require_relative '../../spec_helper' describe "Mutex#sleep" do describe "when not locked by the current thread" do it "raises a ThreadError" do m = Mutex.new lambda { m.sleep }.should raise_error(ThreadError) end it "raises an ArgumentError if passed a negative duration" do m = Mutex.new lambda { m.sleep(-0.1) }.should raise_error(ArgumentError) lambda { m.sleep(-1) }.should raise_error(ArgumentError) end end it "raises an ArgumentError if passed a negative duration" do m = Mutex.new m.lock lambda { m.sleep(-0.1) }.should raise_error(ArgumentError) lambda { m.sleep(-1) }.should raise_error(ArgumentError) end it "pauses execution for approximately the duration requested" do m = Mutex.new m.lock duration = 0.1 start = Process.clock_gettime(Process::CLOCK_MONOTONIC) m.sleep duration now = Process.clock_gettime(Process::CLOCK_MONOTONIC) (now - start).should > 0 (now - start).should < 2.0 end it "unlocks the mutex while sleeping" do m = Mutex.new locked = false th = Thread.new { m.lock; locked = true; m.sleep } Thread.pass until locked Thread.pass while th.status and th.status != "sleep" m.locked?.should be_false th.run th.join end it "relocks the mutex when woken" do m = Mutex.new m.lock m.sleep(0.01) m.locked?.should be_true end it "relocks the mutex when woken by an exception being raised" do m = Mutex.new locked = false th = Thread.new do m.lock locked = true begin m.sleep rescue Exception m.locked? end end Thread.pass until locked Thread.pass while th.status and th.status != "sleep" th.raise(Exception) th.value.should be_true end it "returns the rounded number of seconds asleep" do m = Mutex.new m.lock m.sleep(0.01).should be_kind_of(Integer) end it "wakes up when requesting sleep times near or equal to zero" do times = [] val = 1 # power of two divisor so we eventually get near zero loop do val = val / 16.0 times << val break if val == 0.0 end m = Mutex.new m.lock times.each do |time| # just testing that sleep completes m.sleep(time).should_not == nil end end end