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Єськіна Анна Андріївна
Asked:2022-10-05 22:26:16 +0000 UTC2022-10-05 22:26:16 +0000 UTC

如何在 Jest 中检查对象是否相等？

  • 772

我开始学习 Jest 并完成作业。一个不跳过。我不明白如何实现它。

带来了我的代码

/**
 * Write test to check that objects equal after
 * calling function boo
 */

const obj1 = {
  name: "Test",
};

const obj2 = {
  name: "John",
};
const boo = (obj1, obj2) => {
  obj1.name = obj2.name;
};

describe("Practicing with tests", () => {
  it("objects equal after calling function boo", () => {
    boo(obj1, obj2);
    console.log(obj1 === obj2);
  });
}); // Modify this
javascript

2 个回答

  1. Best Answer

    利用expect

    该方法toEqual检查对象的属性，比较===只是对这些对象的引用

    阅读更多

    const obj1 = {
  name: "Test",
};

const obj2 = {
  name: "John",
};

const boo = (obj1, obj2) => {
  obj1.name = obj2.name;
};

describe("Practicing with tests", () => {
  it("objects equal after calling function boo", () => {
    boo(obj1, obj2)
    expect(obj1).toEqual(obj2)
  });
});

    您也可以只比较感兴趣的财产

    expect(obj1.name).toBe(obj2.name)
    • 0

  2. 需要 var 而不是 const：

    var obj1 = {
  name: "Test",
};

var obj2 = {
  name: "John",
};

    和：

    describe("Practicing with tests", () => {
  it("objects equal after calling function boo", () => {
    obj1 = obj2; // оба объекта одинаковы
    console.log(obj1 === obj2);
  });
});

    或者，如您的情况：

    const obj1 = {
  name: "Test",
};

const obj2 = {
  name: "John",
};
const boo = (obj1, obj2) => {
  obj1.name = obj2.name;
};

describe("Practicing with tests", () => {
  it("objects equal after calling function boo", () => {
    boo(obj1, obj2);
    console.log(obj1.name === obj2.name); // <<<-------
  });
});
    • -1

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