svoid test_tok_findBeginningOfJavaXTerm() {
  LS tok = javaTok([[ a~.b ]]);
  assertEqualsVerbose("a", get(tok, tok_findBeginningOfJavaXTerm(tok, indexOf(tok, "a"))));
  assertEqualsVerbose("a", get(tok, tok_findBeginningOfJavaXTerm(tok, indexOf(tok, "b"))));
}