemfile
-      ensure
-        File.delete("foo_file")
+          Suspenders::Cleanup::OrganizeGemfile.perform(gemfile.path)
+
+          assert_equal modified, gemfile.read
+        end
       end
     end
   end