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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "remoting/host/native_messaging/native_messaging_writer.h"
#include <array>
#include <memory>
#include <string>
#include <utility>
#include <vector>
#include "base/containers/span.h"
#include "base/json/json_reader.h"
#include "base/test/values_test_util.h"
#include "base/values.h"
#include "remoting/host/setup/test_util.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace remoting {
class NativeMessagingWriterTest : public testing::Test {
public:
NativeMessagingWriterTest();
~NativeMessagingWriterTest() override;
void SetUp() override;
protected:
std::unique_ptr<NativeMessagingWriter> writer_;
base::File read_file_;
base::File write_file_;
};
NativeMessagingWriterTest::NativeMessagingWriterTest() = default;
NativeMessagingWriterTest::~NativeMessagingWriterTest() = default;
void NativeMessagingWriterTest::SetUp() {
ASSERT_TRUE(MakePipe(&read_file_, &write_file_));
writer_ = std::make_unique<NativeMessagingWriter>(std::move(write_file_));
}
TEST_F(NativeMessagingWriterTest, GoodMessage) {
base::Value::Dict dict;
dict.Set("foo", 42);
base::Value message(std::move(dict));
EXPECT_TRUE(writer_->WriteMessage(message));
// Read and verify header (platform's native endian).
std::uint32_t body_length;
auto header_read = read_file_.ReadAtCurrentPos(
base::as_writable_byte_span(base::span_from_ref(body_length)));
ASSERT_TRUE(header_read.has_value());
ASSERT_EQ(sizeof(body_length), *header_read);
std::string body_buffer(body_length, '\0');
auto body_read =
read_file_.ReadAtCurrentPos(base::as_writable_byte_span(body_buffer));
ASSERT_TRUE(body_read.has_value());
ASSERT_EQ(static_cast<size_t>(body_length), *body_read);
base::Value::Dict written = base::test::ParseJsonDict(body_buffer);
EXPECT_EQ(message, written);
// Ensure no extra data: read returns zero or nullopt on EOF.
writer_.reset();
std::vector<uint8_t> eof_buffer(1);
auto eof_read =
read_file_.ReadAtCurrentPos(base::as_writable_byte_span(eof_buffer));
EXPECT_EQ(0u, eof_read.value_or(0u));
}
TEST_F(NativeMessagingWriterTest, SecondMessage) {
auto messages = std::to_array<base::Value>({
base::Value(base::Value::Dict{}),
base::Value(base::Value::Dict().Set("foo", 42)),
});
EXPECT_TRUE(writer_->WriteMessage(messages[0]));
EXPECT_TRUE(writer_->WriteMessage(messages[1]));
writer_.reset();
for (size_t i = 0; i < messages.size(); ++i) {
std::uint32_t length;
auto header_read = read_file_.ReadAtCurrentPos(
base::as_writable_byte_span(base::span_from_ref(length)));
ASSERT_TRUE(header_read.has_value());
ASSERT_EQ(sizeof(length), *header_read) << "i = " << i;
std::string body_buffer(length, '\0');
auto body_read =
read_file_.ReadAtCurrentPos(base::as_writable_byte_span(body_buffer));
ASSERT_TRUE(body_read.has_value());
ASSERT_EQ(static_cast<size_t>(length), *body_read) << "i = " << i;
// Verify message content.
base::Value::Dict written = base::test::ParseJsonDict(body_buffer);
EXPECT_EQ(messages[i], written);
}
}
TEST_F(NativeMessagingWriterTest, FailedWrite) {
// Close the read end so that writing fails immediately.
read_file_.Close();
base::Value message(base::Value::Dict{});
EXPECT_FALSE(writer_->WriteMessage(message));
}
} // namespace remoting
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