Remove methods from ObfuscateFilename and spec (#3347)

* Remove methods from ObfuscateFilename

* Spec ObfuscateFilename

spec/controllers/concerns/obfuscate_filename_spec.rb

@@ -0,0 +1,30 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+describe ApplicationController, type: :controller do
+  controller do
+    include ObfuscateFilename
+
+    obfuscate_filename :file
+
+    def file
+      render plain: params[:file]&.original_filename
+    end
+  end
+
+  before do
+    routes.draw { get 'file' => 'anonymous#file' }
+  end
+
+  it 'obfusticates filename if the given parameter is specified' do
+    file = fixture_file_upload('files/imports.txt', 'text/plain')
+    post 'file', params: { file: file }
+    expect(response.body).to end_with '.txt'
+    expect(response.body).not_to include 'imports'
+  end
+
+  it 'does nothing if the given parameter is not specified' do
+    post 'file'
+  end
+end