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rpc: minor refactoring on message_reader (#252)
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Wu Tao
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neverchanje
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Jul 19, 2019
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Original file line number | Diff line number | Diff line change |
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// Copyright (c) 2019, Xiaomi, Inc. All rights reserved. | ||
// This source code is licensed under the Apache License Version 2.0, which | ||
// can be found in the LICENSE file in the root directory of this source tree. | ||
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#include <gtest/gtest.h> | ||
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#include <dsn/tool-api/message_parser.h> | ||
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namespace dsn { | ||
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class message_reader_test : public testing::Test | ||
{ | ||
public: | ||
void test_init() | ||
{ | ||
message_reader reader(4096); | ||
ASSERT_EQ(reader._buffer_block_size, 4096); | ||
ASSERT_EQ(reader._buffer_occupied, 0); | ||
ASSERT_EQ(reader._buffer.length(), 0); | ||
} | ||
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void test_read_buffer() | ||
{ | ||
message_reader reader(4096); | ||
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const char *p1 = reader.read_buffer_ptr(10); | ||
ASSERT_EQ(reader._buffer_occupied, 0); | ||
ASSERT_EQ(reader._buffer.length(), 4096); | ||
reader.mark_read(10); | ||
ASSERT_EQ(reader._buffer_occupied, 10); | ||
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const char *p2 = reader.read_buffer_ptr(10); | ||
ASSERT_EQ(reader._buffer_occupied, 10); | ||
ASSERT_EQ(reader._buffer.length(), 4096); | ||
reader.mark_read(10); | ||
ASSERT_EQ(reader._buffer_occupied, 20); | ||
ASSERT_EQ(p2 - p1, 10); // p1, p2 reside on the same allocated memory buffer. | ||
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reader.read_buffer_ptr(4076); | ||
ASSERT_EQ(reader._buffer_occupied, 20); | ||
ASSERT_EQ(reader._buffer.length(), 4096); | ||
reader.mark_read(4076); | ||
ASSERT_EQ(reader._buffer_occupied, 4096); | ||
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// buffer capacity extends | ||
p1 = reader.read_buffer_ptr(1); | ||
ASSERT_EQ(reader._buffer_occupied, 4096); | ||
ASSERT_EQ(reader._buffer.length(), 4097); | ||
reader.mark_read(1); | ||
ASSERT_EQ(reader._buffer_occupied, 4097); | ||
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// if buffer is not consumed in time, | ||
// each read will cause one data copy | ||
p2 = reader.read_buffer_ptr(3); | ||
reader.mark_read(3); | ||
ASSERT_EQ(reader._buffer.length(), 4100); | ||
ASSERT_EQ(reader._buffer_occupied, 4100); | ||
ASSERT_NE(p2 - p1, 3); | ||
} | ||
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void test_read_data() | ||
{ | ||
message_reader reader(4096); | ||
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std::string data = std::string("THFT") + std::string(44, '\0'); // 48 bytes | ||
data[7] = data[9] = '\1'; | ||
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char *buf = reader.read_buffer_ptr(data.length()); | ||
memcpy(buf, data.data(), data.size()); | ||
reader.mark_read(data.length()); | ||
ASSERT_EQ(reader.buffer().size(), data.length()); | ||
ASSERT_EQ(reader.buffer().to_string(), data); | ||
} | ||
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void test_consume_buffer() | ||
{ | ||
message_reader reader(5000); | ||
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reader.read_buffer_ptr(1000); | ||
reader.mark_read(1000); | ||
ASSERT_EQ(reader._buffer_occupied, 1000); | ||
ASSERT_EQ(reader._buffer.length(), 5000); | ||
ASSERT_EQ(reader.buffer().size(), 1000); | ||
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reader.consume_buffer(500); | ||
ASSERT_EQ(reader._buffer.length(), 4500); | ||
ASSERT_EQ(reader._buffer_occupied, 500); | ||
} | ||
}; | ||
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TEST_F(message_reader_test, init) { test_init(); } | ||
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TEST_F(message_reader_test, read_buffer) { test_read_buffer(); } | ||
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TEST_F(message_reader_test, read_data) { test_read_data(); } | ||
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TEST_F(message_reader_test, consume_buffer) { test_consume_buffer(); } | ||
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} // namespace dsn |