Permit aruba to use absolutely paths

Author: bbpennel

spec/spec_helper.rb

@@ -1,13 +1,21 @@
 require 'longleaf'
 require 'factory_bot'
 require 'simplecov'
+require 'aruba/rspec'
 require_relative 'support/db_helpers'
 SimpleCov.profiles.define 'no_vendor_coverage' do
   add_filter '.bundle'
 end
 
 SimpleCov.start 'no_vendor_coverage'
 
+# Longleaf tests intentionally work with real absolute paths on the filesystem
+# (preservation storage locations, config files, etc.), so allow Aruba to
+# accept absolute paths when piping files to commands under test.
+Aruba.configure do |config|
+  config.allow_absolute_paths = true
+end
+
 # This file was generated by the `rspec --init` command. Conventionally, all
 # specs live under a `spec` directory, which RSpec adds to the `$LOAD_PATH`.
 # The generated `.rspec` file contains `--require spec_helper` which will cause