set = new ItemSet(grammar, firstsets);
set.addItem(0, 1, eof);
result = new ItemSet(grammar, firstsets);
result.addItem(0, 1, eof);
result.addItem(1, 0, eof);
result.addItem(2, 0, eof);
assertEquals("Test if sets are equal", result, set.closure());
set = new ItemSet(grammar, firstsets);