tool/mbed/mbed-sdk/libraries/tests/mbed/dev_null/main.cpp

   1 #include "mbed.h"
   2 #include "test_env.h"
   3
   4 class DevNull : public Stream {
   5 public:
   6     DevNull(const char *name = NULL) : Stream(name) {}
   7
   8 protected:
   9     virtual int _getc() {
  10         return 0;
  11     }
  12     virtual int _putc(int c) {
  13         return c;
  14     }
  15 };
  16
  17 DevNull null("null");
  18
  19 int main() {
  20     MBED_HOSTTEST_TIMEOUT(20);
  21     MBED_HOSTTEST_SELECT(dev_null_auto);
  22     MBED_HOSTTEST_DESCRIPTION(stdout redirected to dev null);
  23     MBED_HOSTTEST_START("EXAMPLE_1");
  24
  25     printf("MBED: re-routing stdout to /null\r\n");
  26     freopen("/null", "w", stdout);
  27     printf("MBED: printf redirected to /null\r\n");   // This shouldn't appear
  28     // If failure message can be seen test should fail :)
  29     MBED_HOSTTEST_RESULT(false);   // This is 'false' on purpose
  30 }