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#include <nlohmann/json.hpp>
#include <gtest/gtest.h>
#include "tests/libstore.hh"
#include "characterization.hh"
namespace nix {
template<class Proto, const char * protocolDir>
class ProtoTest : public LibStoreTest
{
/**
* Read this as simply `using S = Inner::Serialise;`.
*
* See `LengthPrefixedProtoHelper::S` for the same trick, and its
* rationale.
*/
template<typename U> using S = typename Proto::template Serialise<U>;
public:
Path unitTestData = getUnitTestData() + "/libstore/" + protocolDir;
Path goldenMaster(std::string_view testStem) {
return unitTestData + "/" + testStem + ".bin";
}
/**
* Golden test for `T` reading
*/
template<typename T>
void readTest(PathView testStem, T value)
{
if (testAccept())
{
GTEST_SKIP() << "Cannot read golden master because another test is also updating it";
}
else
{
auto expected = readFile(goldenMaster(testStem));
T got = ({
StringSource from { expected };
S<T>::read(
*store,
typename Proto::ReadConn { .from = from });
});
ASSERT_EQ(got, value);
}
}
/**
* Golden test for `T` write
*/
template<typename T>
void writeTest(PathView testStem, const T & value)
{
auto file = goldenMaster(testStem);
StringSink to;
Proto::write(
*store,
typename Proto::WriteConn { .to = to },
value);
if (testAccept())
{
createDirs(dirOf(file));
writeFile(file, to.s);
GTEST_SKIP() << "Updating golden master";
}
else
{
auto expected = readFile(file);
ASSERT_EQ(to.s, expected);
}
}
};
#define CHARACTERIZATION_TEST(FIXTURE, NAME, STEM, VALUE) \
TEST_F(FIXTURE, NAME ## _read) { \
readTest(STEM, VALUE); \
} \
TEST_F(FIXTURE, NAME ## _write) { \
writeTest(STEM, VALUE); \
}
}
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