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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/file_util.h"
#include "base/posix/eintr_wrapper.h"
#include "base/synchronization/waitable_event.h"
#include "base/threading/thread.h"
#include "chromeos/process_proxy/process_output_watcher.h"
namespace chromeos {
struct TestCase {
std::string str;
bool should_send_terminating_null;
TestCase(const std::string& expected_string,
bool send_terminating_null)
: str(expected_string),
should_send_terminating_null(send_terminating_null) {
}
};
class ProcessWatcherExpectations {
public:
ProcessWatcherExpectations() {}
void Init(const std::vector<TestCase>& expectations) {
received_from_out_ = 0;
for (size_t i = 0; i < expectations.size(); i++) {
out_expectations_.append(expectations[i].str);
if (expectations[i].should_send_terminating_null)
out_expectations_.append(std::string("", 1));
}
}
bool CheckExpectations(const std::string& data, ProcessOutputType type) {
EXPECT_EQ(PROCESS_OUTPUT_TYPE_OUT, type);
if (type != PROCESS_OUTPUT_TYPE_OUT)
return false;
EXPECT_LT(received_from_out_, out_expectations_.length());
if (received_from_out_ >= out_expectations_.length())
return false;
EXPECT_EQ(received_from_out_,
out_expectations_.find(data, received_from_out_));
received_from_out_ += data.length();
return true;
}
bool IsDone() {
return received_from_out_ >= out_expectations_.length();
}
private:
std::string out_expectations_;
size_t received_from_out_;
};
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) {
bool success = expectations_.CheckExpectations(output, type);
if (!success || 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;
}
void RunTest(const std::vector<TestCase>& test_cases) {
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)));
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++) {
const std::string& test_str = test_cases[i].str;
// Let's make inputs not NULL terminated, unless other is specified in
// the test case.
ssize_t test_size = test_str.length() * sizeof(*test_str.c_str());
if (test_cases[i].should_send_terminating_null)
test_size += 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, IGNORE_EINTR(close(stop_pipe[1])));
EXPECT_NE(-1, IGNORE_EINTR(close(pt_pipe[1])));
output_watch_thread.Stop();
}
scoped_ptr<base::WaitableEvent> all_data_received_;
private:
ProcessWatcherExpectations expectations_;
std::vector<TestCase> exp;
};
TEST_F(ProcessOutputWatcherTest, OutputWatcher) {
std::vector<TestCase> test_cases;
test_cases.push_back(TestCase("testing output\n", false));
test_cases.push_back(TestCase("testing error\n", false));
test_cases.push_back(TestCase("testing error1\n", false));
test_cases.push_back(TestCase("testing output1\n", false));
test_cases.push_back(TestCase("testing output2\n", false));
test_cases.push_back(TestCase("testing output3\n", false));
test_cases.push_back(TestCase(VeryLongString(), false));
test_cases.push_back(TestCase("testing error2\n", false));
RunTest(test_cases);
};
// Verifies that sending '\0' generates PROCESS_OUTPUT_TYPE_OUT event and does
// not terminate output watcher.
TEST_F(ProcessOutputWatcherTest, SendNull) {
std::vector<TestCase> test_cases;
// This will send '\0' to output wathcer.
test_cases.push_back(TestCase("", true));
// Let's verify that next input also gets detected (i.e. output watcher does
// not exit after seeing '\0' from previous test case).
test_cases.push_back(TestCase("a", true));
RunTest(test_cases);
};
} // namespace chromeos
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