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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
39using ::testing::InitGoogleTest;
40using ::testing::Test;
41using ::testing::internal::posix::GetEnv;
42using ::testing::internal::posix::Stat;
43using ::testing::internal::posix::StatStruct;
44
45namespace {
46
47class PrematureExitTest : public Test {
48 public:
49  // Returns true iff the given file exists.
50  static bool FileExists(const char* filepath) {
51    StatStruct stat;
52    return Stat(filepath, &stat) == 0;
53  }
54
55 protected:
56  PrematureExitTest() {
57    premature_exit_file_path_ = GetEnv("TEST_PREMATURE_EXIT_FILE");
58
59    // Normalize NULL to "" for ease of handling.
60    if (premature_exit_file_path_ == NULL) {
61      premature_exit_file_path_ = "";
62    }
63  }
64
65  // Returns true iff the premature-exit file exists.
66  bool PrematureExitFileExists() const {
67    return FileExists(premature_exit_file_path_);
68  }
69
70  const char* premature_exit_file_path_;
71};
72
73typedef PrematureExitTest PrematureExitDeathTest;
74
75// Tests that:
76//   - the premature-exit file exists during the execution of a
77//     death test (EXPECT_DEATH*), and
78//   - a death test doesn't interfere with the main test process's
79//     handling of the premature-exit file.
80TEST_F(PrematureExitDeathTest, FileExistsDuringExecutionOfDeathTest) {
81  if (*premature_exit_file_path_ == '\0') {
82    return;
83  }
84
85  EXPECT_DEATH_IF_SUPPORTED({
86      // If the file exists, crash the process such that the main test
87      // process will catch the (expected) crash and report a success;
88      // otherwise don't crash, which will cause the main test process
89      // to report that the death test has failed.
90      if (PrematureExitFileExists()) {
91        exit(1);
92      }
93    }, "");
94}
95
96// Tests that the premature-exit file exists during the execution of a
97// normal (non-death) test.
98TEST_F(PrematureExitTest, PrematureExitFileExistsDuringTestExecution) {
99  if (*premature_exit_file_path_ == '\0') {
100    return;
101  }
102
103  EXPECT_TRUE(PrematureExitFileExists())
104      << " file " << premature_exit_file_path_
105      << " should exist during test execution, but doesn't.";
106}
107
108}  // namespace
109
110int main(int argc, char **argv) {
111  InitGoogleTest(&argc, argv);
112  const int exit_code = RUN_ALL_TESTS();
113
114  // Test that the premature-exit file is deleted upon return from
115  // RUN_ALL_TESTS().
116  const char* const filepath = GetEnv("TEST_PREMATURE_EXIT_FILE");
117  if (filepath != NULL && *filepath != '\0') {
118    if (PrematureExitTest::FileExists(filepath)) {
119      printf(
120          "File %s shouldn't exist after the test program finishes, but does.",
121          filepath);
122      return 1;
123    }
124  }
125
126  return exit_code;
127}
128