FIX: create upload record for exported csv files

spec/components/validators/upload_validator_spec.rb

@@ -0,0 +1,28 @@
+require 'rails_helper'
+
+describe Validators::UploadValidator do
+  subject(:validator) { described_class.new }
+
+  describe 'validate' do
+    let(:user) { Fabricate(:user) }
+    let(:filename) { "discourse.csv" }
+    let(:csv_file) { file_from_fixtures(filename, "csv") }
+
+    it "should create an invalid upload when the filename is blank" do
+      SiteSetting.authorized_extensions = "*"
+      created_upload = UploadCreator.new(csv_file, nil).create_for(user.id)
+      validator.validate(created_upload)
+      expect(created_upload).to_not be_valid
+      expect(created_upload.errors.full_messages.first)
+            .to include(I18n.t("activerecord.errors.messages.blank"))
+    end
+
+    it "allows 'gz' as extension when uploading export file" do
+      SiteSetting.authorized_extensions = ""
+
+      created_upload = UploadCreator.new(csv_file, "#{filename}.gz", for_export: true).create_for(user.id)
+      expect(created_upload).to be_valid
+    end
+
+  end
+end