Example 4 of my JavaScript and React unit tests basics

Example 4.js

describe("deletePost", () => {
    test("calls the REST API method to delete the post", () => {
        // Setup
        const mockUser = new User({ username: "bob" });

        mockUser.ajax = spy();
        mockUser.login();

        // Action
        mockUser.deletePost();

        // Assertion
        expect(mockUser.ajax).to.haveCallCount(1);
    });
});