forked from lix-project/lix
Ilya K
7d52d74bbe
If we've consumed the entire input, that doesn't actually mean we're
done decompressing - there might be more output left. This worked (?)
in most cases because the input and output sizes are pretty comparable,
but sometimes they're not and then things get very funny.
Change-Id: I73435a654a911b8ce25119f713b80706c5783c1b
108 lines
3.4 KiB
C++
108 lines
3.4 KiB
C++
#include "compression.hh"
|
|
#include <gtest/gtest.h>
|
|
|
|
namespace nix {
|
|
|
|
/* ----------------------------------------------------------------------------
|
|
* compress / decompress
|
|
* --------------------------------------------------------------------------*/
|
|
|
|
TEST(compress, compressWithUnknownMethod) {
|
|
ASSERT_THROW(compress("invalid-method", "something-to-compress"), UnknownCompressionMethod);
|
|
}
|
|
|
|
TEST(compress, noneMethodDoesNothingToTheInput) {
|
|
auto o = compress("none", "this-is-a-test");
|
|
|
|
ASSERT_EQ(o, "this-is-a-test");
|
|
}
|
|
|
|
TEST(decompress, decompressNoneCompressed) {
|
|
auto method = "none";
|
|
auto str = "slfja;sljfklsa;jfklsjfkl;sdjfkl;sadjfkl;sdjf;lsdfjsadlf";
|
|
auto o = decompress(method, str);
|
|
|
|
ASSERT_EQ(o, str);
|
|
}
|
|
|
|
TEST(decompress, decompressEmptyCompressed) {
|
|
// Empty-method decompression used e.g. by S3 store
|
|
// (Content-Encoding == "").
|
|
auto method = "";
|
|
auto str = "slfja;sljfklsa;jfklsjfkl;sdjfkl;sadjfkl;sdjf;lsdfjsadlf";
|
|
auto o = decompress(method, str);
|
|
|
|
ASSERT_EQ(o, str);
|
|
}
|
|
|
|
TEST(decompress, decompressXzCompressed) {
|
|
auto method = "xz";
|
|
auto str = "slfja;sljfklsa;jfklsjfkl;sdjfkl;sadjfkl;sdjf;lsdfjsadlf";
|
|
auto o = decompress(method, compress(method, str));
|
|
|
|
ASSERT_EQ(o, str);
|
|
}
|
|
|
|
TEST(decompress, decompressBzip2Compressed) {
|
|
auto method = "bzip2";
|
|
auto str = "slfja;sljfklsa;jfklsjfkl;sdjfkl;sadjfkl;sdjf;lsdfjsadlf";
|
|
auto o = decompress(method, compress(method, str));
|
|
|
|
ASSERT_EQ(o, str);
|
|
}
|
|
|
|
TEST(decompress, decompressBrCompressed) {
|
|
auto method = "br";
|
|
auto str = "slfja;sljfklsa;jfklsjfkl;sdjfkl;sadjfkl;sdjf;lsdfjsadlf";
|
|
auto o = decompress(method, compress(method, str));
|
|
|
|
ASSERT_EQ(o, str);
|
|
}
|
|
|
|
TEST(decompress, decompressInvalidInputThrowsCompressionError) {
|
|
auto method = "bzip2";
|
|
auto str = "this is a string that does not qualify as valid bzip2 data";
|
|
|
|
ASSERT_THROW(decompress(method, str), CompressionError);
|
|
}
|
|
|
|
TEST(decompress, veryLongBrotli) {
|
|
auto method = "br";
|
|
auto str = std::string(65536, 'a');
|
|
auto o = decompress(method, compress(method, str));
|
|
|
|
// This is just to not print 64k of "a" for most failures
|
|
ASSERT_EQ(o.length(), str.length());
|
|
ASSERT_EQ(o, str);
|
|
}
|
|
|
|
/* ----------------------------------------------------------------------------
|
|
* compression sinks
|
|
* --------------------------------------------------------------------------*/
|
|
|
|
TEST(makeCompressionSink, noneSinkDoesNothingToInput) {
|
|
StringSink strSink;
|
|
auto inputString = "slfja;sljfklsa;jfklsjfkl;sdjfkl;sadjfkl;sdjf;lsdfjsadlf";
|
|
auto sink = makeCompressionSink("none", strSink);
|
|
(*sink)(inputString);
|
|
sink->finish();
|
|
|
|
ASSERT_STREQ(strSink.s.c_str(), inputString);
|
|
}
|
|
|
|
TEST(makeCompressionSink, compressAndDecompress) {
|
|
auto inputString = "slfja;sljfklsa;jfklsjfkl;sdjfkl;sadjfkl;sdjf;lsdfjsadlf";
|
|
|
|
StringSink strSink;
|
|
auto sink = makeCompressionSink("bzip2", strSink);
|
|
(*sink)(inputString);
|
|
sink->finish();
|
|
|
|
StringSource strSource{strSink.s};
|
|
auto decompressionSource = makeDecompressionSource("bzip2", strSource);
|
|
|
|
ASSERT_STREQ(decompressionSource->drain().c_str(), inputString);
|
|
}
|
|
|
|
}
|