Pepper quota support

webkit/plugins/ppapi/quota_file_io_unittest.cc

Index: webkit/plugins/ppapi/quota_file_io_unittest.cc
diff --git a/webkit/plugins/ppapi/quota_file_io_unittest.cc b/webkit/plugins/ppapi/quota_file_io_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..89b1a808998424a378b3ca2182a2e15686b9fed1
--- /dev/null
+++ b/webkit/plugins/ppapi/quota_file_io_unittest.cc
@@ -0,0 +1,488 @@
+// Copyright (c) 2011 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 <deque>
+
+#include "base/basictypes.h"
+#include "base/memory/scoped_callback_factory.h"
+#include "base/message_loop.h"
+#include "base/platform_file.h"
+#include "base/scoped_temp_dir.h"
+#include "base/task.h"
+#include "webkit/plugins/ppapi/mock_plugin_delegate.h"
+#include "webkit/plugins/ppapi/ppapi_unittest.h"
+#include "webkit/plugins/ppapi/quota_file_io.h"
+
+using base::MessageLoopProxy;
+using base::PlatformFile;
+using base::PlatformFileError;
+
+namespace webkit {
+namespace ppapi {
+
+namespace {
+class QuotaMockPluginDelegate : public MockPluginDelegate {
+ public:
+  typedef PluginDelegate::AvailableSpaceCallback Callback;
+
+  QuotaMockPluginDelegate()
+      : available_space_(0),
+        will_update_count_(0),
+        file_thread_(MessageLoopProxy::CreateForCurrentThread()),
+        runnable_factory_(ALLOW_THIS_IN_INITIALIZER_LIST(this)) {
+  }
+  virtual ~QuotaMockPluginDelegate() {}
+
+  virtual scoped_refptr<MessageLoopProxy> GetFileThreadMessageLoopProxy() {
+    return file_thread_;
+  }
+
+  virtual void QueryAvailableSpace(
+      const GURL& origin,
+      quota::StorageType type,
+      Callback* callback) OVERRIDE {
+    DCHECK(callback);
+    MessageLoopProxy::CreateForCurrentThread()->PostTask(
+        FROM_HERE, runnable_factory_.NewRunnableMethod(
+            &QuotaMockPluginDelegate::RunAvailableSpaceCallback, callback));
+  }
+
+  virtual void WillUpdateFile(const GURL& file_path) OVERRIDE {
+    file_path_ = file_path;
+    ++will_update_count_;
+  }
+
+  virtual void DidUpdateFile(const GURL& file_path, int64_t delta) OVERRIDE {
+    ASSERT_EQ(file_path_, file_path);
+    ASSERT_GT(will_update_count_, 0);
+    --will_update_count_;
+    available_space_ -= delta;
+  }
+
+  void set_available_space(int64 available) { available_space_ = available; }
+  int64_t available_space() const { return available_space_; }
+
+ private:
+  void RunAvailableSpaceCallback(Callback* callback) {
+    callback->Run(available_space_);
+    delete callback;
+  }
+
+  int64_t available_space_;
+  int will_update_count_;
+  GURL file_path_;
+  scoped_refptr<MessageLoopProxy> file_thread_;
+  ScopedRunnableMethodFactory<QuotaMockPluginDelegate> runnable_factory_;
+};
+}  // namespace
+
+class QuotaFileIOTest : public PpapiUnittest {
+ public:
+  QuotaFileIOTest()
+      : callback_factory_(ALLOW_THIS_IN_INITIALIZER_LIST(this)) {}
+
+  virtual void SetUp() OVERRIDE {
+    PpapiUnittest::SetUp();
+    ASSERT_TRUE(dir_.CreateUniqueTempDir());
+    FilePath path;
+    ASSERT_TRUE(file_util::CreateTemporaryFileInDir(dir_.path(), &path));
+    int file_flags = base::PLATFORM_FILE_OPEN |
+                     base::PLATFORM_FILE_READ |
+                     base::PLATFORM_FILE_WRITE |
+                     base::PLATFORM_FILE_WRITE_ATTRIBUTES;
+    bool created = false;
+    file_ = base::kInvalidPlatformFileValue;
+    PlatformFileError error = base::PLATFORM_FILE_OK;
+    file_ = base::CreatePlatformFile(path, file_flags, &created, &error);
+    ASSERT_EQ(base::PLATFORM_FILE_OK, error);
+    ASSERT_NE(base::kInvalidPlatformFileValue, file_);
+    ASSERT_FALSE(created);
+    quota_file_io_.reset(new QuotaFileIO(
+        instance(), file_, GURL(), PP_FILESYSTEMTYPE_LOCALTEMPORARY));
+  }
+
+  virtual void TearDown() OVERRIDE {
+    quota_file_io_.reset();
+    if (file_ != base::kInvalidPlatformFileValue)
+      base::ClosePlatformFile(file_);
+    PpapiUnittest::TearDown();
+  }
+
+ protected:
+  virtual MockPluginDelegate* NewPluginDelegate() OVERRIDE {
+    return static_cast<MockPluginDelegate*>(new QuotaMockPluginDelegate);
+  }
+
+  void WriteTestBody(bool will_operation) {
+    quota_plugin_delegate()->set_available_space(100);
+    std::string read_buffer;
+
+    // Write 8 bytes at offset 0 (-> length=8).
+    std::string data("12345678");
+    Write(0, data, will_operation);
+    MessageLoop::current()->RunAllPending();
+    ASSERT_EQ(1U, num_results());
+    EXPECT_EQ(static_cast<int>(data.size()), bytes_written().front());
+    EXPECT_EQ(base::PLATFORM_FILE_OK, status().front());
+    EXPECT_EQ(100 - 8, quota_plugin_delegate()->available_space());
+    reset_results();
+
+    if (will_operation) {
+      // WillWrite doesn't actually write.
+      EXPECT_EQ(0, GetPlatformFileSize());
+      // Adjust the actual file size to 'fake' write to proceed testing.
+      SetPlatformFileSize(8);
+    } else {
+      EXPECT_EQ(8, GetPlatformFileSize());
+      ReadPlatformFile(&read_buffer);
+      EXPECT_EQ(data, read_buffer);
+    }
+
+    // Write 5 bytes at offset 5 (-> length=10).
+    data = "55555";
+    Write(5, data, will_operation);
+    MessageLoop::current()->RunAllPending();
+    ASSERT_EQ(1U, num_results());
+    EXPECT_EQ(static_cast<int>(data.size()), bytes_written().front());
+    EXPECT_EQ(base::PLATFORM_FILE_OK, status().front());
+    EXPECT_EQ(100 - 10, quota_plugin_delegate()->available_space());
+    reset_results();
+
+    if (will_operation) {
+      EXPECT_EQ(8, GetPlatformFileSize());
+      SetPlatformFileSize(10);
+    } else {
+      EXPECT_EQ(10, GetPlatformFileSize());
+      ReadPlatformFile(&read_buffer);
+      EXPECT_EQ("1234555555", read_buffer);
+    }
+
+    // Write 7 bytes at offset 8 (-> length=15).
+    data = "9012345";
+    Write(8, data, will_operation);
+    MessageLoop::current()->RunAllPending();
+    ASSERT_EQ(1U, num_results());
+    EXPECT_EQ(static_cast<int>(data.size()), bytes_written().front());
+    EXPECT_EQ(base::PLATFORM_FILE_OK, status().front());
+    EXPECT_EQ(100 - 15, quota_plugin_delegate()->available_space());
+    reset_results();
+
+    if (will_operation) {
+      EXPECT_EQ(10, GetPlatformFileSize());
+      SetPlatformFileSize(15);
+    } else {
+      EXPECT_EQ(15, GetPlatformFileSize());
+      ReadPlatformFile(&read_buffer);
+      EXPECT_EQ("123455559012345", read_buffer);
+    }
+
+    // Write 2 bytes at offset 2 (-> length=15).
+    data = "33";
+    Write(2, data, will_operation);
+    MessageLoop::current()->RunAllPending();
+    ASSERT_EQ(1U, num_results());
+    EXPECT_EQ(static_cast<int>(data.size()), bytes_written().front());
+    EXPECT_EQ(base::PLATFORM_FILE_OK, status().front());
+    EXPECT_EQ(100 - 15, quota_plugin_delegate()->available_space());
+    reset_results();
+
+    if (will_operation) {
+      EXPECT_EQ(15, GetPlatformFileSize());
+    } else {
+      EXPECT_EQ(15, GetPlatformFileSize());
+      ReadPlatformFile(&read_buffer);
+      EXPECT_EQ("123355559012345", read_buffer);
+    }
+
+    // Write 4 bytes at offset 20 (-> length=24).
+    data = "XXXX";
+    Write(20, data, will_operation);
+    MessageLoop::current()->RunAllPending();
+    ASSERT_EQ(1U, num_results());
+    EXPECT_EQ(static_cast<int>(data.size()), bytes_written().front());
+    EXPECT_EQ(base::PLATFORM_FILE_OK, status().front());
+    EXPECT_EQ(100 - 24, quota_plugin_delegate()->available_space());
+    reset_results();
+
+    if (will_operation) {
+      EXPECT_EQ(15, GetPlatformFileSize());
+      SetPlatformFileSize(24);
+    } else {
+      EXPECT_EQ(24, GetPlatformFileSize());
+      ReadPlatformFile(&read_buffer);
+      EXPECT_EQ(std::string("123355559012345\0\0\0\0\0XXXX", 24), read_buffer);
+    }
+
+    quota_plugin_delegate()->set_available_space(5);
+
+    // Quota error case.  Write 7 bytes at offset 23 (-> length is unchanged)
+    data = "ABCDEFG";
+    Write(23, data, will_operation);
+    MessageLoop::current()->RunAllPending();
+    ASSERT_EQ(1U, num_results());
+    EXPECT_EQ(base::PLATFORM_FILE_ERROR_NO_SPACE, status().front());
+    EXPECT_EQ(5, quota_plugin_delegate()->available_space());
+    reset_results();
+
+    // Overlapping write.  Write 6 bytes at offset 2 (-> length is unchanged)
+    data = "ABCDEF";
+    Write(2, data, will_operation);
+    MessageLoop::current()->RunAllPending();
+    ASSERT_EQ(1U, num_results());
+    EXPECT_EQ(static_cast<int>(data.size()), bytes_written().front());
+    EXPECT_EQ(base::PLATFORM_FILE_OK, status().front());
+    EXPECT_EQ(5, quota_plugin_delegate()->available_space());
+    reset_results();
+
+    // Overlapping + extending the file size, but within the quota.
+    // Write 6 bytes at offset 23 (-> length=29).
+    Write(23, data, will_operation);
+    MessageLoop::current()->RunAllPending();
+    ASSERT_EQ(1U, num_results());
+    EXPECT_EQ(static_cast<int>(data.size()), bytes_written().front());
+    EXPECT_EQ(base::PLATFORM_FILE_OK, status().front());
+    EXPECT_EQ(0, quota_plugin_delegate()->available_space());
+    reset_results();
+
+    if (!will_operation) {
+      EXPECT_EQ(29, GetPlatformFileSize());
+      ReadPlatformFile(&read_buffer);
+      EXPECT_EQ(std::string("12ABCDEF9012345\0\0\0\0\0XXXABCDEF", 29),
+                read_buffer);
+    }
+  }
+
+  void SetLengthTestBody(bool will_operation) {
+    quota_plugin_delegate()->set_available_space(100);
+
+    SetLength(0, will_operation);
+    MessageLoop::current()->RunAllPending();
+    ASSERT_EQ(1U, num_results());
+    EXPECT_EQ(base::PLATFORM_FILE_OK, status().front());
+    EXPECT_EQ(0, GetPlatformFileSize());
+    EXPECT_EQ(100, quota_plugin_delegate()->available_space());
+    reset_results();
+
+    SetLength(8, will_operation);
+    MessageLoop::current()->RunAllPending();
+    ASSERT_EQ(1U, num_results());
+    EXPECT_EQ(base::PLATFORM_FILE_OK, status().front());
+    EXPECT_EQ(100 - 8, quota_plugin_delegate()->available_space());
+    reset_results();
+
+    if (will_operation) {
+      EXPECT_EQ(0, GetPlatformFileSize());
+      SetPlatformFileSize(8);
+    } else {
+      EXPECT_EQ(8, GetPlatformFileSize());
+    }
+
+    SetLength(16, will_operation);
+    MessageLoop::current()->RunAllPending();
+    ASSERT_EQ(1U, num_results());
+    EXPECT_EQ(base::PLATFORM_FILE_OK, status().front());
+    EXPECT_EQ(100 - 16, quota_plugin_delegate()->available_space());
+    reset_results();
+
+    if (will_operation) {
+      EXPECT_EQ(8, GetPlatformFileSize());
+      SetPlatformFileSize(16);
+    } else {
+      EXPECT_EQ(16, GetPlatformFileSize());
+    }
+
+    SetLength(4, will_operation);
+    MessageLoop::current()->RunAllPending();
+    ASSERT_EQ(1U, num_results());
+    EXPECT_EQ(base::PLATFORM_FILE_OK, status().front());
+    EXPECT_EQ(100 - 4, quota_plugin_delegate()->available_space());
+    reset_results();
+
+    if (will_operation) {
+      EXPECT_EQ(16, GetPlatformFileSize());
+      SetPlatformFileSize(4);
+    } else {
+      EXPECT_EQ(4, GetPlatformFileSize());
+    }
+
+    SetLength(0, will_operation);
+    MessageLoop::current()->RunAllPending();
+    ASSERT_EQ(1U, num_results());
+    EXPECT_EQ(base::PLATFORM_FILE_OK, status().front());
+    EXPECT_EQ(100, quota_plugin_delegate()->available_space());
+    reset_results();
+
+    if (will_operation) {
+      EXPECT_EQ(4, GetPlatformFileSize());
+      SetPlatformFileSize(0);
+    } else {
+      EXPECT_EQ(0, GetPlatformFileSize());
+    }
+
+    quota_plugin_delegate()->set_available_space(5);
+
+    // Quota error case.
+    SetLength(7, will_operation);
+    MessageLoop::current()->RunAllPending();
+    ASSERT_EQ(1U, num_results());
+    EXPECT_EQ(base::PLATFORM_FILE_ERROR_NO_SPACE, status().front());
+    EXPECT_EQ(5, quota_plugin_delegate()->available_space());
+    reset_results();
+  }
+
+  QuotaMockPluginDelegate* quota_plugin_delegate() {
+    return static_cast<QuotaMockPluginDelegate*>(delegate());
+  }
+
+  void Write(int64_t offset, const std::string& data, bool will_operation) {
+    if (will_operation) {
+      ASSERT_TRUE(quota_file_io_->WillWrite(
+                      offset, data.size(),
+                      callback_factory_.NewCallback(
+                          &QuotaFileIOTest::DidWrite)));
+    } else {
+      ASSERT_TRUE(quota_file_io_->Write(
+                      offset, data.c_str(), data.size(),
+                      callback_factory_.NewCallback(
+                          &QuotaFileIOTest::DidWrite)));
+    }
+  }
+
+  void SetLength(int64_t length, bool will_operation) {
+    if (will_operation) {
+      ASSERT_TRUE(quota_file_io_->WillSetLength(
+                      length,
+                      callback_factory_.NewCallback(
+                          &QuotaFileIOTest::DidSetLength)));
+    } else {
+      ASSERT_TRUE(quota_file_io_->SetLength(
+                      length,
+                      callback_factory_.NewCallback(
+                          &QuotaFileIOTest::DidSetLength)));
+    }
+  }
+
+  void DidWrite(PlatformFileError status, int bytes_written) {
+    status_.push_back(status);
+    bytes_written_.push_back(bytes_written);
+  }
+
+  void DidSetLength(PlatformFileError status) {
+    status_.push_back(status);
+  }
+
+  size_t num_results() const { return status_.size(); }
+  const std::deque<int>& bytes_written() const { return bytes_written_; }
+  const std::deque<PlatformFileError>& status() const { return status_; }
+
+  void reset_results() {
+    bytes_written_.clear();
+    status_.clear();
+  }
+
+  void pop_result() {
+    bytes_written_.pop_front();
+    status_.pop_front();
+  }
+
+  void ReadPlatformFile(std::string* data) {
+    data->clear();
+    char buf[256];
+    int32_t read_offset = 0;
+    for (;;) {
+      int rv = base::ReadPlatformFile(file_, read_offset, buf, sizeof(buf));
+      ASSERT_GE(rv, 0);
+      if (rv == 0)
+        break;
+      read_offset += rv;
+      data->append(buf, rv);
+    }
+  }
+
+  int64_t GetPlatformFileSize() {
+    base::PlatformFileInfo info;
+    EXPECT_TRUE(base::GetPlatformFileInfo(file_, &info));
+    return info.size;
+  }
+
+  void SetPlatformFileSize(int64_t length) {
+    EXPECT_TRUE(base::TruncatePlatformFile(file_, length));
+  }
+
+ private:
+  ScopedTempDir dir_;
+  PlatformFile file_;
+  scoped_ptr<QuotaFileIO> quota_file_io_;
+  std::deque<int> bytes_written_;
+  std::deque<PlatformFileError> status_;
+  base::ScopedCallbackFactory<QuotaFileIOTest> callback_factory_;
+};
+
+TEST_F(QuotaFileIOTest, Write) {
+  WriteTestBody(false);
+}
+
+TEST_F(QuotaFileIOTest, WillWrite) {
+  WriteTestBody(true);
+}
+
+TEST_F(QuotaFileIOTest, SetLength) {
+  SetLengthTestBody(false);
+}
+
+TEST_F(QuotaFileIOTest, WillSetLength) {
+  SetLengthTestBody(true);
+}
+
+TEST_F(QuotaFileIOTest, ParallelWrites) {
+  quota_plugin_delegate()->set_available_space(22);
+  std::string read_buffer;
+
+  const std::string data1[] = {
+    std::string("12345678"),
+    std::string("55555"),
+    std::string("9012345"),
+  };
+  Write(0, data1[0], false);
+  Write(5, data1[1], false);
+  Write(8, data1[2], false);
+  MessageLoop::current()->RunAllPending();
+
+  ASSERT_EQ(ARRAYSIZE_UNSAFE(data1), num_results());
+  for (size_t i = 0; i < ARRAYSIZE_UNSAFE(data1); ++i) {
+    EXPECT_EQ(static_cast<int>(data1[i].size()), bytes_written().front());
+    EXPECT_EQ(base::PLATFORM_FILE_OK, status().front());
+    pop_result();
+  }
+
+  EXPECT_EQ(22 - 15, quota_plugin_delegate()->available_space());
+  EXPECT_EQ(15, GetPlatformFileSize());
+  ReadPlatformFile(&read_buffer);
+  EXPECT_EQ("123455559012345", read_buffer);
+
+  // The second write will fail for quota error.
+  const std::string data2[] = {
+    std::string("33"),
+    std::string("XXXX"),
+  };
+  Write(2, data2[0], false);
+  Write(20, data2[1], false);
+  MessageLoop::current()->RunAllPending();
+
+  ASSERT_EQ(ARRAYSIZE_UNSAFE(data2), num_results());
+  EXPECT_EQ(static_cast<int>(data2[0].size()), bytes_written().front());
+  EXPECT_EQ(base::PLATFORM_FILE_OK, status().front());
+  pop_result();
+  EXPECT_EQ(0, bytes_written().front());
+  EXPECT_EQ(base::PLATFORM_FILE_ERROR_NO_SPACE, status().front());
+  pop_result();
+
+  EXPECT_EQ(22 - 15, quota_plugin_delegate()->available_space());
+  EXPECT_EQ(15, GetPlatformFileSize());
+  ReadPlatformFile(&read_buffer);
+  EXPECT_EQ("123355559012345", read_buffer);
+}
+
+}  // namespace ppapi
+}  // namespace webkit