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// Copyright 2016 The Bazel Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "src/tools/singlejar/zlib_interface.h"
#include "gtest/gtest.h"
namespace {
static const uint8_t bytes[] = {1, 2, 3, 4, 1, 2, 3, 4, 1, 2, 3, 4};
TEST(ZlibInterfaceTest, DeflateFully) {
Deflater deflater;
uint8_t compressed[256];
deflater.next_out = compressed;
deflater.avail_out = sizeof(compressed);
EXPECT_EQ(Z_STREAM_END, deflater.Deflate(bytes, sizeof(bytes), Z_FINISH));
}
TEST(ZlibInterfaceTest, DeflateIntoChunks) {
Deflater deflater;
uint8_t compressed[256];
deflater.next_out = compressed;
deflater.avail_out = 2;
EXPECT_EQ(Z_OK, deflater.Deflate(bytes, sizeof(bytes), Z_FINISH));
EXPECT_EQ(0, deflater.avail_out);
deflater.next_out = compressed + 2;
deflater.avail_out = sizeof(compressed) - 2;
EXPECT_EQ(Z_STREAM_END,
deflater.Deflate(deflater.next_in,
deflater.avail_in, Z_FINISH));
}
TEST(ZlibInterfaceTest, DeflateChunks) {
Deflater deflater;
uint8_t compressed[256];
deflater.next_out = compressed;
deflater.avail_out = sizeof(compressed);
EXPECT_EQ(Z_OK, deflater.Deflate(bytes, 4, Z_NO_FLUSH));
EXPECT_EQ(Z_STREAM_END,
deflater.Deflate(bytes + 4, sizeof(bytes) - 4, Z_FINISH));
}
TEST(ZlibInterfaceTest, InflateFully) {
uint8_t compressed[256];
Deflater deflater;
deflater.next_out = compressed;
deflater.avail_out = sizeof(compressed);
EXPECT_EQ(Z_STREAM_END, deflater.Deflate(bytes, sizeof(bytes), Z_FINISH));
// Now we have deflated data, inflate it back and compare.
size_t compressed_size = sizeof(compressed) - deflater.avail_out;
Inflater inflater;
inflater.DataToInflate(compressed, compressed_size);
uint8_t uncompressed[256];
memset(uncompressed, 0, sizeof(uncompressed));
EXPECT_EQ(Z_STREAM_END,
inflater.Inflate(uncompressed, sizeof(uncompressed)));
EXPECT_EQ(sizeof(bytes), sizeof(uncompressed) - inflater.available_out());
EXPECT_EQ(0, memcmp(bytes, uncompressed, sizeof(bytes)));
}
TEST(ZlibInterfaceTest, InflateToChunks) {
uint8_t compressed[256];
Deflater deflater;
deflater.next_out = compressed;
deflater.avail_out = sizeof(compressed);
EXPECT_EQ(Z_STREAM_END, deflater.Deflate(bytes, sizeof(bytes), Z_FINISH));
// Now we have deflated data, inflate it back and compare.
size_t compressed_size = sizeof(compressed) - deflater.avail_out;
Inflater inflater;
inflater.DataToInflate(compressed, compressed_size);
uint8_t uncompressed[256];
memset(uncompressed, 0, sizeof(uncompressed));
EXPECT_EQ(Z_OK, inflater.Inflate(uncompressed, 3));
EXPECT_EQ(Z_STREAM_END,
inflater.Inflate(uncompressed + 3, sizeof(uncompressed) - 3));
EXPECT_EQ(0, memcmp(bytes, uncompressed, sizeof(bytes)));
}
} // namespace
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