Jasmine Samples

jasmine-samples.ts

import Spy = jasmine.Spy;

spyOn(exchange['client'], 'candles').and.callFake(() => {
  const candlesSpy = (exchange['client'].candles as Spy);
  switch (candlesSpy.calls.count()) {
    case 1:
      return require('../test/fixtures/binance/candles/BTC-USDT-1m-500-1561500000000.json');
    case 2:
      return require('../test/fixtures/binance/candles/BTC-USDT-1m-500-1561530000000.json');
    default:
      return require('../test/fixtures/binance/candles/BTC-USDT-1m-500-1561560000000.json');
  }
});

// Check arguments that has been used to call a spy

const eventSpy = jasmine.createSpy('onCandle');
expect(eventSpy).toHaveBeenCalledTimes(1);
const emittedCandle: Object = eventSpy.calls.mostRecent().args.pop();
expect(emittedCandle.a).toEqual('a');
expect(emittedCandle.b).toEqual('b');

// Alternative

const eventSpy = jasmine.createSpy('onCandle');
expect(orderSpy).toHaveBeenCalledWith({
  a: 'a',
  b: 'b',
});