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gtest.cc: run tests within a test suite in a deterministic order.

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Ensure that tests are run in the order specified in the source code, even if
they are registered manually using RegisterTest. There should be no behavior
change for the common case.

PiperOrigin-RevId: 520729483
Change-Id: I400c78400c6929fccae0676214d993251f31888f
This commit is contained in:
Aaron Jacobs 2023-03-30 13:34:34 -07:00 committed by Copybara-Service
parent 0cd05c6ea9
commit b5fd99bbd5
1 changed files with 20 additions and 0 deletions
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20
googletest/src/gtest.cc
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@ -44,6 +44,7 @@
#include <chrono> // NOLINT
#include <cmath>
#include <cstdint>
#include <cstring>
#include <initializer_list>
#include <iomanip>
#include <ios>
@ -2981,6 +2982,25 @@ void TestSuite::Run() {
TestEventListener* repeater = UnitTest::GetInstance()->listeners().repeater();
// Ensure our tests are in a deterministic order.
//
// We do this by sorting lexicographically on (file, line number), providing
// an order matching what the user can see in the source code.
//
// In the common case the line number comparison shouldn't be necessary,
// because the registrations made by the TEST macro are executed in order
// within a translation unit. But this is not true of the manual registration
// API, and in more exotic scenarios a single file may be part of multiple
// translation units.
std::stable_sort(test_info_list_.begin(), test_info_list_.end(),
[](const TestInfo* const a, const TestInfo* const b) {
if (const int result = std::strcmp(a->file(), a->file())) {
return result < 0;
}
return a->line() < b->line();
});
// Call both legacy and the new API
repeater->OnTestSuiteStart(*this);
// Legacy API is deprecated but still available