import supportsWebauthn from './supportsWebauthn'; beforeEach(() => { // @ts-ignore 2741 window.PublicKeyCredential = jest.fn().mockReturnValue(() => {}); }); test('should return true when browser supports WebAuthn', () => { expect(supportsWebauthn()).toBe(true); }); test('should return false when browser does not support WebAuthn', () => { delete window.PublicKeyCredential; expect(supportsWebauthn()).toBe(false); });