ls-standard-library/test/lib/googletest-1.11.0/googletest/src/gtest_main.cc

// Copyright 2006, Google Inc.
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// modification, are permitted provided that the following conditions are
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//
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// notice, this list of conditions and the following disclaimer.
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#include <cstdio>
#include "gtest/gtest.h"

#if GTEST_OS_ESP8266 || GTEST_OS_ESP32
#if GTEST_OS_ESP8266
extern "C" {
#endif
void setup() {
  testing::InitGoogleTest();
}

void loop() { RUN_ALL_TESTS(); }

#if GTEST_OS_ESP8266
}
#endif

#else

GTEST_API_ int main(int argc, char **argv) {
  printf("Running main() from %s\n", __FILE__);
  testing::InitGoogleTest(&argc, argv);
  return RUN_ALL_TESTS();
}
#endif