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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/zucchini/buffer_sink.h"
#include <stddef.h>
#include <stdint.h>
#include <vector>
#include "testing/gtest/include/gtest/gtest.h"
namespace zucchini {
constexpr uint8_t kUninit = 0xFF;
class BufferSinkTest : public testing::Test {
protected:
BufferSinkTest()
: buffer_(10, kUninit), sink_(buffer_.data(), buffer_.size()) {}
std::vector<uint8_t> buffer_;
BufferSink sink_;
};
TEST_F(BufferSinkTest, PutValue) {
EXPECT_EQ(size_t(10), sink_.Remaining());
EXPECT_TRUE(sink_.PutValue(uint32_t(0x76543210)));
EXPECT_EQ(size_t(6), sink_.Remaining());
EXPECT_TRUE(sink_.PutValue(uint32_t(0xFEDCBA98)));
EXPECT_EQ(size_t(2), sink_.Remaining());
EXPECT_FALSE(sink_.PutValue(uint32_t(0x00)));
EXPECT_EQ(size_t(2), sink_.Remaining());
EXPECT_TRUE(sink_.PutValue(uint16_t(0x0010)));
EXPECT_EQ(size_t(0), sink_.Remaining());
// Assuming little-endian architecture.
EXPECT_EQ(std::vector<uint8_t>(
{0x10, 0x32, 0x54, 0x76, 0x98, 0xBA, 0xDC, 0xFE, 0x10, 0x00}),
buffer_);
}
TEST_F(BufferSinkTest, PutValueUnaligned) {
EXPECT_EQ(size_t(10), sink_.Remaining());
EXPECT_TRUE(sink_.PutValue(uint8_t(0x10U)));
EXPECT_EQ(size_t(9), sink_.Remaining());
EXPECT_TRUE(sink_.PutValue(uint16_t(0x5432U)));
EXPECT_EQ(size_t(7), sink_.Remaining());
EXPECT_TRUE(sink_.PutValue(uint32_t(0xDCBA9876U)));
EXPECT_EQ(size_t(3), sink_.Remaining());
}
TEST_F(BufferSinkTest, PutRange) {
std::vector<uint8_t> range = {0x10, 0x32, 0x54, 0x76, 0x98, 0xBA,
0xDC, 0xFE, 0x10, 0x00, 0x42};
EXPECT_EQ(size_t(10), sink_.Remaining());
EXPECT_FALSE(sink_.PutRange(range.begin(), range.end()));
EXPECT_EQ(size_t(10), sink_.Remaining());
EXPECT_TRUE(sink_.PutRange(range.begin(), range.begin() + 8));
EXPECT_EQ(size_t(2), sink_.Remaining());
EXPECT_EQ(std::vector<uint8_t>({0x10, 0x32, 0x54, 0x76, 0x98, 0xBA, 0xDC,
0xFE, kUninit, kUninit}),
buffer_);
EXPECT_FALSE(sink_.PutRange(range.begin(), range.begin() + 4));
EXPECT_EQ(size_t(2), sink_.Remaining());
// range is not written
EXPECT_EQ(std::vector<uint8_t>({0x10, 0x32, 0x54, 0x76, 0x98, 0xBA, 0xDC,
0xFE, kUninit, kUninit}),
buffer_);
}
} // namespace zucchini
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