@Test
public void testNextBinding() throws Exception {
when(mockValue.getString()).thenReturn("x");
final Binding binding = testObj.nextBinding();
assertTrue(binding.contains(Var.alloc("a")));
final Node a = binding.get(Var.alloc("a"));
assertEquals("x", a.getLiteralLexicalForm());
}
@Override
protected boolean _contains(String varName) {
return binding.contains(Var.alloc(varName));
}