tor-browser

The Tor Browser
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gtest_premature_exit_test.cc (4283B)

      1 // Copyright 2013, Google Inc.
      2 // All rights reserved.
      3 //
      4 // Redistribution and use in source and binary forms, with or without
      5 // modification, are permitted provided that the following conditions are
      6 // met:
      7 //
      8 //     * Redistributions of source code must retain the above copyright
      9 // notice, this list of conditions and the following disclaimer.
     10 //     * Redistributions in binary form must reproduce the above
     11 // copyright notice, this list of conditions and the following disclaimer
     12 // in the documentation and/or other materials provided with the
     13 // distribution.
     14 //     * Neither the name of Google Inc. nor the names of its
     15 // contributors may be used to endorse or promote products derived from
     16 // this software without specific prior written permission.
     17 //
     18 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29 
     30 //
     31 // Tests that Google Test manipulates the premature-exit-detection
     32 // file correctly.
     33 
     34 #include <stdio.h>
     35 
     36 #include "gtest/gtest.h"
     37 
     38 using ::testing::InitGoogleTest;
     39 using ::testing::Test;
     40 using ::testing::internal::posix::GetEnv;
     41 using ::testing::internal::posix::Stat;
     42 using ::testing::internal::posix::StatStruct;
     43 
     44 namespace {
     45 
     46 class PrematureExitTest : public Test {
     47 public:
     48  // Returns true if and only if the given file exists.
     49  static bool FileExists(const char* filepath) {
     50    StatStruct stat;
     51    return Stat(filepath, &stat) == 0;
     52  }
     53 
     54 protected:
     55  PrematureExitTest() {
     56    premature_exit_file_path_ = GetEnv("TEST_PREMATURE_EXIT_FILE");
     57 
     58    // Normalize NULL to "" for ease of handling.
     59    if (premature_exit_file_path_ == nullptr) {
     60      premature_exit_file_path_ = "";
     61    }
     62  }
     63 
     64  // Returns true if and only if the premature-exit file exists.
     65  bool PrematureExitFileExists() const {
     66    return FileExists(premature_exit_file_path_);
     67  }
     68 
     69  const char* premature_exit_file_path_;
     70 };
     71 
     72 typedef PrematureExitTest PrematureExitDeathTest;
     73 
     74 // Tests that:
     75 //   - the premature-exit file exists during the execution of a
     76 //     death test (EXPECT_DEATH*), and
     77 //   - a death test doesn't interfere with the main test process's
     78 //     handling of the premature-exit file.
     79 TEST_F(PrematureExitDeathTest, FileExistsDuringExecutionOfDeathTest) {
     80  if (*premature_exit_file_path_ == '\0') {
     81    return;
     82  }
     83 
     84  EXPECT_DEATH_IF_SUPPORTED({
     85      // If the file exists, crash the process such that the main test
     86      // process will catch the (expected) crash and report a success;
     87      // otherwise don't crash, which will cause the main test process
     88      // to report that the death test has failed.
     89      if (PrematureExitFileExists()) {
     90        exit(1);
     91      }
     92    }, "");
     93 }
     94 
     95 // Tests that the premature-exit file exists during the execution of a
     96 // normal (non-death) test.
     97 TEST_F(PrematureExitTest, PrematureExitFileExistsDuringTestExecution) {
     98  if (*premature_exit_file_path_ == '\0') {
     99    return;
    100  }
    101 
    102  EXPECT_TRUE(PrematureExitFileExists())
    103      << " file " << premature_exit_file_path_
    104      << " should exist during test execution, but doesn't.";
    105 }
    106 
    107 }  // namespace
    108 
    109 int main(int argc, char **argv) {
    110  InitGoogleTest(&argc, argv);
    111  const int exit_code = RUN_ALL_TESTS();
    112 
    113  // Test that the premature-exit file is deleted upon return from
    114  // RUN_ALL_TESTS().
    115  const char* const filepath = GetEnv("TEST_PREMATURE_EXIT_FILE");
    116  if (filepath != nullptr && *filepath != '\0') {
    117    if (PrematureExitTest::FileExists(filepath)) {
    118      printf(
    119          "File %s shouldn't exist after the test program finishes, but does.",
    120          filepath);
    121      return 1;
    122    }
    123  }
    124 
    125  return exit_code;
    126 }