in auth/testapp/src/common_main.cc [285:293]
void CompleteTest(const char* test_name, int min_state_changes,
int max_state_changes) {
const bool success = min_state_changes <= num_state_changes_ &&
num_state_changes_ <= max_state_changes;
LogMessage("%sAuthStateListener called %d time%s on %s.",
success ? "" : "ERROR: ", num_state_changes_,
num_state_changes_ == 1 ? "" : "s", test_name);
num_state_changes_ = 0;
}