ceph/src/spawn/test/dependency/googletest/googletest/test/gtest_test_macro_stack_footprint_test.cc

   1 // Copyright 2013, Google Inc.
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  28 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29
  30 //
  31 // Each TEST() expands to some static registration logic.  GCC puts all
  32 // such static initialization logic for a translation unit in a common,
  33 // internal function.  Since Google's build system restricts how much
  34 // stack space a function can use, there's a limit on how many TEST()s
  35 // one can put in a single C++ test file.  This test ensures that a large
  36 // number of TEST()s can be defined in the same translation unit.
  37
  38 #include "gtest/gtest.h"
  39
  40 // This macro defines 10 dummy tests.
  41 #define TEN_TESTS_(test_case_name) \
  42   TEST(test_case_name, T0) {} \
  43   TEST(test_case_name, T1) {} \
  44   TEST(test_case_name, T2) {} \
  45   TEST(test_case_name, T3) {} \
  46   TEST(test_case_name, T4) {} \
  47   TEST(test_case_name, T5) {} \
  48   TEST(test_case_name, T6) {} \
  49   TEST(test_case_name, T7) {} \
  50   TEST(test_case_name, T8) {} \
  51   TEST(test_case_name, T9) {}
  52
  53 // This macro defines 100 dummy tests.
  54 #define HUNDRED_TESTS_(test_case_name_prefix) \
  55   TEN_TESTS_(test_case_name_prefix ## 0) \
  56   TEN_TESTS_(test_case_name_prefix ## 1) \
  57   TEN_TESTS_(test_case_name_prefix ## 2) \
  58   TEN_TESTS_(test_case_name_prefix ## 3) \
  59   TEN_TESTS_(test_case_name_prefix ## 4) \
  60   TEN_TESTS_(test_case_name_prefix ## 5) \
  61   TEN_TESTS_(test_case_name_prefix ## 6) \
  62   TEN_TESTS_(test_case_name_prefix ## 7) \
  63   TEN_TESTS_(test_case_name_prefix ## 8) \
  64   TEN_TESTS_(test_case_name_prefix ## 9)
  65
  66 // This macro defines 1000 dummy tests.
  67 #define THOUSAND_TESTS_(test_case_name_prefix) \
  68   HUNDRED_TESTS_(test_case_name_prefix ## 0) \
  69   HUNDRED_TESTS_(test_case_name_prefix ## 1) \
  70   HUNDRED_TESTS_(test_case_name_prefix ## 2) \
  71   HUNDRED_TESTS_(test_case_name_prefix ## 3) \
  72   HUNDRED_TESTS_(test_case_name_prefix ## 4) \
  73   HUNDRED_TESTS_(test_case_name_prefix ## 5) \
  74   HUNDRED_TESTS_(test_case_name_prefix ## 6) \
  75   HUNDRED_TESTS_(test_case_name_prefix ## 7) \
  76   HUNDRED_TESTS_(test_case_name_prefix ## 8) \
  77   HUNDRED_TESTS_(test_case_name_prefix ## 9)
  78
  79 // Ensures that we can define 1000 TEST()s in the same translation
  80 // unit.
  81 THOUSAND_TESTS_(T)
  82
  83 int main(int argc, char **argv) {
  84   testing::InitGoogleTest(&argc, argv);
  85
  86   // We don't actually need to run the dummy tests - the purpose is to
  87   // ensure that they compile.
  88   return 0;
  89 }