Googletest export

gtest: Add a flag to only set up/tear down test environments once when repeating

Currently when running a test multiple times using `--gtest_repeat` the global
test environment(s) are set up and torn down for each iteration of the test.
When checking for flakes in tests that have expensive dependencies that are set
up in the test environment (subprocesses, external dependencies, etc) this can
become expensive.

To support finding flakes in tests that fit into this category, where the setup
phase is expensive but each test case is fast, allow callers to specify via
`--gtest_recreate_environments_when_repeating=false` that the test environments
should only be set up once, for the first iteration, and only torn down once, on
the last iteration. This makes running a test with `--gtest_repeat=1000` a much
faster and more pleasant experience.

PiperOrigin-RevId: 382748942

1 files changed, 7 insertions, 0 deletions

diff --git a/googletest/src/gtest-internal-inl.h b/googletest/src/gtest-internal-inl.h
index 6d8cecb..59762c7 100644
--- a/googletest/src/gtest-internal-inl.h
+++ b/googletest/src/gtest-internal-inl.h
@@ -93,6 +93,8 @@ const char kPrintTimeFlag[] = "print_time";
 const char kPrintUTF8Flag[] = "print_utf8";
 const char kRandomSeedFlag[] = "random_seed";
 const char kRepeatFlag[] = "repeat";
+const char kRecreateEnvironmentsWhenRepeatingFlag[] =
+    "recreate_environments_when_repeating";
 const char kShuffleFlag[] = "shuffle";
 const char kStackTraceDepthFlag[] = "stack_trace_depth";
 const char kStreamResultToFlag[] = "stream_result_to";
@@ -176,6 +178,8 @@ class GTestFlagSaver {
     print_utf8_ = GTEST_FLAG(print_utf8);
     random_seed_ = GTEST_FLAG(random_seed);
     repeat_ = GTEST_FLAG(repeat);
+    recreate_environments_when_repeating_ =
+        GTEST_FLAG(recreate_environments_when_repeating);
     shuffle_ = GTEST_FLAG(shuffle);
     stack_trace_depth_ = GTEST_FLAG(stack_trace_depth);
     stream_result_to_ = GTEST_FLAG(stream_result_to);
@@ -200,6 +204,8 @@ class GTestFlagSaver {
     GTEST_FLAG(print_utf8) = print_utf8_;
     GTEST_FLAG(random_seed) = random_seed_;
     GTEST_FLAG(repeat) = repeat_;
+    GTEST_FLAG(recreate_environments_when_repeating) =
+        recreate_environments_when_repeating_;
     GTEST_FLAG(shuffle) = shuffle_;
     GTEST_FLAG(stack_trace_depth) = stack_trace_depth_;
     GTEST_FLAG(stream_result_to) = stream_result_to_;
@@ -224,6 +230,7 @@ class GTestFlagSaver {
   bool print_utf8_;
   int32_t random_seed_;
   int32_t repeat_;
+  bool recreate_environments_when_repeating_;
   bool shuffle_;
   int32_t stack_trace_depth_;
   std::string stream_result_to_;