svoid test_formatWithFragments() {
  assertEqualsVerbose(Fragment("hello"), formatWithFragments("hello"));
  class Test {}
  new Test o;
  new Test x;
  assertEqualsVerbose(ll(Fragment("hello"), o), formatWithFragments("hello *", o));
  assertEqualsVerbose(ll(o, Fragment("world")), formatWithFragments("* world", o));
  assertEqualsVerbose(ll(Fragment("hello"), o, Fragment("world bla"), x), formatWithFragments("hello * world bla *", o, x));
}