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#
# Author:: Seth Chisamore (<schisamo@opscode.com>)
# Copyright:: Copyright (c) 2011 Opscode, Inc.
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
module Matchers
module LeakBase
include RSpec::Matchers
def initialize(opts={}, &block)
@warmup = opts[:warmup] || 5
@iterations = opts[:iterations] || 100
@variance = opts[:variance] || 1000
end
def failure_message_for_should
"expected final measure [#{@final_measure}] to be greater than or within +/- #{@variance} delta of initial measure [#{@initial_measure}]"
end
def failure_message_for_should_not
"expected final measure [#{@final_measure}] to be less than or within +/- #{@variance} delta of initial measure [#{@initial_measure}]"
end
private
def match(measure, given_proc)
profiler.start
@initial_measure = 0
@final_measure = 0
@warmup.times do
given_proc.call
end
@initial_measure = profiler.send(measure)
@iterations.times do
given_proc.call
end
profiler.stop
@final_measure = profiler.send(measure)
@final_measure > (@initial_measure + @variance)
end
def profiler
@profiler ||= begin
if Chef::Platform.windows?
require File.join(File.dirname(__FILE__), '..', 'prof', 'win32')
RSpec::Prof::Win32::Profiler.new
else
require File.join(File.dirname(__FILE__), '..', 'prof', 'gc')
RSpec::Prof::GC::Profiler.new
end
end
end
end
class LeakMemory
include LeakBase
def matches?(given_proc)
match(:working_set_size, given_proc)
end
end
class LeakHandles
include LeakBase
def matches?(given_proc)
match(:handle_count, given_proc)
end
end
def leak_memory(opts, &block)
Matchers::LeakMemory.new(opts, &block)
end
def leak_handles(opts, &block)
Matchers::LeakHandles.new(opts, &block)
end
end
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