core: TestContext2Apply_createBeforeDestroy_hook

The instnace info ID has changed, and no longer reflects the type of
node. Record the state to determine apply order for this test.

terraform/context_apply_test.go

@@ -1008,8 +1008,9 @@ func TestContext2Apply_createBeforeDestroy_hook(t *testing.T) {
 	var actualLock sync.Mutex
 	h.PostApplyFn = func(n *InstanceInfo, s *InstanceState, e error) (HookAction, error) {
 		actualLock.Lock()
+
 		defer actualLock.Unlock()
-		actual = append(actual, n.Id)
+		actual = append(actual, s.String())
 		return HookActionContinue, nil
 	}
 
@@ -1034,7 +1035,11 @@ func TestContext2Apply_createBeforeDestroy_hook(t *testing.T) {
 		t.Fatalf("apply errors: %s", diags.Err())
 	}
 
-	expected := []string{"aws_instance.bar", "aws_instance.bar (deposed #0)"}
+	expected := []string{
+		"ID = foo\nrequire_new = xyz\ntype = aws_instance\nTainted = false\n",
+		"<not created>",
+	}
+
 	if !reflect.DeepEqual(actual, expected) {
 		t.Fatalf("bad: %#v", actual)
 	}

terraform/state.go

@@ -1770,13 +1770,19 @@ func (s *InstanceState) MergeDiff(d *InstanceDiff) *InstanceState {
 }
 
 func (s *InstanceState) String() string {
+	notCreated := "<not created>"
+
+	if s == nil {
+		return notCreated
+	}
+
 	s.Lock()
 	defer s.Unlock()
 
 	var buf bytes.Buffer
 
-	if s == nil || s.ID == "" {
+	if s.ID == "" {
-		return "<not created>"
+		return notCreated
 	}
 
 	buf.WriteString(fmt.Sprintf("ID = %s\n", s.ID))