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Diffstat (limited to 'pkg/refs/refcounter_test.go')
-rw-r--r--pkg/refs/refcounter_test.go173
1 files changed, 0 insertions, 173 deletions
diff --git a/pkg/refs/refcounter_test.go b/pkg/refs/refcounter_test.go
deleted file mode 100644
index 1ab4a4440..000000000
--- a/pkg/refs/refcounter_test.go
+++ /dev/null
@@ -1,173 +0,0 @@
-// Copyright 2018 The gVisor Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package refs
-
-import (
- "reflect"
- "testing"
-
- "gvisor.dev/gvisor/pkg/sync"
-)
-
-type testCounter struct {
- AtomicRefCount
-
- // mu protects the boolean below.
- mu sync.Mutex
-
- // destroyed indicates whether this was destroyed.
- destroyed bool
-}
-
-func (t *testCounter) DecRef() {
- t.AtomicRefCount.DecRefWithDestructor(t.destroy)
-}
-
-func (t *testCounter) destroy() {
- t.mu.Lock()
- defer t.mu.Unlock()
- t.destroyed = true
-}
-
-func (t *testCounter) IsDestroyed() bool {
- t.mu.Lock()
- defer t.mu.Unlock()
- return t.destroyed
-}
-
-func newTestCounter() *testCounter {
- return &testCounter{destroyed: false}
-}
-
-func TestOneRef(t *testing.T) {
- tc := newTestCounter()
- tc.DecRef()
-
- if !tc.IsDestroyed() {
- t.Errorf("object should have been destroyed")
- }
-}
-
-func TestTwoRefs(t *testing.T) {
- tc := newTestCounter()
- tc.IncRef()
- tc.DecRef()
- tc.DecRef()
-
- if !tc.IsDestroyed() {
- t.Errorf("object should have been destroyed")
- }
-}
-
-func TestMultiRefs(t *testing.T) {
- tc := newTestCounter()
- tc.IncRef()
- tc.DecRef()
-
- tc.IncRef()
- tc.DecRef()
-
- tc.DecRef()
-
- if !tc.IsDestroyed() {
- t.Errorf("object should have been destroyed")
- }
-}
-
-func TestWeakRef(t *testing.T) {
- tc := newTestCounter()
- w := NewWeakRef(tc, nil)
-
- // Try resolving.
- if x := w.Get(); x == nil {
- t.Errorf("weak reference didn't resolve: expected %v, got nil", tc)
- } else {
- x.DecRef()
- }
-
- // Try resolving again.
- if x := w.Get(); x == nil {
- t.Errorf("weak reference didn't resolve: expected %v, got nil", tc)
- } else {
- x.DecRef()
- }
-
- // Shouldn't be destroyed yet. (Can't continue if this fails.)
- if tc.IsDestroyed() {
- t.Fatalf("original object destroyed earlier than expected")
- }
-
- // Drop the original reference.
- tc.DecRef()
-
- // Assert destroyed.
- if !tc.IsDestroyed() {
- t.Errorf("original object not destroyed as expected")
- }
-
- // Shouldn't be anything.
- if x := w.Get(); x != nil {
- t.Errorf("weak reference resolved: expected nil, got %v", x)
- }
-}
-
-func TestWeakRefDrop(t *testing.T) {
- tc := newTestCounter()
- w := NewWeakRef(tc, nil)
- w.Drop()
-
- // Just assert the list is empty.
- if !tc.weakRefs.Empty() {
- t.Errorf("weak reference not dropped")
- }
-
- // Drop the original reference.
- tc.DecRef()
-}
-
-type testWeakRefUser struct {
- weakRefGone func()
-}
-
-func (u *testWeakRefUser) WeakRefGone() {
- u.weakRefGone()
-}
-
-func TestCallback(t *testing.T) {
- called := false
- tc := newTestCounter()
- var w *WeakRef
- w = NewWeakRef(tc, &testWeakRefUser{func() {
- called = true
-
- // Check that the weak ref has been zapped.
- rc := w.obj.Load().(RefCounter)
- if v := reflect.ValueOf(rc); v != reflect.Zero(v.Type()) {
- t.Fatalf("Callback called with non-nil ptr")
- }
-
- // Check that we're not holding the mutex by acquiring and
- // releasing it.
- tc.mu.Lock()
- tc.mu.Unlock()
- }})
-
- // Drop the original reference, this must trigger the callback.
- tc.DecRef()
-
- if !called {
- t.Fatalf("Callback not called")
- }
-}