func (s *flockSuite) TestUnlock(c *gc.C) {
dir := c.MkDir()
lock, err := container.NewLock(dir, "testing")
c.Assert(err, jc.ErrorIsNil)
err = lock.Lock("test")
c.Assert(err, jc.ErrorIsNil)
c.Assert(container.IsLocked(lock), jc.IsTrue)
err = lock.Unlock()
c.Assert(err, jc.ErrorIsNil)
c.Assert(container.IsLocked(lock), jc.IsFalse)
}
func (s *flockSuite) TestLockBlocks(c *gc.C) {
dir := c.MkDir()
lock1, err := container.NewLock(dir, "testing")
c.Assert(err, jc.ErrorIsNil)
c.Assert(container.IsLocked(lock1), jc.IsFalse)
lock2, err := container.NewLock(dir, "testing")
c.Assert(err, jc.ErrorIsNil)
c.Assert(container.IsLocked(lock2), jc.IsFalse)
acquired := make(chan struct{})
err = lock1.Lock("")
c.Assert(err, jc.ErrorIsNil)
c.Assert(container.IsLocked(lock1), jc.IsTrue)
go func() {
lock2.Lock("")
c.Assert(container.IsLocked(lock2), jc.IsTrue)
acquired <- struct{}{}
close(acquired)
}()
// Waiting for something not to happen is inherently hard...
select {
case <-acquired:
c.Fatalf("Unexpected lock acquisition")
case <-time.After(coretesting.ShortWait):
// all good
}
err = lock1.Unlock()
c.Assert(err, jc.ErrorIsNil)
c.Assert(container.IsLocked(lock1), jc.IsFalse)
select {
case <-acquired:
// all good
case <-time.After(coretesting.LongWait):
c.Fatalf("Expected lock acquisition")
}
}