net/base/upload_file_element_reader_unittest.cc - chromium/src - Git at Google

 // Copyright 2012 The Chromium Authors
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.

 #include "net/base/upload_file_element_reader.h"

 #include <stdint.h>

 #include <limits>

 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/run_loop.h"
 #include "base/task/single_thread_task_runner.h"
 #include "build/build_config.h"
 #include "net/base/io_buffer.h"
 #include "net/base/net_errors.h"
 #include "net/base/test_completion_callback.h"
 #include "net/test/gtest_util.h"
 #include "net/test/test_with_task_environment.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"

 #if BUILDFLAG(IS_APPLE)
 #include "base/apple/scoped_nsautorelease_pool.h"
 #include "base/memory/stack_allocated.h"
 #endif

 using net::test::IsError;
 using net::test::IsOk;

 namespace net {

 // When the parameter is false, the UploadFileElementReader is passed only a
 // FilePath and needs to open the file itself. When it's true, it's passed an
 // already open base::File.
 class UploadFileElementReaderTest : public testing::TestWithParam<bool>,
                                     public WithTaskEnvironment {
  protected:
   void SetUp() override {
     // Some tests (*.ReadPartially) rely on bytes_.size() being even.
     bytes_.assign({'1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c',
                    'd', 'e', 'f', 'g', 'h', 'i'});

     ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());

     ASSERT_TRUE(
         base::CreateTemporaryFileInDir(temp_dir_.GetPath(), &temp_file_path_));
     ASSERT_TRUE(base::WriteFile(
         temp_file_path_, std::string_view(bytes_.data(), bytes_.size())));

     reader_ =
         CreateReader(0, std::numeric_limits<uint64_t>::max(), base::Time());

     TestCompletionCallback callback;
     ASSERT_THAT(reader_->Init(callback.callback()), IsError(ERR_IO_PENDING));
     EXPECT_THAT(callback.WaitForResult(), IsOk());
     EXPECT_EQ(bytes_.size(), reader_->GetContentLength());
     EXPECT_EQ(bytes_.size(), reader_->BytesRemaining());
     EXPECT_FALSE(reader_->IsInMemory());
   }

   ~UploadFileElementReaderTest() override {
     reader_.reset();
     base::RunLoop().RunUntilIdle();
   }

   // Creates a UploadFileElementReader based on the value of GetParam().
   std::unique_ptr<UploadFileElementReader> CreateReader(
       int64_t offset,
       int64_t length,
       base::Time expected_modification_time) {
     if (GetParam()) {
       return std::make_unique<UploadFileElementReader>(
           base::SingleThreadTaskRunner::GetCurrentDefault().get(),
           temp_file_path_, offset, length, expected_modification_time);
     }

     // The base::File::FLAG_WIN_SHARE_DELETE lets the file be deleted without
     // the test fixture waiting on it to be closed.
     int open_flags = base::File::FLAG_OPEN | base::File::FLAG_READ |
                      base::File::FLAG_WIN_SHARE_DELETE;
 #if BUILDFLAG(IS_WIN)
     // On Windows, file must be opened for asynchronous operation.
     open_flags |= base::File::FLAG_ASYNC;
 #endif  // BUILDFLAG(IS_WIN)

     base::File file(temp_file_path_, open_flags);
     EXPECT_TRUE(file.IsValid());
     return std::make_unique<UploadFileElementReader>(
         base::SingleThreadTaskRunner::GetCurrentDefault().get(),
         std::move(file),
         // Use an incorrect path, to make sure that the file is never re-opened.
         base::FilePath(FILE_PATH_LITERAL("this_should_be_ignored")), offset,
         length, expected_modification_time);
   }

 #if BUILDFLAG(IS_APPLE)
   // May be needed to avoid leaks on the Mac.
   STACK_ALLOCATED_IGNORE("https://crbug.com/1424190")
   base::apple::ScopedNSAutoreleasePool scoped_pool_;
 #endif

   std::vector<char> bytes_;
   std::unique_ptr<UploadElementReader> reader_;
   base::ScopedTempDir temp_dir_;
   base::FilePath temp_file_path_;
 };

 TEST_P(UploadFileElementReaderTest, ReadPartially) {
   const size_t kHalfSize = bytes_.size() / 2;
   ASSERT_EQ(bytes_.size(), kHalfSize * 2);
   std::vector<char> buf(kHalfSize);
   auto wrapped_buffer = base::MakeRefCounted<WrappedIOBuffer>(buf);
   TestCompletionCallback read_callback1;
   ASSERT_EQ(ERR_IO_PENDING,
             reader_->Read(
                 wrapped_buffer.get(), buf.size(), read_callback1.callback()));
   EXPECT_EQ(static_cast<int>(buf.size()), read_callback1.WaitForResult());
   EXPECT_EQ(bytes_.size() - buf.size(), reader_->BytesRemaining());
   EXPECT_EQ(std::vector<char>(bytes_.begin(), bytes_.begin() + kHalfSize), buf);

   TestCompletionCallback read_callback2;
   EXPECT_EQ(ERR_IO_PENDING,
             reader_->Read(
                 wrapped_buffer.get(), buf.size(), read_callback2.callback()));
   EXPECT_EQ(static_cast<int>(buf.size()), read_callback2.WaitForResult());
   EXPECT_EQ(0U, reader_->BytesRemaining());
   EXPECT_EQ(std::vector<char>(bytes_.begin() + kHalfSize, bytes_.end()), buf);
 }

 TEST_P(UploadFileElementReaderTest, ReadAll) {
   std::vector<char> buf(bytes_.size());
   auto wrapped_buffer = base::MakeRefCounted<WrappedIOBuffer>(buf);
   TestCompletionCallback read_callback;
   ASSERT_EQ(ERR_IO_PENDING,
             reader_->Read(
                 wrapped_buffer.get(), buf.size(), read_callback.callback()));
   EXPECT_EQ(static_cast<int>(buf.size()), read_callback.WaitForResult());
   EXPECT_EQ(0U, reader_->BytesRemaining());
   EXPECT_EQ(bytes_, buf);
   // Try to read again.
   EXPECT_EQ(0,
             reader_->Read(
                 wrapped_buffer.get(), buf.size(), read_callback.callback()));
 }

 TEST_P(UploadFileElementReaderTest, ReadTooMuch) {
   const size_t kTooLargeSize = bytes_.size() * 2;
   std::vector<char> buf(kTooLargeSize);
   auto wrapped_buffer = base::MakeRefCounted<WrappedIOBuffer>(buf);
   TestCompletionCallback read_callback;
   ASSERT_EQ(ERR_IO_PENDING,
             reader_->Read(
                 wrapped_buffer.get(), buf.size(), read_callback.callback()));
   EXPECT_EQ(static_cast<int>(bytes_.size()), read_callback.WaitForResult());
   EXPECT_EQ(0U, reader_->BytesRemaining());
   buf.resize(bytes_.size());  // Resize to compare.
   EXPECT_EQ(bytes_, buf);
 }

 TEST_P(UploadFileElementReaderTest, MultipleInit) {
   std::vector<char> buf(bytes_.size());
   auto wrapped_buffer = base::MakeRefCounted<WrappedIOBuffer>(buf);

   // Read all.
   TestCompletionCallback read_callback1;
   ASSERT_EQ(ERR_IO_PENDING,
             reader_->Read(
                 wrapped_buffer.get(), buf.size(), read_callback1.callback()));
   EXPECT_EQ(static_cast<int>(buf.size()), read_callback1.WaitForResult());
   EXPECT_EQ(0U, reader_->BytesRemaining());
   EXPECT_EQ(bytes_, buf);

   // Call Init() again to reset the state.
   TestCompletionCallback init_callback;
   ASSERT_THAT(reader_->Init(init_callback.callback()), IsError(ERR_IO_PENDING));
   EXPECT_THAT(init_callback.WaitForResult(), IsOk());
   EXPECT_EQ(bytes_.size(), reader_->GetContentLength());
   EXPECT_EQ(bytes_.size(), reader_->BytesRemaining());

   // Read again.
   TestCompletionCallback read_callback2;
   ASSERT_EQ(ERR_IO_PENDING,
             reader_->Read(
                 wrapped_buffer.get(), buf.size(), read_callback2.callback()));
   EXPECT_EQ(static_cast<int>(buf.size()), read_callback2.WaitForResult());
   EXPECT_EQ(0U, reader_->BytesRemaining());
   EXPECT_EQ(bytes_, buf);
 }

 TEST_P(UploadFileElementReaderTest, InitDuringAsyncOperation) {
   std::vector<char> buf(bytes_.size());
   auto wrapped_buffer = base::MakeRefCounted<WrappedIOBuffer>(buf);

   // Start reading all.
   TestCompletionCallback read_callback1;
   EXPECT_EQ(ERR_IO_PENDING,
             reader_->Read(
                 wrapped_buffer.get(), buf.size(), read_callback1.callback()));

   // Call Init to cancel the previous read.
   TestCompletionCallback init_callback1;
   EXPECT_THAT(reader_->Init(init_callback1.callback()),
               IsError(ERR_IO_PENDING));

   // Call Init again to cancel the previous init.
   TestCompletionCallback init_callback2;
   EXPECT_THAT(reader_->Init(init_callback2.callback()),
               IsError(ERR_IO_PENDING));
   EXPECT_THAT(init_callback2.WaitForResult(), IsOk());
   EXPECT_EQ(bytes_.size(), reader_->GetContentLength());
   EXPECT_EQ(bytes_.size(), reader_->BytesRemaining());

   // Read half.
   std::vector<char> buf2(bytes_.size() / 2);
   auto wrapped_buffer2 = base::MakeRefCounted<WrappedIOBuffer>(buf2);
   TestCompletionCallback read_callback2;
   EXPECT_EQ(ERR_IO_PENDING,
             reader_->Read(
                 wrapped_buffer2.get(), buf2.size(), read_callback2.callback()));
   EXPECT_EQ(static_cast<int>(buf2.size()), read_callback2.WaitForResult());
   EXPECT_EQ(bytes_.size() - buf2.size(), reader_->BytesRemaining());
   EXPECT_EQ(std::vector<char>(bytes_.begin(), bytes_.begin() + buf2.size()),
             buf2);

   // Make sure callbacks are not called for cancelled operations.
   EXPECT_FALSE(read_callback1.have_result());
   EXPECT_FALSE(init_callback1.have_result());
 }

 TEST_P(UploadFileElementReaderTest, RepeatedInitDuringInit) {
   std::vector<char> buf(bytes_.size());
   auto wrapped_buffer = base::MakeRefCounted<WrappedIOBuffer>(buf);

   TestCompletionCallback init_callback1;
   EXPECT_THAT(reader_->Init(init_callback1.callback()),
               IsError(ERR_IO_PENDING));

   // Call Init again to cancel the previous init.
   TestCompletionCallback init_callback2;
   EXPECT_THAT(reader_->Init(init_callback2.callback()),
               IsError(ERR_IO_PENDING));

   // Call Init yet again to cancel the previous init.
   TestCompletionCallback init_callback3;
   EXPECT_THAT(reader_->Init(init_callback3.callback()),
               IsError(ERR_IO_PENDING));

   EXPECT_THAT(init_callback3.WaitForResult(), IsOk());
   EXPECT_EQ(bytes_.size(), reader_->GetContentLength());
   EXPECT_EQ(bytes_.size(), reader_->BytesRemaining());

   // Read all.
   TestCompletionCallback read_callback;
   int result =
       reader_->Read(wrapped_buffer.get(), buf.size(), read_callback.callback());
   EXPECT_EQ(static_cast<int>(buf.size()), read_callback.GetResult(result));
   EXPECT_EQ(0U, reader_->BytesRemaining());
   EXPECT_EQ(bytes_, buf);

   EXPECT_FALSE(init_callback1.have_result());
   EXPECT_FALSE(init_callback2.have_result());
 }

 TEST_P(UploadFileElementReaderTest, Range) {
   const uint64_t kOffset = 2;
   const uint64_t kLength = bytes_.size() - kOffset * 3;
   reader_ = CreateReader(kOffset, kLength, base::Time());
   TestCompletionCallback init_callback;
   ASSERT_THAT(reader_->Init(init_callback.callback()), IsError(ERR_IO_PENDING));
   EXPECT_THAT(init_callback.WaitForResult(), IsOk());
   EXPECT_EQ(kLength, reader_->GetContentLength());
   EXPECT_EQ(kLength, reader_->BytesRemaining());
   std::vector<char> buf(kLength);
   auto wrapped_buffer = base::MakeRefCounted<WrappedIOBuffer>(buf);
   TestCompletionCallback read_callback;
   ASSERT_EQ(
       ERR_IO_PENDING,
       reader_->Read(wrapped_buffer.get(), kLength, read_callback.callback()));
   EXPECT_EQ(static_cast<int>(kLength), read_callback.WaitForResult());
   const std::vector<char> expected(bytes_.begin() + kOffset,
                                    bytes_.begin() + kOffset + kLength);
   EXPECT_EQ(expected, buf);
 }

 TEST_P(UploadFileElementReaderTest, FileChanged) {
   base::File::Info info;
   ASSERT_TRUE(base::GetFileInfo(temp_file_path_, &info));

   // Expect one second before the actual modification time to simulate change.
   const base::Time expected_modification_time =
       info.last_modified - base::Seconds(1);
   reader_ = CreateReader(0, std::numeric_limits<uint64_t>::max(),
                          expected_modification_time);
   TestCompletionCallback init_callback;
   ASSERT_THAT(reader_->Init(init_callback.callback()), IsError(ERR_IO_PENDING));
   EXPECT_THAT(init_callback.WaitForResult(), IsError(ERR_UPLOAD_FILE_CHANGED));
 }

 TEST_P(UploadFileElementReaderTest, InexactExpectedTimeStamp) {
   base::File::Info info;
   ASSERT_TRUE(base::GetFileInfo(temp_file_path_, &info));

   const base::Time expected_modification_time =
       info.last_modified - base::Milliseconds(900);
   reader_ = CreateReader(0, std::numeric_limits<uint64_t>::max(),
                          expected_modification_time);
   TestCompletionCallback init_callback;
   ASSERT_THAT(reader_->Init(init_callback.callback()), IsError(ERR_IO_PENDING));
   EXPECT_THAT(init_callback.WaitForResult(), IsOk());
 }

 TEST_P(UploadFileElementReaderTest, WrongPath) {
   const base::FilePath wrong_path(FILE_PATH_LITERAL("wrong_path"));
   reader_ = std::make_unique<UploadFileElementReader>(
       base::SingleThreadTaskRunner::GetCurrentDefault().get(), wrong_path, 0,
       std::numeric_limits<uint64_t>::max(), base::Time());
   TestCompletionCallback init_callback;
   ASSERT_THAT(reader_->Init(init_callback.callback()), IsError(ERR_IO_PENDING));
   EXPECT_THAT(init_callback.WaitForResult(), IsError(ERR_FILE_NOT_FOUND));
 }

 INSTANTIATE_TEST_SUITE_P(All,
                          UploadFileElementReaderTest,
                          testing::ValuesIn({false, true}));

 }  // namespace net
	// Copyright 2012 The Chromium Authors
	// Use of this source code is governed by a BSD-style license that can be
	// found in the LICENSE file.

	#include "net/base/upload_file_element_reader.h"

	#include <stdint.h>

	#include <limits>

	#include "base/files/file_util.h"
	#include "base/files/scoped_temp_dir.h"
	#include "base/run_loop.h"
	#include "base/task/single_thread_task_runner.h"
	#include "build/build_config.h"
	#include "net/base/io_buffer.h"
	#include "net/base/net_errors.h"
	#include "net/base/test_completion_callback.h"
	#include "net/test/gtest_util.h"
	#include "net/test/test_with_task_environment.h"
	#include "testing/gmock/include/gmock/gmock.h"
	#include "testing/gtest/include/gtest/gtest.h"

	#if BUILDFLAG(IS_APPLE)
	#include "base/apple/scoped_nsautorelease_pool.h"
	#include "base/memory/stack_allocated.h"
	#endif

	using net::test::IsError;
	using net::test::IsOk;

	namespace net {

	// When the parameter is false, the UploadFileElementReader is passed only a
	// FilePath and needs to open the file itself. When it's true, it's passed an
	// already open base::File.
	class UploadFileElementReaderTest : public testing::TestWithParam<bool>,
	public WithTaskEnvironment {
	protected:
	void SetUp() override {
	// Some tests (*.ReadPartially) rely on bytes_.size() being even.
	bytes_.assign({'1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c',
	'd', 'e', 'f', 'g', 'h', 'i'});

	ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());

	ASSERT_TRUE(
	base::CreateTemporaryFileInDir(temp_dir_.GetPath(), &temp_file_path_));
	ASSERT_TRUE(base::WriteFile(
	temp_file_path_, std::string_view(bytes_.data(), bytes_.size())));

	reader_ =
	CreateReader(0, std::numeric_limits<uint64_t>::max(), base::Time());

	TestCompletionCallback callback;
	ASSERT_THAT(reader_->Init(callback.callback()), IsError(ERR_IO_PENDING));
	EXPECT_THAT(callback.WaitForResult(), IsOk());
	EXPECT_EQ(bytes_.size(), reader_->GetContentLength());
	EXPECT_EQ(bytes_.size(), reader_->BytesRemaining());
	EXPECT_FALSE(reader_->IsInMemory());
	}

	~UploadFileElementReaderTest() override {
	reader_.reset();
	base::RunLoop().RunUntilIdle();
	}

	// Creates a UploadFileElementReader based on the value of GetParam().
	std::unique_ptr<UploadFileElementReader> CreateReader(
	int64_t offset,
	int64_t length,
	base::Time expected_modification_time) {
	if (GetParam()) {
	return std::make_unique<UploadFileElementReader>(
	base::SingleThreadTaskRunner::GetCurrentDefault().get(),
	temp_file_path_, offset, length, expected_modification_time);
	}

	// The base::File::FLAG_WIN_SHARE_DELETE lets the file be deleted without
	// the test fixture waiting on it to be closed.
	int open_flags = base::File::FLAG_OPEN \| base::File::FLAG_READ \|
	base::File::FLAG_WIN_SHARE_DELETE;
	#if BUILDFLAG(IS_WIN)
	// On Windows, file must be opened for asynchronous operation.
	open_flags \|= base::File::FLAG_ASYNC;
	#endif // BUILDFLAG(IS_WIN)

	base::File file(temp_file_path_, open_flags);
	EXPECT_TRUE(file.IsValid());
	return std::make_unique<UploadFileElementReader>(
	base::SingleThreadTaskRunner::GetCurrentDefault().get(),
	std::move(file),
	// Use an incorrect path, to make sure that the file is never re-opened.
	base::FilePath(FILE_PATH_LITERAL("this_should_be_ignored")), offset,
	length, expected_modification_time);
	}

	#if BUILDFLAG(IS_APPLE)
	// May be needed to avoid leaks on the Mac.
	STACK_ALLOCATED_IGNORE("https://crbug.com/1424190")
	base::apple::ScopedNSAutoreleasePool scoped_pool_;
	#endif

	std::vector<char> bytes_;
	std::unique_ptr<UploadElementReader> reader_;
	base::ScopedTempDir temp_dir_;
	base::FilePath temp_file_path_;
	};

	TEST_P(UploadFileElementReaderTest, ReadPartially) {
	const size_t kHalfSize = bytes_.size() / 2;
	ASSERT_EQ(bytes_.size(), kHalfSize * 2);
	std::vector<char> buf(kHalfSize);
	auto wrapped_buffer = base::MakeRefCounted<WrappedIOBuffer>(buf);
	TestCompletionCallback read_callback1;
	ASSERT_EQ(ERR_IO_PENDING,
	reader_->Read(
	wrapped_buffer.get(), buf.size(), read_callback1.callback()));
	EXPECT_EQ(static_cast<int>(buf.size()), read_callback1.WaitForResult());
	EXPECT_EQ(bytes_.size() - buf.size(), reader_->BytesRemaining());
	EXPECT_EQ(std::vector<char>(bytes_.begin(), bytes_.begin() + kHalfSize), buf);

	TestCompletionCallback read_callback2;
	EXPECT_EQ(ERR_IO_PENDING,
	reader_->Read(
	wrapped_buffer.get(), buf.size(), read_callback2.callback()));
	EXPECT_EQ(static_cast<int>(buf.size()), read_callback2.WaitForResult());
	EXPECT_EQ(0U, reader_->BytesRemaining());
	EXPECT_EQ(std::vector<char>(bytes_.begin() + kHalfSize, bytes_.end()), buf);
	}

	TEST_P(UploadFileElementReaderTest, ReadAll) {
	std::vector<char> buf(bytes_.size());
	auto wrapped_buffer = base::MakeRefCounted<WrappedIOBuffer>(buf);
	TestCompletionCallback read_callback;
	ASSERT_EQ(ERR_IO_PENDING,
	reader_->Read(
	wrapped_buffer.get(), buf.size(), read_callback.callback()));
	EXPECT_EQ(static_cast<int>(buf.size()), read_callback.WaitForResult());
	EXPECT_EQ(0U, reader_->BytesRemaining());
	EXPECT_EQ(bytes_, buf);
	// Try to read again.
	EXPECT_EQ(0,
	reader_->Read(
	wrapped_buffer.get(), buf.size(), read_callback.callback()));
	}

	TEST_P(UploadFileElementReaderTest, ReadTooMuch) {
	const size_t kTooLargeSize = bytes_.size() * 2;
	std::vector<char> buf(kTooLargeSize);
	auto wrapped_buffer = base::MakeRefCounted<WrappedIOBuffer>(buf);
	TestCompletionCallback read_callback;
	ASSERT_EQ(ERR_IO_PENDING,
	reader_->Read(
	wrapped_buffer.get(), buf.size(), read_callback.callback()));
	EXPECT_EQ(static_cast<int>(bytes_.size()), read_callback.WaitForResult());
	EXPECT_EQ(0U, reader_->BytesRemaining());
	buf.resize(bytes_.size()); // Resize to compare.
	EXPECT_EQ(bytes_, buf);
	}

	TEST_P(UploadFileElementReaderTest, MultipleInit) {
	std::vector<char> buf(bytes_.size());
	auto wrapped_buffer = base::MakeRefCounted<WrappedIOBuffer>(buf);

	// Read all.
	TestCompletionCallback read_callback1;
	ASSERT_EQ(ERR_IO_PENDING,
	reader_->Read(
	wrapped_buffer.get(), buf.size(), read_callback1.callback()));
	EXPECT_EQ(static_cast<int>(buf.size()), read_callback1.WaitForResult());
	EXPECT_EQ(0U, reader_->BytesRemaining());
	EXPECT_EQ(bytes_, buf);

	// Call Init() again to reset the state.
	TestCompletionCallback init_callback;
	ASSERT_THAT(reader_->Init(init_callback.callback()), IsError(ERR_IO_PENDING));
	EXPECT_THAT(init_callback.WaitForResult(), IsOk());
	EXPECT_EQ(bytes_.size(), reader_->GetContentLength());
	EXPECT_EQ(bytes_.size(), reader_->BytesRemaining());

	// Read again.
	TestCompletionCallback read_callback2;
	ASSERT_EQ(ERR_IO_PENDING,
	reader_->Read(
	wrapped_buffer.get(), buf.size(), read_callback2.callback()));
	EXPECT_EQ(static_cast<int>(buf.size()), read_callback2.WaitForResult());
	EXPECT_EQ(0U, reader_->BytesRemaining());
	EXPECT_EQ(bytes_, buf);
	}

	TEST_P(UploadFileElementReaderTest, InitDuringAsyncOperation) {
	std::vector<char> buf(bytes_.size());
	auto wrapped_buffer = base::MakeRefCounted<WrappedIOBuffer>(buf);

	// Start reading all.
	TestCompletionCallback read_callback1;
	EXPECT_EQ(ERR_IO_PENDING,
	reader_->Read(
	wrapped_buffer.get(), buf.size(), read_callback1.callback()));

	// Call Init to cancel the previous read.
	TestCompletionCallback init_callback1;
	EXPECT_THAT(reader_->Init(init_callback1.callback()),
	IsError(ERR_IO_PENDING));

	// Call Init again to cancel the previous init.
	TestCompletionCallback init_callback2;
	EXPECT_THAT(reader_->Init(init_callback2.callback()),
	IsError(ERR_IO_PENDING));
	EXPECT_THAT(init_callback2.WaitForResult(), IsOk());
	EXPECT_EQ(bytes_.size(), reader_->GetContentLength());
	EXPECT_EQ(bytes_.size(), reader_->BytesRemaining());

	// Read half.
	std::vector<char> buf2(bytes_.size() / 2);
	auto wrapped_buffer2 = base::MakeRefCounted<WrappedIOBuffer>(buf2);
	TestCompletionCallback read_callback2;
	EXPECT_EQ(ERR_IO_PENDING,
	reader_->Read(
	wrapped_buffer2.get(), buf2.size(), read_callback2.callback()));
	EXPECT_EQ(static_cast<int>(buf2.size()), read_callback2.WaitForResult());
	EXPECT_EQ(bytes_.size() - buf2.size(), reader_->BytesRemaining());
	EXPECT_EQ(std::vector<char>(bytes_.begin(), bytes_.begin() + buf2.size()),
	buf2);

	// Make sure callbacks are not called for cancelled operations.
	EXPECT_FALSE(read_callback1.have_result());
	EXPECT_FALSE(init_callback1.have_result());
	}

	TEST_P(UploadFileElementReaderTest, RepeatedInitDuringInit) {
	std::vector<char> buf(bytes_.size());
	auto wrapped_buffer = base::MakeRefCounted<WrappedIOBuffer>(buf);

	TestCompletionCallback init_callback1;
	EXPECT_THAT(reader_->Init(init_callback1.callback()),
	IsError(ERR_IO_PENDING));

	// Call Init again to cancel the previous init.
	TestCompletionCallback init_callback2;
	EXPECT_THAT(reader_->Init(init_callback2.callback()),
	IsError(ERR_IO_PENDING));

	// Call Init yet again to cancel the previous init.
	TestCompletionCallback init_callback3;
	EXPECT_THAT(reader_->Init(init_callback3.callback()),
	IsError(ERR_IO_PENDING));

	EXPECT_THAT(init_callback3.WaitForResult(), IsOk());
	EXPECT_EQ(bytes_.size(), reader_->GetContentLength());
	EXPECT_EQ(bytes_.size(), reader_->BytesRemaining());

	// Read all.
	TestCompletionCallback read_callback;
	int result =
	reader_->Read(wrapped_buffer.get(), buf.size(), read_callback.callback());
	EXPECT_EQ(static_cast<int>(buf.size()), read_callback.GetResult(result));
	EXPECT_EQ(0U, reader_->BytesRemaining());
	EXPECT_EQ(bytes_, buf);

	EXPECT_FALSE(init_callback1.have_result());
	EXPECT_FALSE(init_callback2.have_result());
	}

	TEST_P(UploadFileElementReaderTest, Range) {
	const uint64_t kOffset = 2;
	const uint64_t kLength = bytes_.size() - kOffset * 3;
	reader_ = CreateReader(kOffset, kLength, base::Time());
	TestCompletionCallback init_callback;
	ASSERT_THAT(reader_->Init(init_callback.callback()), IsError(ERR_IO_PENDING));
	EXPECT_THAT(init_callback.WaitForResult(), IsOk());
	EXPECT_EQ(kLength, reader_->GetContentLength());
	EXPECT_EQ(kLength, reader_->BytesRemaining());
	std::vector<char> buf(kLength);
	auto wrapped_buffer = base::MakeRefCounted<WrappedIOBuffer>(buf);
	TestCompletionCallback read_callback;
	ASSERT_EQ(
	ERR_IO_PENDING,
	reader_->Read(wrapped_buffer.get(), kLength, read_callback.callback()));
	EXPECT_EQ(static_cast<int>(kLength), read_callback.WaitForResult());
	const std::vector<char> expected(bytes_.begin() + kOffset,
	bytes_.begin() + kOffset + kLength);
	EXPECT_EQ(expected, buf);
	}

	TEST_P(UploadFileElementReaderTest, FileChanged) {
	base::File::Info info;
	ASSERT_TRUE(base::GetFileInfo(temp_file_path_, &info));

	// Expect one second before the actual modification time to simulate change.
	const base::Time expected_modification_time =
	info.last_modified - base::Seconds(1);
	reader_ = CreateReader(0, std::numeric_limits<uint64_t>::max(),
	expected_modification_time);
	TestCompletionCallback init_callback;
	ASSERT_THAT(reader_->Init(init_callback.callback()), IsError(ERR_IO_PENDING));
	EXPECT_THAT(init_callback.WaitForResult(), IsError(ERR_UPLOAD_FILE_CHANGED));
	}

	TEST_P(UploadFileElementReaderTest, InexactExpectedTimeStamp) {
	base::File::Info info;
	ASSERT_TRUE(base::GetFileInfo(temp_file_path_, &info));

	const base::Time expected_modification_time =
	info.last_modified - base::Milliseconds(900);
	reader_ = CreateReader(0, std::numeric_limits<uint64_t>::max(),
	expected_modification_time);
	TestCompletionCallback init_callback;
	ASSERT_THAT(reader_->Init(init_callback.callback()), IsError(ERR_IO_PENDING));
	EXPECT_THAT(init_callback.WaitForResult(), IsOk());
	}

	TEST_P(UploadFileElementReaderTest, WrongPath) {
	const base::FilePath wrong_path(FILE_PATH_LITERAL("wrong_path"));
	reader_ = std::make_unique<UploadFileElementReader>(
	base::SingleThreadTaskRunner::GetCurrentDefault().get(), wrong_path, 0,
	std::numeric_limits<uint64_t>::max(), base::Time());
	TestCompletionCallback init_callback;
	ASSERT_THAT(reader_->Init(init_callback.callback()), IsError(ERR_IO_PENDING));
	EXPECT_THAT(init_callback.WaitForResult(), IsError(ERR_FILE_NOT_FOUND));
	}

	INSTANTIATE_TEST_SUITE_P(All,
	UploadFileElementReaderTest,
	testing::ValuesIn({false, true}));

	} // namespace net