HandlerImpl handler = checkBasics(exec(s));
assertEquals(1, handler.selectors.size());
List<CssSelector> selectors = handler.selectors.get(0);
assertEquals(1, selectors.size());
CssSelector first = selectors.get(0);
assertTrue(first.getComponents().get(0) instanceof CssSimpleSelectorSequence);
CssSimpleSelectorSequence seq = (CssSimpleSelectorSequence)first.getComponents().get(0);
assertEquals("E1", seq.getComponents().get(0).toCssString());
assertTrue(first.getComponents().get(1) instanceof CssSelectorCombinator);
assertTrue(first.getComponents().get(2) instanceof CssSimpleSelectorSequence);
}