Arrays.fill(decrypted, '\0');
        } finally {
            storage2.close();
        }

        Arrays.fill(plaintext, '\0');
    }

    @Test
    public void testDestroy() throws Exception {
        char[] plaintext = "DestroyTest".toCharArray();
        byte[] encrypted = storage.encryptCredentials(plaintext);

        when(filterConfig.getInitParameter(anyString())).thenAnswer(invocation -> initParams.get(invocation.getArgument(0)));

        assertDoesNotThrow(() -> filter.init(filterConfig));
    }

    @Test
    void testDestroy() {
        // Test that destroy method executes without errors
        assertDoesNotThrow(() -> filter.destroy());
    }

    @Test