adb: add unit test for fdevent.
Change-Id: Ic26cda5d8e84425bc60ce36bc686bb6917c4ca3c
diff --git a/adb/fdevent_test.cpp b/adb/fdevent_test.cpp
new file mode 100644
index 0000000..f7622b5
--- /dev/null
+++ b/adb/fdevent_test.cpp
@@ -0,0 +1,152 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "fdevent.h"
+
+#include <gtest/gtest.h>
+
+#include <queue>
+#include <string>
+#include <vector>
+
+#include <pthread.h>
+#include <signal.h>
+
+#include "adb_io.h"
+
+class SignalHandlerRegister {
+ public:
+ SignalHandlerRegister(const std::vector<int>& signums, void (*handler)(int)) {
+ for (auto& sig : signums) {
+ sig_t old_handler = signal(sig, handler);
+ saved_signal_handlers_.push_back(std::make_pair(sig, old_handler));
+ }
+ }
+
+ ~SignalHandlerRegister() {
+ for (auto& pair : saved_signal_handlers_) {
+ signal(pair.first, pair.second);
+ }
+ }
+
+ private:
+ std::vector<std::pair<int, sig_t>> saved_signal_handlers_;
+};
+
+class FdHandler {
+ public:
+ FdHandler(int read_fd, int write_fd) : read_fd_(read_fd), write_fd_(write_fd) {
+ fdevent_install(&read_fde_, read_fd_, FdEventCallback, this);
+ fdevent_add(&read_fde_, FDE_READ | FDE_ERROR);
+ fdevent_install(&write_fde_, write_fd_, FdEventCallback, this);
+ fdevent_add(&write_fde_, FDE_ERROR);
+ }
+
+ private:
+ static void FdEventCallback(int fd, unsigned events, void* userdata) {
+ FdHandler* handler = reinterpret_cast<FdHandler*>(userdata);
+ ASSERT_EQ(0u, (events & ~(FDE_READ | FDE_WRITE))) << "unexpected events: " << events;
+ if (events & FDE_READ) {
+ ASSERT_EQ(fd, handler->read_fd_);
+ char c;
+ ASSERT_EQ(1, read(fd, &c, 1));
+ handler->queue_.push(c);
+ fdevent_add(&handler->write_fde_, FDE_WRITE);
+ }
+ if (events & FDE_WRITE) {
+ ASSERT_EQ(fd, handler->write_fd_);
+ ASSERT_FALSE(handler->queue_.empty());
+ char c = handler->queue_.front();
+ handler->queue_.pop();
+ ASSERT_EQ(1, write(fd, &c, 1));
+ if (handler->queue_.empty()) {
+ fdevent_del(&handler->write_fde_, FDE_WRITE);
+ }
+ }
+ }
+
+ private:
+ const int read_fd_;
+ const int write_fd_;
+ fdevent read_fde_;
+ fdevent write_fde_;
+ std::queue<char> queue_;
+};
+
+static void signal_handler(int) {
+ pthread_exit(nullptr);
+}
+
+struct ThreadArg {
+ int first_read_fd;
+ int last_write_fd;
+ size_t middle_pipe_count;
+};
+
+static void FdEventThreadFunc(ThreadArg* arg) {
+ SignalHandlerRegister signal_handler_register({SIGUSR1}, signal_handler);
+
+ std::vector<int> read_fds;
+ std::vector<int> write_fds;
+
+ read_fds.push_back(arg->first_read_fd);
+ for (size_t i = 0; i < arg->middle_pipe_count; ++i) {
+ int fds[2];
+ ASSERT_EQ(0, pipe(fds));
+ read_fds.push_back(fds[0]);
+ write_fds.push_back(fds[1]);
+ }
+ write_fds.push_back(arg->last_write_fd);
+
+ std::vector<std::unique_ptr<FdHandler>> fd_handlers;
+ for (size_t i = 0; i < read_fds.size(); ++i) {
+ fd_handlers.push_back(std::unique_ptr<FdHandler>(new FdHandler(read_fds[i], write_fds[i])));
+ }
+
+ fdevent_loop();
+}
+
+TEST(fdevent, smoke) {
+ const size_t PIPE_COUNT = 10;
+ const size_t MESSAGE_LOOP_COUNT = 100;
+ const std::string MESSAGE = "fdevent_test";
+ int fd_pair1[2];
+ int fd_pair2[2];
+ ASSERT_EQ(0, pipe(fd_pair1));
+ ASSERT_EQ(0, pipe(fd_pair2));
+ pthread_t thread;
+ ThreadArg thread_arg;
+ thread_arg.first_read_fd = fd_pair1[0];
+ thread_arg.last_write_fd = fd_pair2[1];
+ thread_arg.middle_pipe_count = PIPE_COUNT;
+ int writer = fd_pair1[1];
+ int reader = fd_pair2[0];
+
+ ASSERT_EQ(0, pthread_create(&thread, nullptr,
+ reinterpret_cast<void* (*)(void*)>(FdEventThreadFunc),
+ &thread_arg));
+
+ for (size_t i = 0; i < MESSAGE_LOOP_COUNT; ++i) {
+ std::string read_buffer = MESSAGE;
+ std::string write_buffer(MESSAGE.size(), 'a');
+ ASSERT_TRUE(WriteFdExactly(writer, read_buffer.c_str(), read_buffer.size()));
+ ASSERT_TRUE(ReadFdExactly(reader, &write_buffer[0], write_buffer.size()));
+ ASSERT_EQ(read_buffer, write_buffer);
+ }
+
+ ASSERT_EQ(0, pthread_kill(thread, SIGUSR1));
+ ASSERT_EQ(0, pthread_join(thread, nullptr));
+}