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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include <algorithm>
#include "gtest/gtest.h"
#include "Helpers.h"
#include "mozilla/gtest/MozAssertions.h"
#include "mozilla/SnappyCompressOutputStream.h"
#include "mozilla/SnappyUncompressInputStream.h"
#include "nsIPipe.h"
#include "nsStreamUtils.h"
#include "nsString.h"
#include "nsStringStream.h"
#include "nsTArray.h"
namespace {
using mozilla::SnappyCompressOutputStream;
using mozilla::SnappyUncompressInputStream;
static already_AddRefed<nsIOutputStream> CompressPipe(
nsIInputStream** aReaderOut) {
nsCOMPtr<nsIOutputStream> pipeWriter;
NS_NewPipe(aReaderOut, getter_AddRefs(pipeWriter));
nsCOMPtr<nsIOutputStream> compress =
new SnappyCompressOutputStream(pipeWriter);
return compress.forget();
}
// Verify the given number of bytes compresses to a smaller number of bytes.
static void TestCompress(uint32_t aNumBytes) {
// Don't permit this test on small data sizes as snappy can slightly
// bloat very small content.
ASSERT_GT(aNumBytes, 1024u);
nsCOMPtr<nsIInputStream> pipeReader;
nsCOMPtr<nsIOutputStream> compress = CompressPipe(getter_AddRefs(pipeReader));
ASSERT_TRUE(compress);
nsTArray<char> inputData;
testing::CreateData(aNumBytes, inputData);
testing::WriteAllAndClose(compress, inputData);
nsAutoCString outputData;
nsresult rv = NS_ConsumeStream(pipeReader, UINT32_MAX, outputData);
ASSERT_NS_SUCCEEDED(rv);
ASSERT_LT(outputData.Length(), inputData.Length());
}
// Verify that the given number of bytes can be compressed and uncompressed
// successfully.
static void TestCompressUncompress(uint32_t aNumBytes) {
nsCOMPtr<nsIInputStream> pipeReader;
nsCOMPtr<nsIOutputStream> compress = CompressPipe(getter_AddRefs(pipeReader));
ASSERT_TRUE(compress);
nsCOMPtr<nsIInputStream> uncompress =
new SnappyUncompressInputStream(pipeReader);
nsTArray<char> inputData;
testing::CreateData(aNumBytes, inputData);
testing::WriteAllAndClose(compress, inputData);
nsAutoCString outputData;
nsresult rv = NS_ConsumeStream(uncompress, UINT32_MAX, outputData);
ASSERT_NS_SUCCEEDED(rv);
ASSERT_EQ(inputData.Length(), outputData.Length());
for (uint32_t i = 0; i < inputData.Length(); ++i) {
EXPECT_EQ(inputData[i], outputData.get()[i]) << "Byte " << i;
}
}
static void TestUncompressCorrupt(const char* aCorruptData,
uint32_t aCorruptLength) {
nsCOMPtr<nsIInputStream> source;
nsresult rv = NS_NewByteInputStream(
getter_AddRefs(source), mozilla::Span(aCorruptData, aCorruptLength),
NS_ASSIGNMENT_DEPEND);
ASSERT_NS_SUCCEEDED(rv);
nsCOMPtr<nsIInputStream> uncompress = new SnappyUncompressInputStream(source);
nsAutoCString outputData;
rv = NS_ConsumeStream(uncompress, UINT32_MAX, outputData);
ASSERT_EQ(NS_ERROR_CORRUPTED_CONTENT, rv);
}
} // namespace
TEST(SnappyStream, Compress_32k)
{ TestCompress(32 * 1024); }
TEST(SnappyStream, Compress_64k)
{ TestCompress(64 * 1024); }
TEST(SnappyStream, Compress_128k)
{ TestCompress(128 * 1024); }
TEST(SnappyStream, CompressUncompress_0)
{ TestCompressUncompress(0); }
TEST(SnappyStream, CompressUncompress_1)
{ TestCompressUncompress(1); }
TEST(SnappyStream, CompressUncompress_32)
{ TestCompressUncompress(32); }
TEST(SnappyStream, CompressUncompress_1k)
{ TestCompressUncompress(1024); }
TEST(SnappyStream, CompressUncompress_32k)
{ TestCompressUncompress(32 * 1024); }
TEST(SnappyStream, CompressUncompress_64k)
{ TestCompressUncompress(64 * 1024); }
TEST(SnappyStream, CompressUncompress_128k)
{ TestCompressUncompress(128 * 1024); }
// Test buffers that are not exactly power-of-2 in length to try to
// exercise more edge cases. The number 13 is arbitrary.
TEST(SnappyStream, CompressUncompress_256k_less_13)
{ TestCompressUncompress((256 * 1024) - 13); }
TEST(SnappyStream, CompressUncompress_256k)
{ TestCompressUncompress(256 * 1024); }
TEST(SnappyStream, CompressUncompress_256k_plus_13)
{ TestCompressUncompress((256 * 1024) + 13); }
TEST(SnappyStream, UncompressCorruptStreamIdentifier)
{
static const char data[] = "This is not a valid compressed stream";
TestUncompressCorrupt(data, strlen(data));
}
TEST(SnappyStream, UncompressCorruptCompressedDataLength)
{
static const char data[] =
"\xff\x06\x00\x00sNaPpY" // stream identifier
"\x00\x99\x00\x00This is not a valid compressed stream";
static const uint32_t dataLength = (sizeof(data) / sizeof(const char)) - 1;
TestUncompressCorrupt(data, dataLength);
}
TEST(SnappyStream, UncompressCorruptCompressedDataContent)
{
static const char data[] =
"\xff\x06\x00\x00sNaPpY" // stream identifier
"\x00\x25\x00\x00This is not a valid compressed stream";
static const uint32_t dataLength = (sizeof(data) / sizeof(const char)) - 1;
TestUncompressCorrupt(data, dataLength);
}
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