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Added TestCaseInfoHasher and tests. (#2394)

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Test case hashing includes tags and class name

As the hasher involves more code now, it was split out into its own file
and it got its own set of tests.

Closes #2304
This commit is contained in:
Daniel Feist 2022-03-31 16:46:41 +02:00 • committed by GitHub
parent 1a8a793178
commit 78e33ce51f
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24 changed files with 493 additions and 42 deletions
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31
src/catch2/internal/catch_test_case_registry_impl.cpp
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@ -16,38 +16,13 @@
#include <catch2/catch_test_case_info.hpp>
#include <catch2/catch_test_spec.hpp>
#include <catch2/internal/catch_move_and_forward.hpp>
#include <catch2/internal/catch_test_case_info_hasher.hpp>
#include <algorithm>
#include <set>
namespace Catch {
namespace {
struct TestHasher {
using hash_t = uint64_t;
explicit TestHasher( hash_t hashSuffix ):
m_hashSuffix( hashSuffix ) {}
uint64_t m_hashSuffix;
uint32_t operator()( TestCaseInfo const& t ) const {
// FNV-1a hash with multiplication fold.
const hash_t prime = 1099511628211u;
hash_t hash = 14695981039346656037u;
for (const char c : t.name) {
hash ^= c;
hash *= prime;
}
hash ^= m_hashSuffix;
hash *= prime;
const uint32_t low{ static_cast<uint32_t>(hash) };
const uint32_t high{ static_cast<uint32_t>(hash >> 32) };
return low * high;
}
};
} // end anonymous namespace
std::vector<TestCaseHandle> sortTests( IConfig const& config, std::vector<TestCaseHandle> const& unsortedTestCases ) {
switch (config.runOrder()) {
case TestRunOrder::Declared:
@ -66,9 +41,9 @@ namespace {
}
case TestRunOrder::Randomized: {
seedRng(config);
using TestWithHash = std::pair<TestHasher::hash_t, TestCaseHandle>;
using TestWithHash = std::pair<TestCaseInfoHasher::hash_t, TestCaseHandle>;
TestHasher h{ config.rngSeed() };
TestCaseInfoHasher h{ config.rngSeed() };
std::vector<TestWithHash> indexed_tests;
indexed_tests.reserve(unsortedTestCases.size());