Question

告诉我，如何测试distanceCalculation（）方法？我想用精确指定的值检查测试结果的准确性。如何在Jest中测试Typescript的方法？这是一个测试任务，我正在学习。

class Car {
  amountOfFuel: number;
  fuelСonsumption: number;

    constructor(carAmountOfFuel: number,
      carFuelСonsumption: number) {
        this.amountOfFuel = carAmountOfFuel;
        this.fuelСonsumption = carFuelСonsumption;
      }

      distanceСalculation(): number {
        return (this.amountOfFuel / this.fuelСonsumption)*100;
    }
}

export class Bentley extends Car {
  }

export class Zhiguli extends Car {
  }

测试代码

import { Bentley, Zhiguli } from './sum'

test("property check Bentley", () => {
  let car1 = new Bentley(90, 12);

  expect(car1).toHaveProperty('amountOfFuel',90);
  expect(car1).toHaveProperty('fuelСonsumption', 12);
});

test("property check Zhiguli", () => {
  let car2 = new Zhiguli(40, 10);

  expect(car2).toHaveProperty('amountOfFuel',40);
  expect(car2).toHaveProperty('fuelСonsumption', 10);
});

Answer 1

如果应该从类外部访问distanceCalculation，请确保将其标记为公开。

您可以调用它，并从测试中检查返回的值，如下所示：

cv2.xfeatures2d.matchGMS

如何在打字稿中测试方法？

1 个答案: