sinon：应该手动恢复模拟存根吗？

Question

我的代码：

it('should delegate', sinon.test(function() {
  const stub = sinon.stub(this.Ext, 'process'); 
  // Question 1: should restore stub manually here? 
  // Question 2: what 'this' refer here?
}));

我不确定上面的代码是否正常。从this，可能以下两段代码更好？

it('should restore all mocks stubs and spies between tests', function() {
  sinon.stub(some, 'method'); 
  // Question 3: How to restore all mocks stubs and spies between tests?
  // Question 4: what 'this' refer here?
}

it("should automatically restore all mocks stubs and spies", sinon.test(function() {
  this.stub(some, 'method'); 
  // Question 5: what 'this' refer here? test context?
}));

我是sinon的新手。上述3个代码中有5个问题。欢迎任何评论。感谢