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// Copyright 2017 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 "services/network/data_pipe_element_reader.h"
#include <stdint.h>
#include <limits>
#include <memory>
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/run_loop.h"
#include "base/strings/string_number_conversions.h"
#include "base/test/task_environment.h"
#include "mojo/public/cpp/bindings/pending_remote.h"
#include "mojo/public/cpp/bindings/receiver.h"
#include "mojo/public/cpp/system/data_pipe.h"
#include "mojo/public/cpp/system/data_pipe_utils.h"
#include "net/base/io_buffer.h"
#include "net/base/test_completion_callback.h"
#include "services/network/public/mojom/data_pipe_getter.mojom.h"
#include "testing/gtest/include/gtest/gtest.h"
// Most tests of this class are at the URLLoader layer. These tests focus on
// things too difficult to cover with integration tests.
namespace network {
namespace {
class PassThroughDataPipeGetter : public mojom::DataPipeGetter {
public:
explicit PassThroughDataPipeGetter() = default;
mojo::PendingRemote<network::mojom::DataPipeGetter>
GetDataPipeGetterRemote() {
EXPECT_FALSE(receiver_.is_bound());
return receiver_.BindNewPipeAndPassRemote();
}
void WaitForRead(mojo::ScopedDataPipeProducerHandle* write_pipe,
ReadCallback* read_callback) {
DCHECK(!run_loop_);
if (!write_pipe_.is_valid()) {
run_loop_ = std::make_unique<base::RunLoop>();
run_loop_->Run();
run_loop_.reset();
}
EXPECT_TRUE(write_pipe_.is_valid());
EXPECT_TRUE(read_callback_);
*write_pipe = std::move(write_pipe_);
*read_callback = std::move(read_callback_);
}
private:
// network::mojom::DataPipeGetter implementation:
void Read(mojo::ScopedDataPipeProducerHandle pipe,
ReadCallback callback) override {
EXPECT_FALSE(write_pipe_.is_valid());
EXPECT_FALSE(read_callback_);
write_pipe_ = std::move(pipe);
read_callback_ = std::move(callback);
if (run_loop_)
run_loop_->Quit();
}
void Clone(
mojo::PendingReceiver<network::mojom::DataPipeGetter> receiver) override {
NOTIMPLEMENTED();
}
std::unique_ptr<base::RunLoop> run_loop_;
mojo::Receiver<network::mojom::DataPipeGetter> receiver_{this};
mojo::ScopedDataPipeProducerHandle write_pipe_;
ReadCallback read_callback_;
DISALLOW_COPY_AND_ASSIGN(PassThroughDataPipeGetter);
};
class DataPipeElementReaderTest : public testing::Test {
public:
DataPipeElementReaderTest()
: element_reader_(nullptr, data_pipe_getter_.GetDataPipeGetterRemote()) {}
protected:
base::test::SingleThreadTaskEnvironment task_environment_{
base::test::SingleThreadTaskEnvironment::MainThreadType::IO};
PassThroughDataPipeGetter data_pipe_getter_;
DataPipeElementReader element_reader_;
};
// Test the case where a second Init() call occurs when there's a pending Init()
// call in progress. The first call should be dropped, in favor of the second
// one.
TEST_F(DataPipeElementReaderTest, InitInterruptsInit) {
// Value deliberately outside of the range of an uint32_t, to catch any
// accidental conversions to an int.
const uint64_t kResponseBodySize = std::numeric_limits<uint32_t>::max();
// The network stack calls Init.
net::TestCompletionCallback first_init_callback;
EXPECT_EQ(net::ERR_IO_PENDING,
element_reader_.Init(first_init_callback.callback()));
// Wait for DataPipeGetter::Read() to be called.
mojo::ScopedDataPipeProducerHandle first_write_pipe;
network::mojom::DataPipeGetter::ReadCallback first_read_pipe_callback;
data_pipe_getter_.WaitForRead(&first_write_pipe, &first_read_pipe_callback);
// The network stack calls Init again, interrupting the previous call.
net::TestCompletionCallback second_init_callback;
EXPECT_EQ(net::ERR_IO_PENDING,
element_reader_.Init(second_init_callback.callback()));
// Wait for DataPipeGetter::Read() to be called again.
mojo::ScopedDataPipeProducerHandle second_write_pipe;
network::mojom::DataPipeGetter::ReadCallback second_read_pipe_callback;
data_pipe_getter_.WaitForRead(&second_write_pipe, &second_read_pipe_callback);
// Sending data on the first read pipe should do nothing.
std::move(first_read_pipe_callback)
.Run(net::ERR_FAILED, kResponseBodySize - 1);
// Run any pending tasks, to make sure nothing unexpected is queued.
base::RunLoop().RunUntilIdle();
EXPECT_FALSE(first_init_callback.have_result());
EXPECT_FALSE(second_init_callback.have_result());
// Sending data on the second pipe should result in the second init callback
// being invoked.
std::move(second_read_pipe_callback).Run(net::OK, kResponseBodySize);
EXPECT_EQ(net::OK, second_init_callback.WaitForResult());
EXPECT_FALSE(first_init_callback.have_result());
EXPECT_EQ(kResponseBodySize, element_reader_.GetContentLength());
EXPECT_EQ(kResponseBodySize, element_reader_.BytesRemaining());
EXPECT_FALSE(element_reader_.IsInMemory());
// Try to read from the body.
auto io_buffer = base::MakeRefCounted<net::IOBufferWithSize>(10);
net::TestCompletionCallback read_callback;
EXPECT_EQ(net::ERR_IO_PENDING,
element_reader_.Read(io_buffer.get(), io_buffer->size(),
read_callback.callback()));
// Writes to the first write pipe should either fail, or succeed but be
// ignored.
mojo::BlockingCopyFromString("foo", first_write_pipe);
base::RunLoop().RunUntilIdle();
EXPECT_FALSE(read_callback.have_result());
}
// Test the case where a second Init() call occurs when there's a pending Read()
// call in progress. The old Read() should be dropped, in favor of the new
// Init().
TEST_F(DataPipeElementReaderTest, InitInterruptsRead) {
// Value deliberately outside of the range of an uint32_t, to catch any
// accidental conversions to an int.
const uint64_t kResponseBodySize = std::numeric_limits<uint32_t>::max();
// The network stack calls Init.
net::TestCompletionCallback first_init_callback;
EXPECT_EQ(net::ERR_IO_PENDING,
element_reader_.Init(first_init_callback.callback()));
// Wait for DataPipeGetter::Read() to be called.
mojo::ScopedDataPipeProducerHandle first_write_pipe;
network::mojom::DataPipeGetter::ReadCallback first_read_pipe_callback;
data_pipe_getter_.WaitForRead(&first_write_pipe, &first_read_pipe_callback);
std::move(first_read_pipe_callback).Run(net::OK, kResponseBodySize);
ASSERT_EQ(net::OK, first_init_callback.WaitForResult());
auto first_io_buffer = base::MakeRefCounted<net::IOBufferWithSize>(10);
net::TestCompletionCallback first_read_callback;
EXPECT_EQ(net::ERR_IO_PENDING,
element_reader_.Read(first_io_buffer.get(), first_io_buffer->size(),
first_read_callback.callback()));
// The network stack calls Init again, interrupting the previous read.
net::TestCompletionCallback second_init_callback;
EXPECT_EQ(net::ERR_IO_PENDING,
element_reader_.Init(second_init_callback.callback()));
// Wait for DataPipeGetter::Read() to be called again.
mojo::ScopedDataPipeProducerHandle second_write_pipe;
network::mojom::DataPipeGetter::ReadCallback second_read_pipe_callback;
data_pipe_getter_.WaitForRead(&second_write_pipe, &second_read_pipe_callback);
// Run any pending tasks, to make sure nothing unexpected is queued.
base::RunLoop().RunUntilIdle();
EXPECT_FALSE(first_read_callback.have_result());
EXPECT_FALSE(second_init_callback.have_result());
// Sending data on the second pipe should result in the second init callback
// being invoked.
std::move(second_read_pipe_callback).Run(net::OK, kResponseBodySize);
EXPECT_EQ(net::OK, second_init_callback.WaitForResult());
EXPECT_EQ(kResponseBodySize, element_reader_.GetContentLength());
EXPECT_EQ(kResponseBodySize, element_reader_.BytesRemaining());
EXPECT_FALSE(element_reader_.IsInMemory());
// Try to read from the body.
auto io_buffer = base::MakeRefCounted<net::IOBufferWithSize>(10);
net::TestCompletionCallback second_read_callback;
EXPECT_EQ(net::ERR_IO_PENDING,
element_reader_.Read(io_buffer.get(), io_buffer->size(),
second_read_callback.callback()));
// Writes to the first write pipe should either fail, or succeed but be
// ignored.
mojo::BlockingCopyFromString("foo", first_write_pipe);
base::RunLoop().RunUntilIdle();
EXPECT_FALSE(second_read_callback.have_result());
}
} // namespace
} // namespace network
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