base/supports_user_data_unittest.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "base/supports_user_data.h"
   6
   7 #include <vector>
   8
   9 #include "testing/gtest/include/gtest/gtest.h"
  10
  11 namespace base {
  12 namespace {
  13
  14 struct TestSupportsUserData : public SupportsUserData {};
  15
  16 struct UsesItself : public SupportsUserData::Data {
  17   UsesItself(SupportsUserData* supports_user_data, const void* key)
  18       : supports_user_data_(supports_user_data),
  19         key_(key) {
  20   }
  21
  22   ~UsesItself() override {
  23     EXPECT_EQ(NULL, supports_user_data_->GetUserData(key_));
  24   }
  25
  26   SupportsUserData* supports_user_data_;
  27   const void* key_;
  28 };
  29
  30 TEST(SupportsUserDataTest, ClearWorksRecursively) {
  31   TestSupportsUserData supports_user_data;
  32   char key = 0;
  33   supports_user_data.SetUserData(&key,
  34                                  new UsesItself(&supports_user_data, &key));
  35   // Destruction of supports_user_data runs the actual test.
  36 }
  37
  38 }  // namespace
  39 }  // namespace base