import { assert } from "chai"; describe("Example Test Suite", () => { it("Example Test Case", () => { assert.fail("This test case will always fail"); }); });In this example, we import the assert method from the Chai library and use it within a test case. We then call the fail method on the assert object and pass in a string as an argument. This string is the error message that will be displayed if the test case fails. The package library used in this example is "chai". This package provides various assertion methods, including the fail method, that can be used in testing.