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#!/usr/bin/env ruby
# encoding: UTF-8
require File.expand_path('../test_helper', __FILE__)
require 'timeout'
require 'benchmark'
# -- Tests ----
class ThreadTest < TestCase
def setup
# Need to use wall time for this test due to the sleep calls
RubyProf::measure_mode = RubyProf::WALL_TIME
end
def test_thread_count
RubyProf.start
thread = Thread.new do
sleep(1)
end
thread.join
result = RubyProf.stop
assert_equal(2, result.threads.length)
end
def test_thread_identity
RubyProf.start
sleep_thread = Thread.new do
sleep(1)
end
sleep_thread.join
result = RubyProf.stop
thread_ids = result.threads.map {|thread| thread.id}.sort
threads = [Thread.current, sleep_thread]
assert_equal(2, result.threads.length)
assert(thread_ids.include?(threads[0].object_id))
assert(thread_ids.include?(threads[1].object_id))
assert_instance_of(Thread, ObjectSpace._id2ref(thread_ids[0]))
assert(threads.include?(ObjectSpace._id2ref(thread_ids[0])))
assert_instance_of(Thread, ObjectSpace._id2ref(thread_ids[1]))
assert(threads.include?(ObjectSpace._id2ref(thread_ids[1])))
end
def test_thread_timings
RubyProf.start
thread = Thread.new do
sleep 0
# force it to hit thread.join, below, first
# thus forcing sleep(1), below, to be counted as (wall) self_time
# since we currently count time "in some other thread" as self.wait_time
# for whatever reason
sleep(1)
end
thread.join
result = RubyProf.stop
# Check background thread
assert_equal(2, result.threads.length)
rp_thread = result.threads.detect {|t| t.id == thread.object_id}
methods = rp_thread.methods.sort.reverse
# fails on travis. why?
# expected_methods = ["ThreadTest#test_thread_timings", "Kernel#sleep"]
# assert_equal(expected_methods, methods.map(&:full_name))
method = methods[0]
assert_equal('ThreadTest#test_thread_timings', method.full_name)
assert_equal(1, method.called)
assert_in_delta(1, method.total_time, 0.05)
assert_in_delta(0, method.self_time, 0.05)
assert_in_delta(0, method.wait_time, 0.05)
assert_in_delta(1, method.children_time, 0.05)
assert_equal(1, method.call_infos.length)
call_info = method.call_infos[0]
assert_equal('ThreadTest#test_thread_timings', call_info.call_sequence)
assert_equal(1, call_info.children.length)
method = methods[1]
assert_equal('Kernel#sleep', method.full_name)
assert_equal(2, method.called)
assert_in_delta(1, method.total_time, 0.05)
assert_in_delta(1.0, method.self_time, 0.05)
assert_in_delta(0, method.wait_time, 0.05)
assert_in_delta(0, method.children_time, 0.05)
assert_equal(1, method.call_infos.length)
call_info = method.call_infos[0]
assert_equal('ThreadTest#test_thread_timings->Kernel#sleep', call_info.call_sequence)
assert_equal(0, call_info.children.length)
# Check foreground thread
rp_thread = result.threads.detect {|athread| athread.id == Thread.current.object_id}
methods = rp_thread.methods.sort.reverse
assert_equal(4, methods.length)
methods = methods.sort.reverse
method = methods[0]
assert_equal('ThreadTest#test_thread_timings', method.full_name)
# the sub calls to Object#new, when popped,
# cause the parent frame to be created for method #test_thread_timings, which means a +1 when it's popped in the end
# xxxx a test that shows it the other way, too (never creates parent frame--if that's even possible)
assert_equal(1, method.called)
assert_in_delta(1, method.total_time, 0.05)
assert_in_delta(0, method.self_time, 0.05)
assert_in_delta(0, method.wait_time, 0.05)
assert_in_delta(1, method.children_time, 0.05)
assert_equal(1, method.call_infos.length)
call_info = method.call_infos[0]
assert_equal('ThreadTest#test_thread_timings', call_info.call_sequence)
assert_equal(2, call_info.children.length)
method = methods[1]
assert_equal('Thread#join', method.full_name)
assert_equal(1, method.called)
assert_in_delta(1, method.total_time, 0.05)
assert_in_delta(0, method.self_time, 0.05)
assert_in_delta(1.0, method.wait_time, 0.05)
assert_in_delta(0, method.children_time, 0.05)
assert_equal(1, method.call_infos.length)
call_info = method.call_infos[0]
assert_equal('ThreadTest#test_thread_timings->Thread#join', call_info.call_sequence)
assert_equal(0, call_info.children.length)
method = methods[2]
assert_equal('<Class::Thread>#new', method.full_name)
assert_equal(1, method.called)
assert_in_delta(0, method.total_time, 0.05)
assert_in_delta(0, method.self_time, 0.05)
assert_in_delta(0, method.wait_time, 0.05)
assert_in_delta(0, method.children_time, 0.05)
assert_equal(1, method.call_infos.length)
call_info = method.call_infos[0]
assert_equal('ThreadTest#test_thread_timings-><Class::Thread>#new', call_info.call_sequence)
assert_equal(1, call_info.children.length)
method = methods[3]
assert_equal('Thread#initialize', method.full_name)
assert_equal(1, method.called)
assert_in_delta(0, method.total_time, 0.05)
assert_in_delta(0, method.self_time, 0.05)
assert_in_delta(0, method.wait_time, 0.05)
assert_in_delta(0, method.children_time, 0.05)
assert_equal(1, method.call_infos.length)
call_info = method.call_infos[0]
assert_equal('ThreadTest#test_thread_timings-><Class::Thread>#new->Thread#initialize', call_info.call_sequence)
assert_equal(0, call_info.children.length)
end
# useless test: what does it test?
def test_thread_back_and_forth
result = nil
seconds = Benchmark.realtime do
result = RubyProf.profile do
a = Thread.new { 100_000.times { sleep 0 }}
b = Thread.new { 100_000.times { sleep 0 }}
a.join
b.join
end
end
methods = result.threads.map {|thread| thread.methods}
timings = methods.flatten.sort
assert(timings[-1].total_time < seconds)
end
# useless test: what does it test?
def test_thread
RubyProf.profile do
begin
Timeout::timeout(2) do
while true
next
end
end
rescue Timeout::Error
end
end
end
end
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