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// 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 <string>
#include <vector>
#include "base/bind.h"
#include "base/callback.h"
#include "base/memory/scoped_ptr.h"
#include "base/run_loop.h"
#include "base/scoped_observer.h"
#include "device/hid/hid_connection.h"
#include "device/hid/hid_service.h"
#include "device/test/usb_test_gadget.h"
#include "net/base/io_buffer.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace device {
namespace {
using net::IOBufferWithSize;
// Helper class that can be used to block until a HID device with a particular
// serial number is available. Example usage:
//
// DeviceCatcher device_catcher("ABC123");
// HidDeviceId device_id = device_catcher.WaitForDevice();
// /* Call HidService::Connect(device_id) to open the device. */
//
class DeviceCatcher : HidService::Observer {
public:
DeviceCatcher(const std::string& serial_number)
: serial_number_(serial_number), observer_(this) {
HidService* hid_service = HidService::GetInstance(
base::MessageLoop::current()->message_loop_proxy());
observer_.Add(hid_service);
hid_service->GetDevices(base::Bind(&DeviceCatcher::OnEnumerationComplete,
base::Unretained(this)));
}
const HidDeviceId& WaitForDevice() {
run_loop_.Run();
observer_.RemoveAll();
return device_id_;
}
private:
void OnEnumerationComplete(const std::vector<HidDeviceInfo>& devices) {
for (const HidDeviceInfo& device_info : devices) {
if (device_info.serial_number == serial_number_) {
device_id_ = device_info.device_id;
run_loop_.Quit();
break;
}
}
}
void OnDeviceAdded(const HidDeviceInfo& device_info) override {
if (device_info.serial_number == serial_number_) {
device_id_ = device_info.device_id;
run_loop_.Quit();
}
}
std::string serial_number_;
ScopedObserver<device::HidService, device::HidService::Observer> observer_;
base::RunLoop run_loop_;
HidDeviceId device_id_;
};
class TestConnectCallback {
public:
TestConnectCallback()
: callback_(base::Bind(&TestConnectCallback::SetConnection,
base::Unretained(this))) {}
~TestConnectCallback() {}
void SetConnection(scoped_refptr<HidConnection> connection) {
connection_ = connection;
run_loop_.Quit();
}
scoped_refptr<HidConnection> WaitForConnection() {
run_loop_.Run();
return connection_;
}
const HidService::ConnectCallback& callback() { return callback_; }
private:
HidService::ConnectCallback callback_;
base::RunLoop run_loop_;
scoped_refptr<HidConnection> connection_;
};
class TestIoCallback {
public:
TestIoCallback()
: read_callback_(
base::Bind(&TestIoCallback::SetReadResult, base::Unretained(this))),
write_callback_(base::Bind(&TestIoCallback::SetWriteResult,
base::Unretained(this))) {}
~TestIoCallback() {}
void SetReadResult(bool success,
scoped_refptr<net::IOBuffer> buffer,
size_t size) {
result_ = success;
buffer_ = buffer;
size_ = size;
run_loop_.Quit();
}
void SetWriteResult(bool success) {
result_ = success;
run_loop_.Quit();
}
bool WaitForResult() {
run_loop_.Run();
return result_;
}
const HidConnection::ReadCallback& read_callback() { return read_callback_; }
const HidConnection::WriteCallback write_callback() {
return write_callback_;
}
scoped_refptr<net::IOBuffer> buffer() const { return buffer_; }
size_t size() const { return size_; }
private:
base::RunLoop run_loop_;
bool result_;
size_t size_;
scoped_refptr<net::IOBuffer> buffer_;
HidConnection::ReadCallback read_callback_;
HidConnection::WriteCallback write_callback_;
};
} // namespace
class HidConnectionTest : public testing::Test {
protected:
void SetUp() override {
if (!UsbTestGadget::IsTestEnabled()) return;
message_loop_.reset(new base::MessageLoopForIO());
service_ = HidService::GetInstance(message_loop_->message_loop_proxy());
ASSERT_TRUE(service_);
test_gadget_ = UsbTestGadget::Claim();
ASSERT_TRUE(test_gadget_);
ASSERT_TRUE(test_gadget_->SetType(UsbTestGadget::HID_ECHO));
DeviceCatcher device_catcher(test_gadget_->GetSerialNumber());
device_id_ = device_catcher.WaitForDevice();
ASSERT_NE(device_id_, kInvalidHidDeviceId);
}
scoped_ptr<base::MessageLoopForIO> message_loop_;
HidService* service_;
scoped_ptr<UsbTestGadget> test_gadget_;
HidDeviceId device_id_;
};
TEST_F(HidConnectionTest, ReadWrite) {
if (!UsbTestGadget::IsTestEnabled()) return;
TestConnectCallback connect_callback;
service_->Connect(device_id_, connect_callback.callback());
scoped_refptr<HidConnection> conn = connect_callback.WaitForConnection();
ASSERT_TRUE(conn.get());
const char kBufferSize = 9;
for (char i = 0; i < 8; ++i) {
scoped_refptr<IOBufferWithSize> buffer(new IOBufferWithSize(kBufferSize));
buffer->data()[0] = 0;
for (unsigned char j = 1; j < kBufferSize; ++j) {
buffer->data()[j] = i + j - 1;
}
TestIoCallback write_callback;
conn->Write(buffer, buffer->size(), write_callback.write_callback());
ASSERT_TRUE(write_callback.WaitForResult());
TestIoCallback read_callback;
conn->Read(read_callback.read_callback());
ASSERT_TRUE(read_callback.WaitForResult());
ASSERT_EQ(9UL, read_callback.size());
ASSERT_EQ(0, read_callback.buffer()->data()[0]);
for (unsigned char j = 1; j < kBufferSize; ++j) {
ASSERT_EQ(i + j - 1, read_callback.buffer()->data()[j]);
}
}
conn->Close();
}
} // namespace device
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