message: Add unit test for atom_from_string
diff: @@ -142,4 +142,9 @@ CAF_TEST(request_atom_constants) {
  );
  }
  +CAF_TEST(runtime_conversion) {
  + CAF_CHECK_EQUAL(atom("foo"), atom_from_string("foo"));
  + CAF_CHECK_EQUAL(atom(""), atom_from_string("tooManyCharacters"));
  +}
  +
  CAF_TEST_FIXTURE_SCOPE_END()
  