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Systematize characterization tests a bit more

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Deduplicating code moreover enforcing the pattern means:

 - It is easier to write new characterization tests because less boilerplate

 - It is harder to mess up new tests because there are fewer places to
   make mistakes.

Co-authored-by: Jacek Galowicz <jacek@galowicz.de>
This commit is contained in:
John Ericson 2023-11-01 11:15:21 -04:00
parent 1e61c007be
commit b107431816
6 changed files with 183 additions and 183 deletions
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61
src/libstore/tests/protocol.hh
View file

@ -7,12 +7,11 @@
namespace nix {
template<class Proto, const char * protocolDir>
class ProtoTest : public LibStoreTest
class ProtoTest : public CharacterizationTest, public LibStoreTest
{
protected:
Path unitTestData = getUnitTestData() + "/libstore/" + protocolDir;
Path goldenMaster(std::string_view testStem) {
Path goldenMaster(std::string_view testStem) const override {
return unitTestData + "/" + testStem + ".bin";
}
};
@ -25,18 +24,11 @@ public:
* Golden test for `T` reading
*/
template<typename T>
void readTest(PathView testStem, typename Proto::Version version, T value)
void readProtoTest(PathView testStem, typename Proto::Version version, T expected)
{
if (testAccept())
{
GTEST_SKIP() << cannotReadGoldenMaster;
}
else
{
auto expected = readFile(ProtoTest<Proto, protocolDir>::goldenMaster(testStem));
CharacterizationTest::readTest(testStem, [&](const auto & encoded) {
T got = ({
StringSource from { expected };
StringSource from { encoded };
Proto::template Serialise<T>::read(
*LibStoreTest::store,
typename Proto::ReadConn {
@ -45,47 +37,36 @@ public:
});
});
ASSERT_EQ(got, value);
}
ASSERT_EQ(got, expected);
});
}
/**
* Golden test for `T` write
*/
template<typename T>
void writeTest(PathView testStem, typename Proto::Version version, const T & value)
void writeProtoTest(PathView testStem, typename Proto::Version version, const T & decoded)
{
auto file = ProtoTest<Proto, protocolDir>::goldenMaster(testStem);
StringSink to;
Proto::write(
*LibStoreTest::store,
typename Proto::WriteConn {
.to = to,
.version = version,
},
value);
if (testAccept())
{
createDirs(dirOf(file));
writeFile(file, to.s);
GTEST_SKIP() << updatingGoldenMaster;
}
else
{
auto expected = readFile(file);
ASSERT_EQ(to.s, expected);
}
CharacterizationTest::writeTest(testStem, [&]() {
StringSink to;
Proto::template Serialise<T>::write(
*LibStoreTest::store,
typename Proto::WriteConn {
.to = to,
.version = version,
},
decoded);
return std::move(to.s);
});
}
};
#define VERSIONED_CHARACTERIZATION_TEST(FIXTURE, NAME, STEM, VERSION, VALUE) \
TEST_F(FIXTURE, NAME ## _read) { \
readTest(STEM, VERSION, VALUE); \
readProtoTest(STEM, VERSION, VALUE); \
} \
TEST_F(FIXTURE, NAME ## _write) { \
writeTest(STEM, VERSION, VALUE); \
writeProtoTest(STEM, VERSION, VALUE); \
}
}