beforeEach(function() {
      this.addMatchers({
          toExactlyMatch: function(expected) {
              var a1, a2,
                  l, i,
                  key,
                  actual = this.actual;
              
              var getKeys = function(o) {
                  var a = [];
                  for(key in o) {
                      if(o.hasOwnProperty(key)) {
                          a.push(key);
                      }
                  }
                  return a;
              }
              a1 = getKeys(actual);
              a2 = getKeys(expected);
              
              l = a1.length;
              if(l !== a2.length) {
                  return false;
              }
              for(i = 0; i < l; i++) {
                  key = a1[i];
                  expect(key).toEqual(a2[i]);
                  expect(actual[key]).toEqual(expected[key]);
              }
              
              return true;
          }
      })
  });