@Override
public void setUp() throws Exception {
_vars = new HashMap<String, Node>();
_cc = new MockCompilerContext();
_runtime = new XPath20ExpressionRuntime();
_runtime.initialize(new HashMap());
_compiler = new XPath20ExpressionCompilerBPEL20();
_compiler.setCompilerContext(_cc);
_vardoc = DOMUtils.parse(getClass().getResourceAsStream("/xpath20/variables.xml"));