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30 // Author: wan@google.com (Zhanyong Wan)
31 
32 // Tests Google Test's throw-on-failure mode with exceptions enabled.
33 
34 #include "gtest/gtest.h"
35 
36 #include <stdlib.h>
37 #include <stdio.h>
38 #include <string.h>
39 #include <stdexcept>
40 
41 // Prints the given failure message and exits the program with
42 // non-zero.  We use this instead of a Google Test assertion to
43 // indicate a failure, as the latter is been tested and cannot be
44 // relied on.
Fail(const char * msg)45 void Fail(const char* msg) {
46   printf("FAILURE: %s\n", msg);
47   fflush(stdout);
48   exit(1);
49 }
50 
51 // Tests that an assertion failure throws a subclass of
52 // std::runtime_error.
TestFailureThrowsRuntimeError()53 void TestFailureThrowsRuntimeError() {
54   testing::GTEST_FLAG(throw_on_failure) = true;
55 
56   // A successful assertion shouldn't throw.
57   try {
58     EXPECT_EQ(3, 3);
59   } catch(...) {
60     Fail("A successful assertion wrongfully threw.");
61   }
62 
63   // A failed assertion should throw a subclass of std::runtime_error.
64   try {
65     EXPECT_EQ(2, 3) << "Expected failure";
66   } catch(const std::runtime_error& e) {
67     if (strstr(e.what(), "Expected failure") != NULL)
68       return;
69 
70     printf("%s",
71            "A failed assertion did throw an exception of the right type, "
72            "but the message is incorrect.  Instead of containing \"Expected "
73            "failure\", it is:\n");
74     Fail(e.what());
75   } catch(...) {
76     Fail("A failed assertion threw the wrong type of exception.");
77   }
78   Fail("A failed assertion should've thrown but didn't.");
79 }
80 
main(int argc,char ** argv)81 int main(int argc, char** argv) {
82   testing::InitGoogleTest(&argc, argv);
83 
84   // We want to ensure that people can use Google Test assertions in
85   // other testing frameworks, as long as they initialize Google Test
86   // properly and set the thrown-on-failure mode.  Therefore, we don't
87   // use Google Test's constructs for defining and running tests
88   // (e.g. TEST and RUN_ALL_TESTS) here.
89 
90   TestFailureThrowsRuntimeError();
91   return 0;
92 }
93