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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 class PrematureExitTest : public Test {
48 public:
49 // Returns true iff the given file exists.
FileExists(const char * filepath)50 static bool FileExists(const char* filepath) {
51 StatStruct stat;
52 return Stat(filepath, &stat) == 0;
53 }
54
55 protected:
PrematureExitTest()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.
PrematureExitFileExists() const66 bool PrematureExitFileExists() const {
67 return FileExists(premature_exit_file_path_);
68 }
69
70 const char* premature_exit_file_path_;
71 };
72
73 typedef 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.
TEST_F(PrematureExitDeathTest,FileExistsDuringExecutionOfDeathTest)80 TEST_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.
TEST_F(PrematureExitTest,PrematureExitFileExistsDuringTestExecution)98 TEST_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
main(int argc,char ** argv)110 int 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