QUnit: multiple async tests in one test

qunit-async-bad.js

// Don't do this! Why? It will wait for two seconds, regardless.

asyncTest( "multiple async w/ setTimeout", function() {
  expect( 4 );
 
  var url = "http://jsfiddle.net/echo/jsonp/?callback=?";
 
  $.getJSON( url, { a: 1 }, function( data ) {
    ok( data, "data is returned from the server" );
    equal( data.a, "1", "the value of data.a should be 1" );
  });
 
  $.getJSON( url, { b: 2 }, function( data ) {
    ok( data, "data is returned from the server" );
    equal( data.b, "2", "the value of data.b should be 2" );
  });
 
  setTimeout( start, 2000 );
});

qunit-async-good.js

// While the timeout is set for two seconds, the test may continue before that.

test( "multiple async w/ counter", function() {
  expect( 4 );
 
  stop( 2000 );
 
  // Only call start() when counter is 0.
  var counter = 2;
  function done() { --counter || start(); }
 
  var url = "http://jsfiddle.net/echo/jsonp/?callback=?";
 
  $.getJSON( url, { a: 1 }, function( data ) {
    ok( data, "data is returned from the server" );
    equal( data.a, "1", "the value of data.a should be 1" );
    done();
  });
 
  $.getJSON( url, { b: 2 }, function( data ) {
    ok( data, "data is returned from the server" );
    equal( data.b, "2", "the value of data.b should be 2" );
    done();
  });
});

why not simply use stop(2) and replace done(); by start(); ?

the test will wait to have the 2 starts ready to execute tu run...