javascript - 从包装库调用单元测试库

Question

我正在围绕pinojs中的 javascript 库构建一个包装器。我想知道如何编写单元测试来验证其中的info函数是否pino被实际调用。

这是一个代码片段

const { logger } = require(`../../../lib/index`);

describe(`when logger is configured with pino-pretty`, () => {
beforeEach(() => {
  myAppLogger = logger({
    prettyPrint: true
  });
});

it(`then pino info method is called on pino instance`, () => {
  const pinoSpy = sinon.spy(pino, 'info');
  myAppLogger.info('info message');
  expect(pinoSpy).to.have.been.called;
  expect(pinoSpy).to.not.throw();
});
});

wheremyAppLogger只是一个实例pino

pino(options, stream).child(props);