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// Copyright (c) 2012 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 <gtest/gtest.h>
#include <queue>
#include <string>
#include <vector>
#include <sys/wait.h>
#include "base/bind.h"
#include "base/eintr_wrapper.h"
#include "base/file_util.h"
#include "base/synchronization/waitable_event.h"
#include "base/threading/thread.h"
#include "chrome/browser/chromeos/process_proxy/process_output_watcher.h"
struct TestCase {
std::string str;
ProcessOutputType type;
TestCase(std::string expected_string, ProcessOutputType expected_type)
: str(expected_string),
type(expected_type) {
}
};
class ProcessWatcherExpectations {
public:
ProcessWatcherExpectations() {}
void Init(const std::vector<TestCase>& expectations) {
received_from_out_ = 0;
received_from_err_ = 0;
for (size_t i = 0; i < expectations.size(); i++) {
if (expectations[i].type == PROCESS_OUTPUT_TYPE_OUT) {
out_expectations_.append(expectations[i].str);
} else {
err_expectations_.append(expectations[i].str);
}
}
}
void CheckExpectations(const std::string& data, ProcessOutputType type) {
const std::string& expectations =
(type == PROCESS_OUTPUT_TYPE_OUT) ? out_expectations_
: err_expectations_;
size_t& received =
(type == PROCESS_OUTPUT_TYPE_OUT) ? received_from_out_
: received_from_err_;
EXPECT_LT(received, expectations.length());
if (received >= expectations.length())
return;
EXPECT_EQ(received, expectations.find(data, received));
received += data.length();
}
bool IsDone() {
return received_from_out_ >= out_expectations_.length() &&
received_from_err_ >= err_expectations_.length();
}
private:
std::string out_expectations_;
size_t received_from_out_;
std::string err_expectations_;
size_t received_from_err_;
};
class ProcessOutputWatcherTest : public testing::Test {
public:
void StartWatch(int pt, int stop,
const std::vector<TestCase>& expectations) {
expectations_.Init(expectations);
// This will delete itself.
ProcessOutputWatcher* crosh_watcher = new ProcessOutputWatcher(pt, stop,
base::Bind(&ProcessOutputWatcherTest::OnRead, base::Unretained(this)));
crosh_watcher->Start();
}
void OnRead(ProcessOutputType type, const std::string& output) {
expectations_.CheckExpectations(output, type);
if (expectations_.IsDone())
all_data_received_->Signal();
}
protected:
std::string VeryLongString() {
std::string result = "0123456789";
for (int i = 0; i < 8; i++)
result = result.append(result);
return result;
}
scoped_ptr<base::WaitableEvent> all_data_received_;
private:
ProcessWatcherExpectations expectations_;
std::vector<TestCase> exp;
};
TEST_F(ProcessOutputWatcherTest, OutputWatcher) {
all_data_received_.reset(new base::WaitableEvent(true, false));
base::Thread output_watch_thread("ProcessOutpuWatchThread");
ASSERT_TRUE(output_watch_thread.Start());
int pt_pipe[2], stop_pipe[2];
ASSERT_FALSE(HANDLE_EINTR(pipe(pt_pipe)));
ASSERT_FALSE(HANDLE_EINTR(pipe(stop_pipe)));
// TODO(tbarzic): We don't support stderr anymore, so this can be simplified.
std::vector<TestCase> test_cases;
test_cases.push_back(TestCase("testing output\n", PROCESS_OUTPUT_TYPE_OUT));
test_cases.push_back(TestCase("testing error\n", PROCESS_OUTPUT_TYPE_OUT));
test_cases.push_back(TestCase("testing error1\n", PROCESS_OUTPUT_TYPE_OUT));
test_cases.push_back(TestCase("testing output1\n", PROCESS_OUTPUT_TYPE_OUT));
test_cases.push_back(TestCase("testing output2\n", PROCESS_OUTPUT_TYPE_OUT));
test_cases.push_back(TestCase("testing output3\n", PROCESS_OUTPUT_TYPE_OUT));
test_cases.push_back(TestCase(VeryLongString(), PROCESS_OUTPUT_TYPE_OUT));
test_cases.push_back(TestCase("testing error2\n", PROCESS_OUTPUT_TYPE_OUT));
output_watch_thread.message_loop()->PostTask(FROM_HERE,
base::Bind(&ProcessOutputWatcherTest::StartWatch, base::Unretained(this),
pt_pipe[0], stop_pipe[0], test_cases));
for (size_t i = 0; i < test_cases.size(); i++) {
// Let's make inputs not NULL terminated.
const std::string& test_str = test_cases[i].str;
ssize_t test_size = test_str.length() * sizeof(*test_str.c_str());
EXPECT_EQ(test_size,
file_util::WriteFileDescriptor(pt_pipe[1], test_str.c_str(),
test_size));
}
all_data_received_->Wait();
// Send stop signal. It is not important which string we send.
EXPECT_EQ(1, file_util::WriteFileDescriptor(stop_pipe[1], "q", 1));
EXPECT_NE(-1, HANDLE_EINTR(close(stop_pipe[1])));
EXPECT_NE(-1, HANDLE_EINTR(close(pt_pipe[1])));
output_watch_thread.Stop();
};
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