assertEquals(", World!", new String(remaining, 0, remainingBytes, "UTF-8"));
        }
    }

    // --- isInMemory() tests ---

    @Test
    public void testIsInMemory_WithByteArray() {
        // ## Arrange ##
        ContentCache cache = new ContentCache("test".getBytes());

        // ## Assert ##
        assertTrue(cache.isInMemory());
    }

    @Test