rspec-puppet JSON attribute value comparison

query_spec.rb

require 'spec_helper'
require 'json'

fixture_dir = File.expand_path(File.join(__FILE__, '..', '..', 'fixtures', 'data'))

describe 'jmxtrans::query' do
  def check_json_string(expected)
    return Proc.new do |actual|
      begin
        expected_obj = JSON.parse(expected)
        actual_obj = JSON.parse(actual)
        expected_obj == actual_obj
      rescue JSON.ParserError
        false
      end
    end
  end

  context 'jmxtrans::query minimal' do
    let(:title) { 'puppetserver' }
    let(:params) {{
      :host    => 'w2',
      :port    => 1099,
      :queries => []
    }}

    output = File.read(File.join(fixture_dir, 'minimal.json'))

    it do
      is_expected.to contain_file('/var/lib/jmxtrans/puppetserver.json').with({
        :ensure  => 'file',
        :owner   => 'jmxtrans',
        :mode    => '0640',
        :content => check_json_string(output)
      })
    end
  end
end