packages/browser/src/helpers/browserSupportsWebAuthn.test.ts


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import { browserSupportsWebAuthn } from "./browserSupportsWebAuthn";

beforeEach(() => {
  // @ts-ignore 2741
  window.PublicKeyCredential = jest.fn().mockReturnValue(() => {});
});

test("should return true when browser supports WebAuthn", () => {
  expect(browserSupportsWebAuthn()).toBe(true);
});

test("should return false when browser does not support WebAuthn", () => {
  // This looks weird but it appeases the linter so it's _fiiiine_
  delete (window as { PublicKeyCredential: unknown }).PublicKeyCredential;
  expect(browserSupportsWebAuthn()).toBe(false);
});

test("should return false when window is undefined", () => {
  // Make window undefined as it is in node environments.
  const windowSpy = jest.spyOn<typeof globalThis, "window">(
    global,
    "window",
    "get",
  );
  // @ts-ignore: Intentionally making window unavailable
  windowSpy.mockImplementation(() => undefined);

  expect(window).toBe(undefined);
  expect(browserSupportsWebAuthn()).toBe(false);

  // Restore original window value.
  windowSpy.mockRestore();
});