Isolate tests by running AtExit callbacks between them.

base/at_exit_unittest.cc

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/at_exit.h"
 
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace {
 
-// Don't test the global AtExitManager, because asking it to process its
-// AtExit callbacks can ruin the global state that other tests may depend on.
-class ShadowingAtExitManager : public base::AtExitManager {
- public:
-  ShadowingAtExitManager() : AtExitManager(true) {}
-};
-
 int g_test_counter_1 = 0;
 int g_test_counter_2 = 0;
 
 void IncrementTestCounter1(void* unused) {
   ++g_test_counter_1;
 }
 
 void IncrementTestCounter2(void* unused) {
   ++g_test_counter_2;
 }
@@ skipping 10 matching lines @@
 void ExpectParamIsNull(void* param) {
   EXPECT_EQ(static_cast<void*>(NULL), param);
 }
 
 void ExpectParamIsCounter(void* param) {
   EXPECT_EQ(&g_test_counter_1, param);
 }
 
 }  // namespace
 
-TEST(AtExitTest, Basic) {
-  ShadowingAtExitManager shadowing_at_exit_manager;
+class AtExitTest : public testing::Test {
+ private:
+  // Don't test the global AtExitManager, because asking it to process its
+  // AtExit callbacks can ruin the global state that other tests may depend on.
+  base::ShadowingAtExitManager exit_manager_;
+};
 
+TEST_F(AtExitTest, Basic) {
   ZeroTestCounters();
   base::AtExitManager::RegisterCallback(&IncrementTestCounter1, NULL);
   base::AtExitManager::RegisterCallback(&IncrementTestCounter2, NULL);
   base::AtExitManager::RegisterCallback(&IncrementTestCounter1, NULL);
 
   EXPECT_EQ(0, g_test_counter_1);
   EXPECT_EQ(0, g_test_counter_2);
   base::AtExitManager::ProcessCallbacksNow();
   EXPECT_EQ(2, g_test_counter_1);
   EXPECT_EQ(1, g_test_counter_2);
 }
 
-TEST(AtExitTest, LIFOOrder) {
-  ShadowingAtExitManager shadowing_at_exit_manager;
-
+TEST_F(AtExitTest, LIFOOrder) {
   ZeroTestCounters();
   base::AtExitManager::RegisterCallback(&IncrementTestCounter1, NULL);
   base::AtExitManager::RegisterCallback(&ExpectCounter1IsZero, NULL);
   base::AtExitManager::RegisterCallback(&IncrementTestCounter2, NULL);
 
   EXPECT_EQ(0, g_test_counter_1);
   EXPECT_EQ(0, g_test_counter_2);
   base::AtExitManager::ProcessCallbacksNow();
   EXPECT_EQ(1, g_test_counter_1);
   EXPECT_EQ(1, g_test_counter_2);
 }
 
-TEST(AtExitTest, Param) {
-  ShadowingAtExitManager shadowing_at_exit_manager;
-
+TEST_F(AtExitTest, Param) {
   base::AtExitManager::RegisterCallback(&ExpectParamIsNull, NULL);
   base::AtExitManager::RegisterCallback(&ExpectParamIsCounter,
                                         &g_test_counter_1);
   base::AtExitManager::ProcessCallbacksNow();
 }