How to get 100% coverage with file input element?

My coverage gives only 75%, I would like to get 100% of coverage.

Here is my TS file:

export default class MyClass {
    constructor(){
        this.render();
    }

    render() {

        const el:HTMLInputElement = document.createElement('input') as HTMLInputElement;
        const link:HTMLAnchorElement = document.createElement('a') as HTMLAnchorElement;
        const container:HTMLBodyElement = document.querySelector('body') as HTMLBodyElement;

        link.innerHTML = "Click Me!";
        link.setAttribute('href', '#');
        link.setAttribute('target', '_blank');

        el.setAttribute('type', 'file');
        container.appendChild(el);
        container.appendChild(link);

        el.addEventListener('change', (event) => {
            if('files' in el) {
                const availFile = el.files[0];
                const blob = new Blob([availFile], { type: availFile.type});

                const objectURL = window.URL.createObjectURL(blob);
                link.setAttribute('href', objectURL);

            }
        })
    }
}


new MyClass();

Here is my spec file:

import MyClass from "./index";
jest.mock('./index');

describe("testing as first", () => {

    it("we can test the constructor", () => {
        const myClass = new MyClass();
        expect(MyClass).toHaveBeenCalledTimes(1);
    });

    it('will render element', () => {
        const myClass = new MyClass();
        myClass.render();
        expect(document.querySelector('input')).toBeTruthy();
        expect(document.querySelector('a')).toBeTruthy();
    })

});

I don't have any idea to reach 100%.