vendor/rails/activesupport/test/buffered_logger_test.rb

   1 require File.dirname(__FILE__) + '/abstract_unit'
   2 require 'stringio'
   3
   4 class BufferedLoggerTest < Test::Unit::TestCase
   5   def setup
   6     @message = "A debug message"
   7     @integer_message = 12345
   8     @output  = StringIO.new
   9     @logger  = ActiveSupport::BufferedLogger.new(@output)
  10   end
  11
  12   def test_should_log_debugging_message_when_debugging
  13     @logger.level = Logger::DEBUG
  14     @logger.add(Logger::DEBUG, @message)
  15     assert @output.string.include?(@message)
  16   end
  17
  18   def test_should_not_log_debug_messages_when_log_level_is_info
  19     @logger.level = Logger::INFO
  20     @logger.add(Logger::DEBUG, @message)
  21     assert ! @output.string.include?(@message)
  22   end
  23
  24   def test_should_add_message_passed_as_block_when_using_add
  25     @logger.level = Logger::INFO
  26     @logger.add(Logger::INFO) {@message}
  27     assert @output.string.include?(@message)
  28   end
  29
  30   def test_should_add_message_passed_as_block_when_using_shortcut
  31     @logger.level = Logger::INFO
  32     @logger.info {@message}
  33     assert @output.string.include?(@message)
  34   end
  35
  36   def test_should_convert_message_to_string
  37     @logger.level = Logger::INFO
  38     @logger.info @integer_message
  39     assert @output.string.include?(@integer_message.to_s)
  40   end
  41
  42   def test_should_convert_message_to_string_when_passed_in_block
  43     @logger.level = Logger::INFO
  44     @logger.info {@integer_message}
  45     assert @output.string.include?(@integer_message.to_s)
  46   end
  47
  48   def test_should_not_evaluate_block_if_message_wont_be_logged
  49     @logger.level = Logger::INFO
  50     evaluated = false
  51     @logger.add(Logger::DEBUG) {evaluated = true}
  52     assert evaluated == false
  53   end
  54
  55   def test_should_not_mutate_message
  56     message_copy = @message.dup
  57     @logger.info @message
  58     assert_equal message_copy, @message
  59   end
  60
  61
  62   [false, nil, 0].each do |disable|
  63     define_method "test_disabling_auto_flush_with_#{disable.inspect}_should_buffer_until_explicit_flush" do
  64       @logger.auto_flushing = disable
  65
  66       4.times do
  67         @logger.info 'wait for it..'
  68         assert @output.string.empty?, @output.string
  69       end
  70
  71       @logger.flush
  72       assert !@output.string.empty?, @logger.buffer.size
  73     end
  74
  75     define_method "test_disabling_auto_flush_with_#{disable.inspect}_should_flush_at_max_buffer_size_as_failsafe" do
  76       @logger.auto_flushing = disable
  77       assert_equal ActiveSupport::BufferedLogger::MAX_BUFFER_SIZE, @logger.auto_flushing
  78
  79       (ActiveSupport::BufferedLogger::MAX_BUFFER_SIZE - 1).times do
  80         @logger.info 'wait for it..'
  81         assert @output.string.empty?, @output.string
  82       end
  83
  84       @logger.info 'there it is.'
  85       assert !@output.string.empty?, @logger.buffer.size
  86     end
  87   end
  88
  89   def test_should_know_if_its_loglevel_is_below_a_given_level
  90     ActiveSupport::BufferedLogger::Severity.constants.each do |level|
  91       @logger.level = ActiveSupport::BufferedLogger::Severity.const_get(level) - 1
  92       assert @logger.send("#{level.downcase}?"), "didn't know if it was #{level.downcase}? or below"
  93     end
  94   end
  95
  96   def test_should_auto_flush_every_n_messages
  97     @logger.auto_flushing = 5
  98
  99     4.times do
 100       @logger.info 'wait for it..'
 101       assert @output.string.empty?, @output.string
 102     end
 103
 104     @logger.info 'there it is.'
 105     assert !@output.string.empty?, @output.string
 106   end
 107 end