assert_sql

# File activerecord/lib/active_record/test_case.rb, line 15
    def assert_sql(*patterns_to_match)
      $queries_executed = []
      yield
    ensure
      failed_patterns = []
      patterns_to_match.each do |pattern|
        failed_patterns << pattern unless $queries_executed.any?{ |sql| pattern === sql }
      end
      assert failed_patterns.empty?, "Query pattern(s) #{failed_patterns.map(&:inspect).join(', ')} not found."
    end