gtest_assert_by_exception_test.cc

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//
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// Tests Google Test's assert-by-exception mode with exceptions enabled.

#include "gtest/gtest.h"

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdexcept>

class ThrowListener : public testing::EmptyTestEventListener {
  void OnTestPartResult(const testing::TestPartResult& result) override {
    if (result.type() == testing::TestPartResult::kFatalFailure) {
      throw testing::AssertionException(result);
    }
  }
};

// Prints the given failure message and exits the program with
// non-zero.  We use this instead of a Google Test assertion to
// indicate a failure, as the latter is been tested and cannot be
// relied on.
void Fail(const char* msg) {
  printf("FAILURE: %s\n", msg);
  fflush(stdout);
  exit(1);
}

static void AssertFalse() {
  ASSERT_EQ(2, 3) << "Expected failure";
}

// Tests that an assertion failure throws a subclass of
// std::runtime_error.
TEST(Test, Test) {
  // A successful assertion shouldn't throw.
  try {
    EXPECT_EQ(3, 3);
  } catch(...) {
    Fail("A successful assertion wrongfully threw.");
  }

  // A successful assertion shouldn't throw.
  try {
    EXPECT_EQ(3, 4);
  } catch(...) {
    Fail("A failed non-fatal assertion wrongfully threw.");
  }

  // A failed assertion should throw.
  try {
    AssertFalse();
  } catch(const testing::AssertionException& e) {
    if (strstr(e.what(), "Expected failure") != nullptr) throw;

    printf("%s",
           "A failed assertion did throw an exception of the right type, "
           "but the message is incorrect.  Instead of containing \"Expected "
           "failure\", it is:\n");
    Fail(e.what());
  } catch(...) {
    Fail("A failed assertion threw the wrong type of exception.");
  }
  Fail("A failed assertion should've thrown but didn't.");
}

int kTestForContinuingTest = 0;

TEST(Test, Test2) {
  kTestForContinuingTest = 1;
}

int main(int argc, char** argv) {
  testing::InitGoogleTest(&argc, argv);
  testing::UnitTest::GetInstance()->listeners().Append(new ThrowListener);

  int result = RUN_ALL_TESTS();
  if (result == 0) {
    printf("RUN_ALL_TESTS returned %d\n", result);
    Fail("Expected failure instead.");
  }

  if (kTestForContinuingTest == 0) {
    Fail("Should have continued with other tests, but did not.");
  }
  return 0;
}