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# -*- ruby-indent-level: 4 -*-
require 'thread'
require 'test/unit'
class TC_Thread < Test::Unit::TestCase
def setup
Thread.abort_on_exception = true
end
def teardown
Thread.abort_on_exception = false
end
def test_condvar
mutex = Mutex.new
condvar = ConditionVariable.new
result = []
mutex.synchronize do
t = Thread.new do
mutex.synchronize do
result << 1
condvar.signal
end
end
result << 0
condvar.wait(mutex)
result << 2
t.join
end
assert_equal([0, 1, 2], result)
end
def test_condvar_wait_not_owner
mutex = Mutex.new
condvar = ConditionVariable.new
assert_raises(ThreadError) { condvar.wait(mutex) }
end
def test_condvar_wait_exception_handling
# Calling wait in the only thread running should raise a ThreadError of
# 'stopping only thread'
mutex = Mutex.new
condvar = ConditionVariable.new
Thread.abort_on_exception = false
locked = false
thread = Thread.new do
mutex.synchronize do
begin
condvar.wait(mutex)
rescue Exception
locked = mutex.locked?
raise
end
end
end
while !thread.stop?
sleep(0.1)
end
thread.raise Interrupt, "interrupt a dead condition variable"
assert_raises(Interrupt) { thread.value }
assert(locked)
end
def test_local_barrier
dir = File.dirname(__FILE__)
lbtest = File.join(dir, "lbtest.rb")
$:.unshift File.join(File.dirname(dir), 'ruby')
require 'envutil'
$:.shift
10.times {
result = `#{EnvUtil.rubybin} #{lbtest}`
assert(!$?.coredump?, '[ruby-dev:30653]')
assert_equal("exit.", result[/.*\Z/], '[ruby-dev:30653]')
}
end
def test_queue_rescue
require "timeout"
queue = Queue.new
assert_raises(Timeout::Error) {Timeout.timeout(0.001) {queue.pop}}
queue.push(1)
assert_nothing_raised("[ruby-dev:37545]") {assert_equal(1, queue.pop)}
assert(queue.empty?)
end
# This test checks that a thread in Mutex#lock which is raised is
# completely removed from the wait_list of the mutex
def test_mutex_exception_handling
m = Mutex.new
m.lock
sleeping = false
t = Thread.new do
begin
m.lock
rescue
end
sleeping = true
# Keep that thread alive: if the thread returns, the test method
# won't be able to check that +m+ has not been taken (dead mutex
# owners are ignored)
sleep
end
# Wait for t to wait for the mutex and raise it
while true
sleep 0.1
break if t.stop?
end
t.raise ArgumentError
assert(t.alive? || sleeping)
# Wait for +t+ to reach the sleep
while true
sleep 0.1
break if t.stop?
end
# Now unlock. The mutex should be free, so Mutex#unlock should return nil
assert(! m.unlock)
end
def test_mutex_join
m = Mutex.new
m.lock
wt2 = Thread.new do
m.lock
sleep 0.5
m.unlock
end
# Ensure wt2 is waiting on m
sleep 0.1
wt1 = Thread.new do
m.lock
m.unlock
end
# Ensure wt1 is waiting on m
sleep 0.1
# Give it to wt2
m.unlock
assert_nothing_raised {wt1.join}
end
end
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