src/ppapi/shared_impl/resource_tracker_unittest.cc

   1 // Copyright (c) 2012 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 "testing/gtest/include/gtest/gtest.h"
   6
   7 #include "base/compiler_specific.h"
   8 #include "ppapi/shared_impl/proxy_lock.h"
   9 #include "ppapi/shared_impl/resource.h"
  10 #include "ppapi/shared_impl/resource_tracker.h"
  11 #include "ppapi/shared_impl/test_globals.h"
  12
  13 namespace ppapi {
  14
  15 namespace {
  16
  17 int mock_resource_alive_count = 0;
  18 int last_plugin_ref_was_deleted_count = 0;
  19 int instance_was_deleted_count = 0;
  20
  21 class MyMockResource : public Resource {
  22  public:
  23   MyMockResource(PP_Instance instance) : Resource(OBJECT_IS_IMPL, instance) {
  24     mock_resource_alive_count++;
  25   }
  26   virtual ~MyMockResource() { mock_resource_alive_count--; }
  27
  28   virtual void LastPluginRefWasDeleted() override {
  29     last_plugin_ref_was_deleted_count++;
  30   }
  31   virtual void InstanceWasDeleted() override { instance_was_deleted_count++; }
  32 };
  33
  34 }  // namespace
  35
  36 class ResourceTrackerTest : public testing::Test {
  37  public:
  38   ResourceTrackerTest() {}
  39
  40   // Test implementation.
  41   virtual void SetUp() override {
  42     ASSERT_EQ(0, mock_resource_alive_count);
  43     last_plugin_ref_was_deleted_count = 0;
  44     instance_was_deleted_count = 0;
  45   }
  46   virtual void TearDown() override {}
  47
  48   ResourceTracker& resource_tracker() { return *globals_.GetResourceTracker(); }
  49
  50  private:
  51   TestGlobals globals_;
  52 };
  53
  54 // Test that LastPluginRefWasDeleted is called when the last plugin ref was
  55 // deleted but the object lives on.
  56 TEST_F(ResourceTrackerTest, LastPluginRef) {
  57   PP_Instance instance = 0x1234567;
  58   ProxyAutoLock lock;
  59   resource_tracker().DidCreateInstance(instance);
  60
  61   scoped_refptr<MyMockResource> resource(new MyMockResource(instance));
  62   PP_Resource pp_resource = resource->GetReference();
  63   EXPECT_TRUE(resource_tracker().GetResource(pp_resource));
  64
  65   // Releasing it should keep the object (because we have a ref) but fire the
  66   // "last plugin ref" message.
  67   resource_tracker().ReleaseResource(pp_resource);
  68   EXPECT_EQ(1, last_plugin_ref_was_deleted_count);
  69   EXPECT_EQ(1, mock_resource_alive_count);
  70
  71   resource_tracker().DidDeleteInstance(instance);
  72   resource = NULL;
  73   EXPECT_FALSE(resource_tracker().GetResource(pp_resource));
  74 }
  75
  76 // Tests when the plugin is holding a ref to a resource when the instance is
  77 // deleted.
  78 TEST_F(ResourceTrackerTest, InstanceDeletedWithPluginRef) {
  79   // Make a resource with one ref held by the plugin, and delete the instance.
  80   PP_Instance instance = 0x2345678;
  81   ProxyAutoLock lock;
  82   resource_tracker().DidCreateInstance(instance);
  83   MyMockResource* resource = new MyMockResource(instance);
  84   resource->GetReference();
  85   EXPECT_EQ(1, mock_resource_alive_count);
  86   resource_tracker().DidDeleteInstance(instance);
  87
  88   // The resource should have been deleted, and before it was, it should have
  89   // received a "last plugin ref was deleted" notification.
  90   EXPECT_EQ(0, mock_resource_alive_count);
  91   EXPECT_EQ(1, last_plugin_ref_was_deleted_count);
  92   EXPECT_EQ(0, instance_was_deleted_count);
  93 }
  94
  95 // Test when the plugin and the internal implementation (via scoped_refptr) is
  96 // holding a ref to a resource when the instance is deleted.
  97 TEST_F(ResourceTrackerTest, InstanceDeletedWithBothRefed) {
  98   // Create a new instance.
  99   PP_Instance instance = 0x3456789;
 100   ProxyAutoLock lock;
 101
 102   // Make a resource with one ref held by the plugin and one ref held by us
 103   // (outlives the plugin), and delete the instance.
 104   resource_tracker().DidCreateInstance(instance);
 105   scoped_refptr<MyMockResource> resource = new MyMockResource(instance);
 106   resource->GetReference();
 107   EXPECT_EQ(1, mock_resource_alive_count);
 108   resource_tracker().DidDeleteInstance(instance);
 109
 110   // The resource should NOT have been deleted, and it should have received both
 111   // a "last plugin ref was deleted" and a "instance was deleted" notification.
 112   EXPECT_EQ(1, mock_resource_alive_count);
 113   EXPECT_EQ(1, last_plugin_ref_was_deleted_count);
 114   EXPECT_EQ(1, instance_was_deleted_count);
 115   EXPECT_EQ(0, resource->pp_instance());
 116
 117   resource = NULL;
 118   EXPECT_EQ(0, mock_resource_alive_count);
 119 }
 120
 121 }  // namespace ppapi