public void testUnaryNegativeWithSpace() {
    ParserConfiguration conf = new ParserConfiguration();
    ParserContext pctx = new ParserContext( conf );
    pctx.setStrictTypeEnforcement(true);
    pctx.setStrongTyping(true);
    pctx.addInput("value", int.class);
    Map vars = new HashMap() {{ put("value", 42); }};
    assertEquals(-42, MVEL.executeExpression(MVEL.compileExpression("- value", pctx), vars));
  }