Remove Files gem as a dependency (#30)

Pulled from ctran/annotate_models#982. Credit to
@petergoldstein.

Author: drwl

Gemfile

@@ -18,6 +18,5 @@ group :development, :test do
 end
 
 group :test do
-  gem 'files', require: false, path: "vendor/files"
   gem 'git', require: false
 end

spec/lib/annotate_rb/model_annotator/model_files_getter_spec.rb

@@ -18,18 +18,15 @@
 
     context 'when `model_dir` is valid' do
       let(:model_dir) do
-        Files do
-          file 'foo.rb'
-          dir 'bar' do
-            file 'baz.rb'
-            dir 'qux' do
-              file 'quux.rb'
-            end
-          end
-          dir 'concerns' do
-            file 'corge.rb'
-          end
-        end
+        dir = Dir.mktmpdir
+        FileUtils.touch(File.join(dir, 'foo.rb'))
+        FileUtils.mkdir_p(File.join(dir, 'bar'))
+        FileUtils.touch(File.join(dir, 'bar', 'baz.rb'))
+        FileUtils.mkdir_p(File.join(dir, 'bar', 'qux'))
+        FileUtils.touch(File.join(dir, 'bar', 'qux', 'quux.rb'))
+        FileUtils.mkdir_p(File.join(dir, 'concerns'))
+        FileUtils.touch(File.join(dir, 'concerns', 'corge.rb'))
+        dir
       end
 
       context 'when the model files are not specified' do

spec/spec_helper.rb

@@ -5,7 +5,6 @@
 require 'active_support/core_ext/object/blank'
 require 'active_support/core_ext/class/subclasses'
 require 'active_support/core_ext/string/inflections'
-require 'files'
 require 'byebug'
 require 'bigdecimal'
 require 'tmpdir'

spec/support/annotate_test_helpers.rb

@@ -10,7 +10,7 @@ def annotate_one_file(options = {})
   def write_model(file_name, file_content)
     fname = File.join(@model_dir, file_name)
     FileUtils.mkdir_p(File.dirname(fname))
-    File.open(fname, 'wb') { |f| f.write file_content }
+    File.binwrite(fname, file_content)
 
     [fname, file_content]
   end