如何使用Jest测试一个数组是否包含来自另一个数组的值？

Question

我有一个数组：

   Const domesticAnimals = ['Chicken','lama','Donkey']
   Const wildAnimals =['lama','lion','elephant']

如何测试是否在wildAnimals数组中列出了任何domesticAnimals？

我试过了

test('test If any wild animal is in the domestic animal list', async() =>{
expect(domesticAnimals ).toContain('lama')
}) //works perfectly

test('test If any wild animal is in the domestic animal list', async() =>{
expect(domesticAnimals ).toContain(wildAnimals) // does not work
})

Answer 1

实际上有两个数组：

const domesticAnimals = ['Chicken','lama','Donkey'];
const wildAnimals =['lama','lion','elephant'];

测试一个数组是否包含来自另一个数组的值的简单JS方法是：

domesticAnimals.some(domesticAnimal => wildAnimals.includes(domesticAnimal));

因此，如果要对此进行测试，应该是：

test('test If any wild animal is in the domestic animal list', () =>{
    expect(domesticAnimals.some(
        domesticAnimal => wildAnimals.includes(domesticAnimal)
    )).toBe(true);
});

另外，您将测试函数标记为async，但实际上没有await，因此async是多余的。