for (int i = 0; i < 5; i++) {
            assertFalse(keyManager.hasSessionKey("session-" + i), "Key should be removed");
        }
    }

    @Test
    public void testGenerateRandomKey() {
        byte[] key1 = keyManager.generateRandomKey(32);
        byte[] key2 = keyManager.generateRandomKey(32);

        assertNotNull(key1, "Should generate key 1");