Add the IndexedDBActiveBlobRegistry, currently unused, to enable future blob

content/browser/indexed_db/indexed_db_active_blob_registry_unittest.cc

Index: content/browser/indexed_db/indexed_db_active_blob_registry_unittest.cc
diff --git a/content/browser/indexed_db/indexed_db_active_blob_registry_unittest.cc b/content/browser/indexed_db/indexed_db_active_blob_registry_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..e3d741e9221c9b7168571c45a4407db1decc0e76
--- /dev/null
+++ b/content/browser/indexed_db/indexed_db_active_blob_registry_unittest.cc
@@ -0,0 +1,270 @@
+// Copyright (c) 2014 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 <set>
+
+#include "base/test/test_simple_task_runner.h"
+#include "content/browser/indexed_db/indexed_db_active_blob_registry.h"
+#include "content/browser/indexed_db/indexed_db_backing_store.h"
+#include "content/browser/indexed_db/indexed_db_factory.h"
+#include "content/browser/indexed_db/indexed_db_fake_backing_store.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace content {
+
+namespace {
+
+class MockIDBFactory : public IndexedDBFactory {
+ public:
+  MockIDBFactory() : IndexedDBFactory(NULL), duplicate_calls_(false) {}
+
+  virtual void ReportOutstandingBlobs(const GURL& origin_url,
+                                      bool blobs_outstanding) OVERRIDE {
+    if (blobs_outstanding) {
+      if (origins_.count(origin_url)) {
+        duplicate_calls_ = true;
+      } else {
+        origins_.insert(origin_url);
+      }
+    } else {
+      if (!origins_.count(origin_url)) {
+        duplicate_calls_ = true;
+      } else {
+        origins_.erase(origin_url);
+      }
+    }
+  }
+
+  bool CheckNoOriginsInUse() const {
+    return !duplicate_calls_ && !origins_.size();
+  }
+  bool CheckSingleOriginInUse(const GURL& origin) const {
+    return !duplicate_calls_ && origins_.size() == 1 && origins_.count(origin);
+  }
+
+ protected:
+  virtual ~MockIDBFactory() {}
+
+ private:
+  std::set<GURL> origins_;
+  bool duplicate_calls_;
+};
+
+class MockIDBBackingStore : public IndexedDBFakeBackingStore {
+ public:
+  MockIDBBackingStore(IndexedDBFactory* factory, base::TaskRunner* task_runner)
+      : IndexedDBFakeBackingStore(factory, task_runner),
+        duplicate_calls_(false) {}
+
+  virtual void ReportBlobUnused(int64 database_id, int64 blob_key) OVERRIDE {
+    unused_blobs_.insert(std::make_pair(database_id, blob_key));
+  }
+
+  typedef std::pair<int64, int64> KeyPair;
+  typedef std::set<KeyPair> KeyPairSet;
+  bool CheckUnusedBlobsEmpty() const {
+    return !duplicate_calls_ && !unused_blobs_.size();
+  }
+  bool CheckSingleUnusedBlob(int64 database_id, int64 blob_key) const {
+    return !duplicate_calls_ && unused_blobs_.size() == 1 &&
+           unused_blobs_.count(std::make_pair(database_id, blob_key));
+  }
+
+  const KeyPairSet& unused_blobs() const { return unused_blobs_; }
+
+ protected:
+  virtual ~MockIDBBackingStore() {}
+
+ private:
+  KeyPairSet unused_blobs_;
+  bool duplicate_calls_;
+};
+
+// Base class for our test fixtures.
+class IndexedDBActiveBlobRegistryTest : public testing::Test {
+ public:
+  IndexedDBActiveBlobRegistryTest()
+      : task_runner_(new base::TestSimpleTaskRunner),
+        factory_(new MockIDBFactory),
+        backing_store_(new MockIDBBackingStore(factory_, task_runner_)),
+        registry_(new IndexedDBActiveBlobRegistry(backing_store_.get())) {}
+
+  void RunUntilIdle() { task_runner_->RunUntilIdle(); }
+  MockIDBFactory* factory() const { return factory_.get(); }
+  MockIDBBackingStore* backing_store() const { return backing_store_.get(); }
+  IndexedDBActiveBlobRegistry* registry() const { return registry_.get(); }
+
+  static const int64 kDatabaseId0 = 7;
+  static const int64 kDatabaseId1 = 12;
+  static const int64 kBlobKey0 = 77;
+  static const int64 kBlobKey1 = 14;
+
+  typedef webkit_blob::ShareableFileReference::FinalReleaseCallback
+      ReleaseCallback;
+
+ private:
+  scoped_refptr<base::TestSimpleTaskRunner> task_runner_;
+  scoped_refptr<MockIDBFactory> factory_;
+  scoped_refptr<MockIDBBackingStore> backing_store_;
+  scoped_ptr<IndexedDBActiveBlobRegistry> registry_;
+
+  DISALLOW_COPY_AND_ASSIGN(IndexedDBActiveBlobRegistryTest);
+};
+
+TEST_F(IndexedDBActiveBlobRegistryTest, DeleteUnused) {
+  EXPECT_TRUE(factory()->CheckNoOriginsInUse());
+  EXPECT_TRUE(backing_store()->CheckUnusedBlobsEmpty());
+
+  EXPECT_FALSE(registry()->MarkDeletedCheckIfUsed(kDatabaseId0, kBlobKey0));
+  RunUntilIdle();
+
+  EXPECT_TRUE(factory()->CheckNoOriginsInUse());
+  EXPECT_TRUE(backing_store()->CheckUnusedBlobsEmpty());
+}
+
+TEST_F(IndexedDBActiveBlobRegistryTest, SimpleUse) {
+  EXPECT_TRUE(factory()->CheckNoOriginsInUse());
+  EXPECT_TRUE(backing_store()->CheckUnusedBlobsEmpty());
+
+  base::Closure add_ref =
+      registry()->GetAddBlobRefCallback(kDatabaseId0, kBlobKey0);
+  ReleaseCallback release =
+      registry()->GetFinalReleaseCallback(kDatabaseId0, kBlobKey0);
+  add_ref.Run();
+  RunUntilIdle();
+
+  EXPECT_TRUE(factory()->CheckSingleOriginInUse(backing_store()->origin_url()));
+  EXPECT_TRUE(backing_store()->CheckUnusedBlobsEmpty());
+
+  release.Run(base::FilePath());
+  RunUntilIdle();
+
+  EXPECT_TRUE(factory()->CheckNoOriginsInUse());
+  EXPECT_TRUE(backing_store()->CheckUnusedBlobsEmpty());
+}
+
+TEST_F(IndexedDBActiveBlobRegistryTest, DeleteWhileInUse) {
+  EXPECT_TRUE(factory()->CheckNoOriginsInUse());
+  EXPECT_TRUE(backing_store()->CheckUnusedBlobsEmpty());
+
+  base::Closure add_ref =
+      registry()->GetAddBlobRefCallback(kDatabaseId0, kBlobKey0);
+  ReleaseCallback release =
+      registry()->GetFinalReleaseCallback(kDatabaseId0, kBlobKey0);
+
+  add_ref.Run();
+  RunUntilIdle();
+
+  EXPECT_TRUE(factory()->CheckSingleOriginInUse(backing_store()->origin_url()));
+  EXPECT_TRUE(backing_store()->CheckUnusedBlobsEmpty());
+
+  EXPECT_TRUE(registry()->MarkDeletedCheckIfUsed(kDatabaseId0, kBlobKey0));
+  RunUntilIdle();
+
+  EXPECT_TRUE(factory()->CheckSingleOriginInUse(backing_store()->origin_url()));
+  EXPECT_TRUE(backing_store()->CheckUnusedBlobsEmpty());
+
+  release.Run(base::FilePath());
+  RunUntilIdle();
+
+  EXPECT_TRUE(factory()->CheckNoOriginsInUse());
+  EXPECT_TRUE(backing_store()->CheckSingleUnusedBlob(kDatabaseId0, kBlobKey0));
+}
+
+TEST_F(IndexedDBActiveBlobRegistryTest, MultipleBlobs) {
+  EXPECT_TRUE(factory()->CheckNoOriginsInUse());
+  EXPECT_TRUE(backing_store()->CheckUnusedBlobsEmpty());
+
+  base::Closure add_ref_00 =
+      registry()->GetAddBlobRefCallback(kDatabaseId0, kBlobKey0);
+  ReleaseCallback release_00 =
+      registry()->GetFinalReleaseCallback(kDatabaseId0, kBlobKey0);
+  base::Closure add_ref_01 =
+      registry()->GetAddBlobRefCallback(kDatabaseId0, kBlobKey1);
+  ReleaseCallback release_01 =
+      registry()->GetFinalReleaseCallback(kDatabaseId0, kBlobKey1);
+  base::Closure add_ref_10 =
+      registry()->GetAddBlobRefCallback(kDatabaseId1, kBlobKey0);
+  ReleaseCallback release_10 =
+      registry()->GetFinalReleaseCallback(kDatabaseId1, kBlobKey0);
+  base::Closure add_ref_11 =
+      registry()->GetAddBlobRefCallback(kDatabaseId1, kBlobKey1);
+  ReleaseCallback release_11 =
+      registry()->GetFinalReleaseCallback(kDatabaseId1, kBlobKey1);
+
+  add_ref_00.Run();
+  add_ref_01.Run();
+  RunUntilIdle();
+
+  EXPECT_TRUE(factory()->CheckSingleOriginInUse(backing_store()->origin_url()));
+  EXPECT_TRUE(backing_store()->CheckUnusedBlobsEmpty());
+
+  release_00.Run(base::FilePath());
+  add_ref_10.Run();
+  add_ref_11.Run();
+  RunUntilIdle();
+
+  EXPECT_TRUE(factory()->CheckSingleOriginInUse(backing_store()->origin_url()));
+  EXPECT_TRUE(backing_store()->CheckUnusedBlobsEmpty());
+
+  EXPECT_TRUE(registry()->MarkDeletedCheckIfUsed(kDatabaseId0, kBlobKey1));
+  RunUntilIdle();
+
+  EXPECT_TRUE(factory()->CheckSingleOriginInUse(backing_store()->origin_url()));
+  EXPECT_TRUE(backing_store()->CheckUnusedBlobsEmpty());
+
+  release_01.Run(base::FilePath());
+  release_11.Run(base::FilePath());
+  RunUntilIdle();
+
+  EXPECT_TRUE(factory()->CheckSingleOriginInUse(backing_store()->origin_url()));
+  EXPECT_TRUE(backing_store()->CheckSingleUnusedBlob(kDatabaseId0, kBlobKey1));
+
+  release_10.Run(base::FilePath());
+  RunUntilIdle();
+
+  EXPECT_TRUE(factory()->CheckNoOriginsInUse());
+  EXPECT_TRUE(backing_store()->CheckSingleUnusedBlob(kDatabaseId0, kBlobKey1));
+}
+
+TEST_F(IndexedDBActiveBlobRegistryTest, ForceShutdown) {
+  EXPECT_TRUE(factory()->CheckNoOriginsInUse());
+  EXPECT_TRUE(backing_store()->CheckUnusedBlobsEmpty());
+
+  base::Closure add_ref_0 =
+      registry()->GetAddBlobRefCallback(kDatabaseId0, kBlobKey0);
+  ReleaseCallback release_0 =
+      registry()->GetFinalReleaseCallback(kDatabaseId0, kBlobKey0);
+  base::Closure add_ref_1 =
+      registry()->GetAddBlobRefCallback(kDatabaseId0, kBlobKey1);
+  ReleaseCallback release_1 =
+      registry()->GetFinalReleaseCallback(kDatabaseId0, kBlobKey1);
+
+  add_ref_0.Run();
+  RunUntilIdle();
+
+  EXPECT_TRUE(factory()->CheckSingleOriginInUse(backing_store()->origin_url()));
+  EXPECT_TRUE(backing_store()->CheckUnusedBlobsEmpty());
+
+  registry()->ForceShutdown();
+
+  add_ref_1.Run();
+  RunUntilIdle();
+
+  // Nothing changes.
+  EXPECT_TRUE(factory()->CheckSingleOriginInUse(backing_store()->origin_url()));
+  EXPECT_TRUE(backing_store()->CheckUnusedBlobsEmpty());
+
+  release_0.Run(base::FilePath());
+  release_1.Run(base::FilePath());
+  RunUntilIdle();
+
+  // Nothing changes.
+  EXPECT_TRUE(factory()->CheckSingleOriginInUse(backing_store()->origin_url()));
+  EXPECT_TRUE(backing_store()->CheckUnusedBlobsEmpty());
+}
+
+}  // namespace
+
+}  // namespace content