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// Copyright 2012 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/speech/chunked_byte_buffer.h"
#include <stdint.h>
#include <cstring>
#include <string>
#include <vector>
#include "base/containers/span.h"
#include "base/containers/span_reader.h"
#include "base/strings/string_view_util.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace speech {
typedef std::vector<uint8_t> ByteVector;
TEST(ChunkedByteBufferTest, BasicTest) {
ChunkedByteBuffer buffer;
constexpr auto kChunks = std::to_array<uint8_t>({
0x00, 0x00, 0x00, 0x04, 0x01, 0x02, 0x03, 0x04, // Chunk 1: 4 bytes
0x00, 0x00, 0x00, 0x02, 0x05, 0x06, // Chunk 2: 2 bytes
0x00, 0x00, 0x00, 0x01, 0x07 // Chunk 3: 1 bytes
});
base::SpanReader reader{base::span(kChunks)};
EXPECT_EQ(0U, buffer.GetTotalLength());
EXPECT_FALSE(buffer.HasChunks());
// Append partially chunk 1.
buffer.Append(base::as_string_view(*reader.Read(2u)));
EXPECT_EQ(2U, buffer.GetTotalLength());
EXPECT_FALSE(buffer.HasChunks());
// Complete chunk 1.
buffer.Append(base::as_string_view(*reader.Read(6u)));
EXPECT_EQ(8U, buffer.GetTotalLength());
EXPECT_TRUE(buffer.HasChunks());
// Append fully chunk 2.
buffer.Append(base::as_string_view(*reader.Read(6u)));
EXPECT_EQ(14U, buffer.GetTotalLength());
EXPECT_TRUE(buffer.HasChunks());
// Remove and check chunk 1.
std::unique_ptr<ByteVector> chunk;
chunk = buffer.PopChunk();
EXPECT_TRUE(chunk != nullptr);
EXPECT_EQ(4U, chunk->size());
EXPECT_EQ(base::span(*chunk), (base::span(kChunks).subspan<4, 4>()));
EXPECT_EQ(6U, buffer.GetTotalLength());
EXPECT_TRUE(buffer.HasChunks());
// Read and check chunk 2.
chunk = buffer.PopChunk();
EXPECT_TRUE(chunk != nullptr);
EXPECT_EQ(2U, chunk->size());
EXPECT_EQ(base::span(*chunk), (base::span(kChunks).subspan<12, 2>()));
EXPECT_EQ(0U, buffer.GetTotalLength());
EXPECT_FALSE(buffer.HasChunks());
// Append fully chunk 3.
buffer.Append(base::as_string_view(*reader.Read(5u)));
EXPECT_EQ(5U, buffer.GetTotalLength());
// Remove and check chunk 3.
chunk = buffer.PopChunk();
EXPECT_TRUE(chunk != nullptr);
EXPECT_EQ(1U, chunk->size());
EXPECT_EQ((*chunk)[0], kChunks[18]);
EXPECT_EQ(0U, buffer.GetTotalLength());
EXPECT_FALSE(buffer.HasChunks());
}
} // namespace speech
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