github.com/jlmucb/cloudproxy@v0.0.0-20170830161738-b5aa0b619bc4/src/third_party/googlemock/gtest/test/gtest_premature_exit_test.cc (about)

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    29  //
    30  // Author: wan@google.com (Zhanyong Wan)
    31  //
    32  // Tests that Google Test manipulates the premature-exit-detection
    33  // file correctly.
    34  
    35  #include <stdio.h>
    36  
    37  #include "gtest/gtest.h"
    38  
    39  using ::testing::InitGoogleTest;
    40  using ::testing::Test;
    41  using ::testing::internal::posix::GetEnv;
    42  using ::testing::internal::posix::Stat;
    43  using ::testing::internal::posix::StatStruct;
    44  
    45  namespace {
    46  
    47  // Is the TEST_PREMATURE_EXIT_FILE environment variable expected to be
    48  // set?
    49  const bool kTestPrematureExitFileEnvVarShouldBeSet = false;
    50  
    51  class PrematureExitTest : public Test {
    52   public:
    53    // Returns true iff the given file exists.
    54    static bool FileExists(const char* filepath) {
    55      StatStruct stat;
    56      return Stat(filepath, &stat) == 0;
    57    }
    58  
    59   protected:
    60    PrematureExitTest() {
    61      premature_exit_file_path_ = GetEnv("TEST_PREMATURE_EXIT_FILE");
    62  
    63      // Normalize NULL to "" for ease of handling.
    64      if (premature_exit_file_path_ == NULL) {
    65        premature_exit_file_path_ = "";
    66      }
    67    }
    68  
    69    // Returns true iff the premature-exit file exists.
    70    bool PrematureExitFileExists() const {
    71      return FileExists(premature_exit_file_path_);
    72    }
    73  
    74    const char* premature_exit_file_path_;
    75  };
    76  
    77  typedef PrematureExitTest PrematureExitDeathTest;
    78  
    79  // Tests that:
    80  //   - the premature-exit file exists during the execution of a
    81  //     death test (EXPECT_DEATH*), and
    82  //   - a death test doesn't interfere with the main test process's
    83  //     handling of the premature-exit file.
    84  TEST_F(PrematureExitDeathTest, FileExistsDuringExecutionOfDeathTest) {
    85    if (*premature_exit_file_path_ == '\0') {
    86      return;
    87    }
    88  
    89    EXPECT_DEATH_IF_SUPPORTED({
    90        // If the file exists, crash the process such that the main test
    91        // process will catch the (expected) crash and report a success;
    92        // otherwise don't crash, which will cause the main test process
    93        // to report that the death test has failed.
    94        if (PrematureExitFileExists()) {
    95          exit(1);
    96        }
    97      }, "");
    98  }
    99  
   100  // Tests that TEST_PREMATURE_EXIT_FILE is set where it's expected to
   101  // be set.
   102  TEST_F(PrematureExitTest, TestPrematureExitFileEnvVarIsSet) {
   103    if (kTestPrematureExitFileEnvVarShouldBeSet) {
   104      const char* const filepath = GetEnv("TEST_PREMATURE_EXIT_FILE");
   105      ASSERT_TRUE(filepath != NULL);
   106      ASSERT_NE(*filepath, '\0');
   107    }
   108  }
   109  
   110  // Tests that the premature-exit file exists during the execution of a
   111  // normal (non-death) test.
   112  TEST_F(PrematureExitTest, PrematureExitFileExistsDuringTestExecution) {
   113    if (*premature_exit_file_path_ == '\0') {
   114      return;
   115    }
   116  
   117    EXPECT_TRUE(PrematureExitFileExists())
   118        << " file " << premature_exit_file_path_
   119        << " should exist during test execution, but doesn't.";
   120  }
   121  
   122  }  // namespace
   123  
   124  int main(int argc, char **argv) {
   125    InitGoogleTest(&argc, argv);
   126    const int exit_code = RUN_ALL_TESTS();
   127  
   128    // Test that the premature-exit file is deleted upon return from
   129    // RUN_ALL_TESTS().
   130    const char* const filepath = GetEnv("TEST_PREMATURE_EXIT_FILE");
   131    if (filepath != NULL && *filepath != '\0') {
   132      if (PrematureExitTest::FileExists(filepath)) {
   133        printf(
   134            "File %s shouldn't exist after the test program finishes, but does.",
   135            filepath);
   136        return 1;
   137      }
   138    }
   139  
   140    return exit_code;
   141  }