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/*
* Copyright 2009, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/stat.h>
#include <algorithm>
#include "core/cross/client.h"
#include "import/cross/gz_decompressor.h"
#include "import/cross/memory_buffer.h"
#include "tests/common/win/testing_common.h"
#include "tests/common/cross/test_utils.h"
using test_utils::ReadFile;
namespace o3d {
class GzDecompressorTest : public testing::Test {
};
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Receives bytes from the decompressor and buffers them
//
class GzTestClient : public StreamProcessor {
public:
explicit GzTestClient(size_t uncompressed_size) {
buffer_.Allocate(uncompressed_size);
stream_.Assign(buffer_, uncompressed_size);
}
virtual int ProcessBytes(MemoryReadStream *input_stream,
size_t bytes_to_process) {
// Buffer the uncompressed bytes we're given
const uint8 *p = input_stream->GetDirectMemoryPointer();
input_stream->Skip(bytes_to_process);
size_t bytes_written = stream_.Write(p, bytes_to_process);
EXPECT_EQ(bytes_written, bytes_to_process);
return Z_OK;
}
// When we're done decompressing, we can check the results here
uint8 *GetResultBuffer() { return buffer_; }
size_t GetResultLength() const { return stream_.GetStreamPosition(); }
private:
MemoryBuffer<uint8> buffer_;
MemoryWriteStream stream_;
};
// Loads a tar.gz file, runs it through the processor.
// In our callbacks, we verify that we receive three files with known contents
//
TEST_F(GzDecompressorTest, LoadGzFile) {
String compressed_file = *g_program_path + "/archive_files/keyboard.jpg.gz";
String uncompressed_file = *g_program_path + "/archive_files/keyboard.jpg";
// Read the compressed and uncompressed files into memory.
// We can then run the decompressor and check it against the expected
// uncompressed data...
size_t compressed_size;
size_t uncompressed_size;
uint8 *compressed_data = ReadFile(compressed_file, &compressed_size);
uint8 *expected_uncompressed_data =
ReadFile(uncompressed_file, &uncompressed_size);
ASSERT_TRUE(compressed_data != NULL);
ASSERT_TRUE(expected_uncompressed_data != NULL);
// Gets callbacks for the uncompressed data
GzTestClient decompressor_client(uncompressed_size);
// The class we're testing...
GzDecompressor decompressor(&decompressor_client);
// Now that we've read the compressed file into memory, lets
// feed it, a chunk at a time, into the decompressor
const int kChunkSize = 512;
MemoryReadStream compressed_stream(compressed_data, compressed_size);
size_t bytes_to_process = compressed_size;
int result = Z_OK;
while (bytes_to_process > 0) {
size_t bytes_this_time =
bytes_to_process < kChunkSize ? bytes_to_process : kChunkSize;
result = decompressor.ProcessBytes(&compressed_stream, bytes_this_time);
EXPECT_TRUE(result == Z_OK || result == Z_STREAM_END);
bytes_to_process -= bytes_this_time;
}
// When the decompressor has finished it should return Z_STREAM_END
EXPECT_TRUE(result == Z_STREAM_END);
// Now let's verify that what we just decompressed matches exactly
// what's in the reference file...
// First check that the lengths match
EXPECT_EQ(decompressor_client.GetResultLength(), uncompressed_size);
// Now check the data
result = memcmp(decompressor_client.GetResultBuffer(),
expected_uncompressed_data,
uncompressed_size);
EXPECT_EQ(0, result);
free(compressed_data);
free(expected_uncompressed_data);
}
} // namespace o3d
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