text: 
  seajs.config({
        map: [
          ['a.js', 'b.js']
          ,[/(b\.js)/i, 'sub/$1']
        ]
      });
  
  define(function(require) {
  
    var test = require('../../test');
    var a = require('./a');
  
    test.assert(a.name === 'b', 'The result of a.name is b');
    test.done();
  
  });
  