void testHasDefaultCredentials_withNonAnonymous() {
        when(mockCredentials.isAnonymous()).thenReturn(false);
        assertTrue(context.hasDefaultCredentials());
    }

    @Test
    void testHasDefaultCredentials_withAnonymous() {
        when(mockCredentials.isAnonymous()).thenReturn(true);
        assertFalse(context.hasDefaultCredentials());
    }

    @Test
    void testHasDefaultCredentials_withNull() {