test/test_metric.rb

   1 require File.dirname(__FILE__) + '/helper'
   2
   3 class TestMetric < Test::Unit::TestCase
   4   def setup
   5     @metric = Metric.new(stub(:interval => 10), nil)
   6   end
   7
   8   # watch
   9
  10   def test_watch
  11     w = stub()
  12     m = Metric.new(w, nil)
  13     assert_equal w, m.watch
  14   end
  15
  16   # destination
  17
  18   def test_destination
  19     d = stub()
  20     m = Metric.new(nil, d)
  21     assert_equal d, m.destination
  22   end
  23
  24   # condition
  25
  26   def test_condition_should_be_block_optional
  27     @metric.condition(:fake_poll_condition)
  28     assert_equal 1, @metric.conditions.size
  29   end
  30
  31   def test_poll_condition_should_inherit_interval_from_watch_if_not_specified
  32     @metric.condition(:fake_poll_condition)
  33     assert_equal 10, @metric.conditions.first.interval
  34   end
  35
  36   def test_poll_condition_should_abort_if_no_interval_and_no_watch_interval
  37     metric = Metric.new(stub(:name => 'foo', :interval => nil), nil)
  38
  39     assert_abort do
  40       metric.condition(:fake_poll_condition)
  41     end
  42   end
  43
  44   def test_condition_should_allow_generation_of_subclasses_of_poll_or_event
  45     metric = Metric.new(stub(:name => 'foo', :interval => 10), nil)
  46
  47     assert_nothing_raised do
  48       metric.condition(:fake_poll_condition)
  49       metric.condition(:fake_event_condition)
  50     end
  51   end
  52
  53   def test_condition_should_abort_if_not_subclass_of_poll_or_event
  54     metric = Metric.new(stub(:name => 'foo', :interval => 10), nil)
  55
  56     assert_abort do
  57       metric.condition(:fake_condition) { |c| }
  58     end
  59   end
  60
  61   def test_condition_should_abort_on_invalid_condition
  62     assert_abort do
  63       @metric.condition(:fake_poll_condition) { |c| c.stubs(:valid?).returns(false) }
  64     end
  65   end
  66
  67   def test_condition_should_abort_on_no_such_condition
  68     assert_abort do
  69       @metric.condition(:invalid) { }
  70     end
  71   end
  72
  73   # enable
  74
  75   def test_enable_should_attach_conditions
  76     @metric.condition(:fake_poll_condition)
  77     Hub.expects(:attach).with(@metric.conditions.first, @metric)
  78     @metric.enable
  79   end
  80
  81   # disable
  82
  83   def test_disable_should_detach_conditions
  84     @metric.condition(:fake_poll_condition)
  85     Hub.expects(:detach).with(@metric.conditions.first)
  86     @metric.disable
  87   end
  88 end