Allowing the user to change default mock generator behaviour

[mageekguy]

By default, a mock has the same interface and the same behavior than it's model, that is to say if foo::bar() return true, \mock\foo::bar() return true too.
It must be interesting to allow the user to change this, i.e. a call to \mock\foo::bar() return by default null instead of true.
The idea is to define \mageekguy\atoum\mock\generator::mockAllMethods() and \mageekguy\atoum\mock\generator::notMockAllMethods() to do that :

<?php

public function testSomething()
{
   /* ... */
   $this->mockGenerator->mockAllMethods();
   $mock = new \mock\foo();
   var_dump($mock->bar(); // NULL

   $this->mockGenerator->notMockAllMethods();
   $otherMock = new \mock\foo();
   var_dump($otherMock->bar(); // TRUE
   /* ... */
}