[BlobAsync] Patch 4: Browser Classes & Logic.

content/browser/blob_storage/blob_async_builder_host_unittest.cc

Index: content/browser/blob_storage/blob_async_builder_host_unittest.cc
diff --git a/content/browser/blob_storage/blob_async_builder_host_unittest.cc b/content/browser/blob_storage/blob_async_builder_host_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..b061d5a7176b4e229ce059a4866b65f4ddb4dad8
--- /dev/null
+++ b/content/browser/blob_storage/blob_async_builder_host_unittest.cc
@@ -0,0 +1,243 @@
+// Copyright 2015 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 "storage/browser/blob/blob_async_builder_host.h"
+
+#include "base/bind.h"
+#include "base/logging.h"
+#include "base/memory/shared_memory.h"
+#include "storage/common/blob_storage/blob_storage_constants.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace storage {
+namespace {
+const std::string kBlobUUID = "blobUUIDYAY";
+const std::string kFakeBlobUUID = "fakeBlob";
+const std::string kBlobType = "blobtypeYAY";
+
+constexpr size_t kTestBlobStorageIPCThresholdBytes = 5;
+constexpr size_t kTestBlobStorageMaxSharedMemoryBytes = 20;
+constexpr uint64_t kTestBlobStorageMaxFileSizeBytes = 100;

[kinuko, 2015/11/19 15:22:25]

constexptr is banned (https://chromium-cpp.appspot.com/#core-blacklist)

[dmurph, 2015/11/19 22:13:39]

Done.

+
+static void PopulateBytes(char* bytes, size_t start_num, size_t length) {

[kinuko, 2015/11/19 15:22:25]

nit: no need for static inside anon namespace

[dmurph, 2015/11/19 22:13:39]

Done.

+  for (size_t i = 0; i < length; i++) {
+    bytes[i] = static_cast<char>(start_num + i);
+  }
+}
+
+static void PopulateBytes(char* bytes, size_t length) {
+  PopulateBytes(bytes, 0, length);
+}
+
+static void AddMemoryItem(size_t length, std::vector<DataElement>* out) {
+  DataElement bytes;
+  bytes.SetToBytesDescription(length);
+  out->push_back(bytes);
+}
+
+static void AddShortcutMemoryItem(size_t length,
+                                  std::vector<DataElement>* out) {
+  DataElement bytes;
+  bytes.SetToAllocatedBytes(length);
+  PopulateBytes(bytes.mutable_bytes(), length);
+  out->push_back(bytes);
+}
+
+static void AddShortcutMemoryItem(size_t length, BlobDataBuilder* out) {
+  DataElement bytes;
+  bytes.SetToAllocatedBytes(length);
+  PopulateBytes(bytes.mutable_bytes(), length);
+  out->AppendData(bytes.bytes(), length);
+}
+
+static void AddBlobItem(std::vector<DataElement>* out) {
+  DataElement blob;
+  blob.SetToBlob(kFakeBlobUUID);
+  out->push_back(blob);
+}
+
+class BlobAsyncBuilderHostTest : public testing::Test {
+ protected:
+  BlobAsyncBuilderHostTest()
+      : matching_builder_(nullptr),
+        done_called_(false),
+        cancel_called_(false),
+        cancel_code_(IPCBlobCreationCancelCode::UNKNOWN),
+        request_called_(false) {}
+  ~BlobAsyncBuilderHostTest() override {}
+
+  void SetUp() override {
+    matching_builder_ = nullptr;
+    done_called_ = false;
+    cancel_called_ = false;
+    cancel_code_ = IPCBlobCreationCancelCode::UNKNOWN;
+    request_called_ = false;
+    requests_.clear();
+    memory_handles_.clear();
+    file_handles_.clear();
+    host_.SetMemoryConstantsForTesting(kTestBlobStorageIPCThresholdBytes,
+                                       kTestBlobStorageMaxSharedMemoryBytes,
+                                       kTestBlobStorageMaxFileSizeBytes);
+  }
+
+  void SetMatchingBuilder(BlobDataBuilder* builder) {
+    matching_builder_ = builder;
+  }
+
+  void CancelCallback(IPCBlobCreationCancelCode code) {
+    cancel_called_ = true;
+    cancel_code_ = code;
+  }
+
+  void DoneCallback(BlobDataBuilder* builder) {
+    ASSERT_TRUE(builder);
+    if (matching_builder_)
+      EXPECT_EQ(*matching_builder_, *builder);
+    done_called_ = true;
+  }
+
+  void RequestMemoryCallback(
+      const std::vector<storage::BlobItemBytesRequest>& requests,
+      const std::vector<base::SharedMemoryHandle>& sms,
+      const std::vector<IPC::PlatformFileForTransit>& pfs) {
+    this->requests_ = requests;
+    memory_handles_ = sms;
+    file_handles_ = pfs;
+    request_called_ = true;
+  }
+
+  void BuildBlobAsync(const std::vector<DataElement>& descriptions,
+                      size_t memory_available) {
+    host_.StartBuildingBlob(
+        kBlobUUID, kBlobType, descriptions, memory_available,
+        base::Bind(&BlobAsyncBuilderHostTest::RequestMemoryCallback,
+                   base::Unretained(this)),
+        base::Bind(&BlobAsyncBuilderHostTest::DoneCallback,
+                   base::Unretained(this)),
+        base::Bind(&BlobAsyncBuilderHostTest::CancelCallback,
+                   base::Unretained(this)));
+  }
+
+  BlobDataBuilder* matching_builder_;
+  BlobAsyncBuilderHost host_;
+  bool done_called_;
+  bool cancel_called_;
+  IPCBlobCreationCancelCode cancel_code_;
+
+  bool request_called_;
+  std::vector<storage::BlobItemBytesRequest> requests_;
+  std::vector<base::SharedMemoryHandle> memory_handles_;
+  std::vector<IPC::PlatformFileForTransit> file_handles_;
+};
+
+TEST_F(BlobAsyncBuilderHostTest, TestShortcut) {
+  std::vector<DataElement> descriptions;
+
+  AddShortcutMemoryItem(10, &descriptions);
+  AddBlobItem(&descriptions);
+  AddShortcutMemoryItem(5000, &descriptions);
+
+  BlobDataBuilder expected(kBlobUUID);
+  expected.set_content_type(kBlobType);
+  AddShortcutMemoryItem(10, &expected);
+  expected.AppendBlob(kFakeBlobUUID);
+  AddShortcutMemoryItem(5000, &expected);
+  SetMatchingBuilder(&expected);
+
+  BuildBlobAsync(descriptions, 5010);
+
+  EXPECT_TRUE(done_called_);
+  EXPECT_FALSE(cancel_called_);
+  EXPECT_FALSE(request_called_);
+  EXPECT_EQ(0u, host_.blob_building_count());
+};
+
+TEST_F(BlobAsyncBuilderHostTest, TestSingleSharedMemRequest) {
+  std::vector<DataElement> descriptions;
+  const size_t kSize = kTestBlobStorageIPCThresholdBytes + 1;
+  AddMemoryItem(kSize, &descriptions);
+
+  BuildBlobAsync(descriptions, kTestBlobStorageIPCThresholdBytes + 1);
+
+  EXPECT_FALSE(done_called_);
+  EXPECT_FALSE(cancel_called_);
+  EXPECT_TRUE(request_called_);
+  EXPECT_EQ(1u, host_.blob_building_count());
+  ASSERT_EQ(1u, requests_.size());
+  request_called_ = false;
+
+  EXPECT_EQ(
+      BlobItemBytesRequest::CreateSharedMemoryRequest(0, 0, 0, kSize, 0, 0),
+      requests_.at(0));
+};
+
+TEST_F(BlobAsyncBuilderHostTest, TestMultipleSharedMemRequests) {
+  std::vector<DataElement> descriptions;
+  const size_t kSize = kTestBlobStorageMaxSharedMemoryBytes + 1;
+  const size_t kFirstBlockByte = 7;
+  const size_t kSecondBlockByte = 19;

[kinuko, 2015/11/19 15:22:25]

Are k{First,Second}BlockByte used as test byte data?  Why we use size_t here?

[dmurph, 2015/11/19 22:13:39]

Whoops, they should be char.

+  AddMemoryItem(kSize, &descriptions);
+
+  BlobDataBuilder expected(kBlobUUID);
+  expected.set_content_type(kBlobType);
+  char* data = new char[kSize];

[kinuko, 2015/11/19 15:22:25]

nit: given that kSize is small we should be able to just stack-allocate this

[dmurph, 2015/11/19 22:13:39]

Done.

+  char lastByte = kSecondBlockByte;
+  memset(data, kFirstBlockByte, kTestBlobStorageMaxSharedMemoryBytes);
+  expected.AppendData(data, kTestBlobStorageMaxSharedMemoryBytes);
+  expected.AppendData(&lastByte, 1);
+  delete[] data;
+  SetMatchingBuilder(&expected);
+
+  BuildBlobAsync(descriptions, kTestBlobStorageMaxSharedMemoryBytes + 1);
+
+  EXPECT_FALSE(done_called_);
+  EXPECT_FALSE(cancel_called_);
+  EXPECT_TRUE(request_called_);
+  EXPECT_EQ(1u, host_.blob_building_count());
+  ASSERT_EQ(1u, requests_.size());
+  request_called_ = false;
+
+  // We need to grab a duplicate handle so we can have two blocks open at the
+  // same time.
+  base::SharedMemoryHandle handle =
+      base::SharedMemory::DuplicateHandle(memory_handles_.at(0));
+  EXPECT_TRUE(base::SharedMemory::IsHandleValid(handle));
+  base::SharedMemory shared_memory(handle, false);
+  EXPECT_TRUE(shared_memory.Map(kTestBlobStorageMaxSharedMemoryBytes));
+
+  EXPECT_EQ(BlobItemBytesRequest::CreateSharedMemoryRequest(
+                0, 0, 0, kTestBlobStorageMaxSharedMemoryBytes, 0, 0),
+            requests_.at(0));
+
+  memset(shared_memory.memory(), kFirstBlockByte,
+         kTestBlobStorageMaxSharedMemoryBytes);
+
+  BlobItemBytesResponse response(0);
+  std::vector<BlobItemBytesResponse> responses = {response};
+  host_.OnMemoryResponses(kBlobUUID, responses);
+
+  EXPECT_FALSE(done_called_);
+  EXPECT_FALSE(cancel_called_);
+  EXPECT_TRUE(request_called_);
+  EXPECT_EQ(1u, host_.blob_building_count());
+  ASSERT_EQ(1u, requests_.size());
+  request_called_ = false;
+
+  EXPECT_EQ(BlobItemBytesRequest::CreateSharedMemoryRequest(
+                1, 0, kTestBlobStorageMaxSharedMemoryBytes, 1, 0, 0),
+            requests_.at(0));
+
+  memset(shared_memory.memory(), kSecondBlockByte, 1);
+
+  response.request_number = 1;
+  responses[0] = response;
+  host_.OnMemoryResponses(kBlobUUID, responses);
+  EXPECT_TRUE(done_called_);
+  EXPECT_FALSE(cancel_called_);
+  EXPECT_FALSE(request_called_);
+  EXPECT_EQ(0u, host_.blob_building_count());
+};
+
+}  // namespace
+}  // namespace storage