test_stream: setup prologue and epilogue as fake tests in the suite

Standard old test functions, but they don't call TEST_INIT or
TEST_PASSED.  They're placed at the start and at the end of the test
array.

Those macros just do printing anyway, so they're not necessary.

test/test.h

@@ -16,6 +16,12 @@
 
 #define TEST_INIT()   printf("\t[%s]: Running...\n", __func__)
 #define TEST_PASSED() printf("\t[%s]: Passed\n", __func__)
+#define TEST_INFO(...)   \
+  do                     \
+  {                      \
+    printf("\tINFO: ");  \
+    printf(__VA_ARGS__); \
+  } while (0);
 
 #if TEST_VERBOSE
 #define TEST(COND, ...)                  \