I am trying to create unit test for durable function activity using nodejs. But didn't find any documentation regarding that or anything. And where I am lacking is that I don't know what will be the context to pass while creating test case. Any help will be appreciated. Thanks in advance!!!

module.exports   = {
    // log: jest.fn(),
    log: (function () {
      let main = <any>jest.fn((message) => message);
      let info = jest.fn((message) => message);
      main.info = info;
      let error = jest.fn((message) => message);
      main.error = error
      return main;
    })(),
    bindingData: (function () {
      let main = <any>jest.fn((message) => message);
      let info = jest.fn((message) => message);
      main.info = info;
      let error = jest.fn((message) => message);
      main.error = error;
      return main;
    })()
  };

I am passing this context but getting error related to context.bindingData