func checkKeyspaceLockTimeout(ctx context.Context, t *testing.T, ts topo.Impl) {
lockPath, err := ts.LockKeyspaceForAction(ctx, "test_keyspace", "fake-content")
if err != nil {
t.Fatalf("LockKeyspaceForAction: %v", err)
}
// test we can't take the lock again
fastCtx, cancel := context.WithTimeout(ctx, timeUntilLockIsTaken)
if _, err := ts.LockKeyspaceForAction(fastCtx, "test_keyspace", "unused-fake-content"); err != topo.ErrTimeout {
t.Fatalf("LockKeyspaceForAction(again): %v", err)
}
cancel()
// test we can interrupt taking the lock
interruptCtx, cancel := context.WithCancel(ctx)
go func() {
time.Sleep(timeUntilLockIsTaken)
cancel()
}()
if _, err := ts.LockKeyspaceForAction(interruptCtx, "test_keyspace", "unused-fake-content"); err != topo.ErrInterrupted {
t.Fatalf("LockKeyspaceForAction(interrupted): %v", err)
}
if err := ts.UnlockKeyspaceForAction(ctx, "test_keyspace", lockPath, "fake-results"); err != nil {
t.Fatalf("UnlockKeyspaceForAction(): %v", err)
}
// test we can't unlock again
if err := ts.UnlockKeyspaceForAction(ctx, "test_keyspace", lockPath, "fake-results"); err == nil {
t.Fatalf("UnlockKeyspaceForAction(again) worked")
}
}
// checkKeyspaceLockUnblocks makes sure that a routine waiting on a lock
// is unblocked when another routine frees the lock
func checkKeyspaceLockUnblocks(ctx context.Context, t *testing.T, ts topo.Impl) {
unblock := make(chan struct{})
finished := make(chan struct{})
// as soon as we're unblocked, we try to lock the keyspace
go func() {
<-unblock
lockPath, err := ts.LockKeyspaceForAction(ctx, "test_keyspace", "fake-content")
if err != nil {
t.Fatalf("LockKeyspaceForAction(test_keyspace) failed: %v", err)
}
if err = ts.UnlockKeyspaceForAction(ctx, "test_keyspace", lockPath, "fake-results"); err != nil {
t.Fatalf("UnlockKeyspaceForAction(test_keyspace): %v", err)
}
close(finished)
}()
// lock the keyspace
lockPath2, err := ts.LockKeyspaceForAction(ctx, "test_keyspace", "fake-content")
if err != nil {
t.Fatalf("LockKeyspaceForAction(test_keyspace) failed: %v", err)
}
// unblock the go routine so it starts waiting
close(unblock)
// sleep for a while so we're sure the go routine is blocking
time.Sleep(timeUntilLockIsTaken)
if err = ts.UnlockKeyspaceForAction(ctx, "test_keyspace", lockPath2, "fake-results"); err != nil {
t.Fatalf("UnlockKeyspaceForAction(test_keyspace): %v", err)
}
timeout := time.After(10 * time.Second)
select {
case <-finished:
case <-timeout:
t.Fatalf("unlocking timed out")
}
}