How to use the should function from chai

chai.should is a chaining style assertion library that extends Object.prototype with a should property.

How does chai.should work?

chai.should is a method in the Chai assertion library that extends the Object prototype to enable chaining assertions in natural language. When used, it sets the should property of all objects to a Should object, which is used to chain assertions. The Should object contains a large number of methods that can be used to make assertions about objects, including properties, types, and values.

Ai Example

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const chai = require("chai");
const should = chai.should();

describe("chai.should example", function () {
  it("should assert a value is equal to another value", function () {
    const actualValue = 42;
    const expectedValue = 42;
    actualValue.should.equal(expectedValue);
  });

  it("should assert an array includes a particular value", function () {
    const arr = [1, 2, 3];
    arr.should.include(2);
  });

  it("should assert an object has a certain property", function () {
    const obj = { name: "John", age: 30 };
    obj.should.have.property("name");
  });
});

In the example, chai is imported and the should assertion style is enabled by calling chai.should(). The test case then includes three assertions that use the should syntax to make different types of comparisons.