Add null check to nonce in module.test.ts

Signed-off-by: JP Dhabolt <john.p.dhabolt@gmail.com>

plugins/auth-backend-module-oidc-provider/src/module.test.ts

@@ -196,6 +196,7 @@ describe('authModuleOidcProvider', () => {
     expect(startUrl.origin).toBe('https://oidc.test');
     expect(startUrl.pathname).toBe('/oauth2/authorize');
     const expected = Object.fromEntries(startUrl.searchParams);
+    expect(expected.nonce).not.toBeNull();
     expect(expected).toEqual({
       response_type: 'code',
       scope: 'openid profile email',