recursive merge test

TEST:  function (){
    var a, b, result, expected;
    a = {
      a: 1,
      b: 2,
      c: {
        ca: 1,
        cb: 2
      }
    };
    b = {
      c: {
        cb: 5
      }
    };
    result = merge(a, b);
    expected = {
      a: 1,
      b: 2,
      c: {
        ca: 1,
        cb: 5
      }
    };
    return {
      result: result,
      expected: expected
    };
  }
EXPECTED:  { a: 1, b: 2, c: { ca: 1, cb: 5 } }
RESULT  :  { a: 1, b: 2, c: { cb: 5 } }