lease: stop lessors after tests

Signed-off-by: Gyu-Ho Lee <gyuhox@gmail.com>

lease/lessor_test.go

@@ -42,6 +42,7 @@ func TestLessorGrant(t *testing.T) {
 	defer be.Close()
 
 	le := newLessor(be, minLeaseTTL)
+	defer le.Stop()
 	le.Promote(0)
 
 	l, err := le.Grant(1, 1)
@@ -87,6 +88,7 @@ func TestLeaseConcurrentKeys(t *testing.T) {
 	defer be.Close()
 
 	le := newLessor(be, minLeaseTTL)
+	defer le.Stop()
 	le.SetRangeDeleter(func() TxnDelete { return newFakeDeleter(be) })
 
 	// grant a lease with long term (100 seconds) to
@@ -134,6 +136,7 @@ func TestLessorRevoke(t *testing.T) {
 	defer be.Close()
 
 	le := newLessor(be, minLeaseTTL)
+	defer le.Stop()
 	var fd *fakeDeleter
 	le.SetRangeDeleter(func() TxnDelete {
 		fd = newFakeDeleter(be)
@@ -185,6 +188,7 @@ func TestLessorRenew(t *testing.T) {
 	defer os.RemoveAll(dir)
 
 	le := newLessor(be, minLeaseTTL)
+	defer le.Stop()
 	le.Promote(0)
 
 	l, err := le.Grant(1, minLeaseTTL)
@@ -240,6 +244,7 @@ func TestLessorRenewExtendPileup(t *testing.T) {
 	be = backend.New(bcfg)
 	defer be.Close()
 	le = newLessor(be, minLeaseTTL)
+	defer le.Stop()
 
 	// extend after recovery should extend expiration on lease pile-up
 	le.Promote(0)
@@ -268,6 +273,7 @@ func TestLessorDetach(t *testing.T) {
 	defer be.Close()
 
 	le := newLessor(be, minLeaseTTL)
+	defer le.Stop()
 	le.SetRangeDeleter(func() TxnDelete { return newFakeDeleter(be) })
 
 	// grant a lease with long term (100 seconds) to
@@ -307,6 +313,7 @@ func TestLessorRecover(t *testing.T) {
 	defer be.Close()
 
 	le := newLessor(be, minLeaseTTL)
+	defer le.Stop()
 	l1, err1 := le.Grant(1, 10)
 	l2, err2 := le.Grant(2, 20)
 	if err1 != nil || err2 != nil {
@@ -315,6 +322,7 @@ func TestLessorRecover(t *testing.T) {
 
 	// Create a new lessor with the same backend
 	nle := newLessor(be, minLeaseTTL)
+	defer nle.Stop()
 	nl1 := nle.Lookup(l1.ID)
 	if nl1 == nil || nl1.ttl != l1.ttl {
 		t.Errorf("nl1 = %v, want nl1.ttl= %d", nl1.ttl, l1.ttl)